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Article: Seasonal variations in C/N/P/K stoichiometric characteristics in different plant organs in the various forest types of Sygera Mountain.

Li, Yueyao / Wang, Jiaxiang / Wang, Luqi

2024 Volume 15, Page(s) 1293934

Abstract: We explored the resource acquisition and growth strategies of plants adapting to different environments, focusing on the typical forest types of Sygera Mountain: ...

Abstract	We explored the resource acquisition and growth strategies of plants adapting to different environments, focusing on the typical forest types of Sygera Mountain:
Language	English
Publishing date	2024-02-01
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2613694-6
ISSN	1664-462X
ISSN	1664-462X
DOI	10.3389/fpls.2024.1293934
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: C, N, P, K stoichiometric characteristics of the “leaf-root-litter-soil” system in dryland plantations

Li, Yage / Dong, Xiaoxue / Yao, Wenxiu / Han, Chun / Sun, Shan / Zhao, Changming

Ecological indicators. 2022 Oct., v. 143

2022

Abstract: ... measured C, N, P and K contents of green leaves, fine roots, leaf litter and surface soil (0–20 cm ... Results showed tree species and afforestation years strongly changed C, N, P and K contents and ratios ... were higher than those in evergreen plantations, resulting in the lower C:N:P:K stoichiometry ...

Abstract	Plantation’s nutrient cycling can regulate and affect the material cycling of ecosystems, which is the key to maintain the sustainable development of the plantation ecosystem. However, the current understanding of the nutrient cycling characteristics of the “leave-root-litter-soil” continuum of dryland plantation ecosystems is limited. Therefore, in the Longzhong Loess Plateau of China, we selected nine typical dryland plantations to carry related research, including two evergreen (Platycladus orientalis (13-years and 50-years) and Pinus tabuliformis) and four deciduous (Caragana korshinskii (13-years, 35-years and 55-years), Armeniaca sibirica, Populus hopeiensis and Tamarix chinensis) tree species, and measured C, N, P and K contents of green leaves, fine roots, leaf litter and surface soil (0–20 cm). Results showed tree species and afforestation years strongly changed C, N, P and K contents and ratios of green leaves, fine roots, leaf litter and soil components, and also significantly affected leaf N, P and K reabsorption efficiencies. The average N, P and K contents of four components and soil available nitrogen (AN), available phosphorus (AP) and available potassium (AK) contents in deciduous plantations were higher than those in evergreen plantations, resulting in the lower C:N:P:K stoichiometry of deciduous plantations than evergreen plantations. Especially in 55-years C. korshinskii plantation, its soil C, N, AN, AP and AK contents were higher than those in A. sibirica, P. hopeiensis, P. orientalis and P. tabuliformis plantations. Moreover, soil C, N, P, AN, AP and AK contents in C. korshinskii plantations increased significantly with the increase of afforestation years. Thus, C. korshinskii was more suitable for ecological restoration in drylands. Due to the P limitation in plantations, P reabsorption efficiency was higher than N reabsorption efficiency, and significantly negatively correlated with P contents of four components. And green leaves had the homeostasis to soil AP, which may be the nutrient utilization strategies for plantations to alleviate P limitation. Correlation analysis revealed that the C cycling appeared in green leave-fine root and green leave-leaf litter, the N cycling appeared in green leave-leaf litter-soil-fine root, and the P cycling and K cycling appeared in green leave-leaf litter- soil and leaf litter-fine root. These results will provide guidance for ecological restoration and plantation management in drylands.
Keywords	Caragana korshinskii ; Pinus tabuliformis ; Platycladus orientalis ; Populus ; Prunus sibirica ; Tamarix chinensis ; afforestation ; arid lands ; ecological restoration ; ecosystems ; homeostasis ; leaves ; nitrogen ; nutrient utilization ; phosphorus ; plant litter ; potassium ; resorption ; stoichiometry ; sustainable development ; trees ; China
Language	English
Dates of publication	2022-10
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	2036774-0
ISSN	1872-7034 ; 1470-160X
ISSN (online)	1872-7034
ISSN	1470-160X
DOI	10.1016/j.ecolind.2022.109371
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: C, N, P, K stoichiometric characteristics of the “leaf-root-litter-soil” system in dryland plantations

Yage Li / Xiaoxue Dong / Wenxiu Yao / Chun Han / Shan Sun / Changming Zhao

Ecological Indicators, Vol 143, Iss , Pp 109371- (2022)

2022

Abstract	Plantation’s nutrient cycling can regulate and affect the material cycling of ecosystems, which is the key to maintain the sustainable development of the plantation ecosystem. However, the current understanding of the nutrient cycling characteristics of the “leave-root-litter-soil” continuum of dryland plantation ecosystems is limited. Therefore, in the Longzhong Loess Plateau of China, we selected nine typical dryland plantations to carry related research, including two evergreen (Platycladus orientalis (13-years and 50-years) and Pinus tabuliformis) and four deciduous (Caragana korshinskii (13-years, 35-years and 55-years), Armeniaca sibirica, Populus hopeiensis and Tamarix chinensis) tree species, and measured C, N, P and K contents of green leaves, fine roots, leaf litter and surface soil (0–20 cm). Results showed tree species and afforestation years strongly changed C, N, P and K contents and ratios of green leaves, fine roots, leaf litter and soil components, and also significantly affected leaf N, P and K reabsorption efficiencies. The average N, P and K contents of four components and soil available nitrogen (AN), available phosphorus (AP) and available potassium (AK) contents in deciduous plantations were higher than those in evergreen plantations, resulting in the lower C:N:P:K stoichiometry of deciduous plantations than evergreen plantations. Especially in 55-years C. korshinskii plantation, its soil C, N, AN, AP and AK contents were higher than those in A. sibirica, P. hopeiensis, P. orientalis and P. tabuliformis plantations. Moreover, soil C, N, P, AN, AP and AK contents in C. korshinskii plantations increased significantly with the increase of afforestation years. Thus, C. korshinskii was more suitable for ecological restoration in drylands. Due to the P limitation in plantations, P reabsorption efficiency was higher than N reabsorption efficiency, and significantly negatively correlated with P contents of four components. And green leaves had the homeostasis to soil AP, which may be the nutrient ...
Keywords	Ecological stoichiometry ; Nutrient reabsorption efficiency ; Homeostasis ; Nutrient limitation ; The Longzhong Loess Plateau ; Ecology ; QH540-549.5
Subject code	580
Language	English
Publishing date	2022-10-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Soil C, N, P, K and Enzymes Stoichiometry of an Endangered Tree Species, Parashorea chinensis of Different Stand Ages Unveiled Soil Nutrient Limitation Factors

Li, Wannian / Iẓhār, ʻAlī / Han, Xiaomei / Ullah, Saif / Yang, Mei

Forests. 2023 Mar. 20, v. 14, no. 3

2023

Abstract: ... on the soil C/N, C/P, N/P, C/K, N/K, and P/K, the stoichiometry of microbial biomass C, N, and P, and ... by the stand age, and the soil carbon (C), nitrogen (N), and phosphorus (P) content limit soil microorganisms ... at all stand ages; (2) the availability of soil N, P, and K elements is an essential factor driving P ...

Abstract	Parashorea chinensis is an endemic tree species in China and an endangered species of the Dipterocarpaceae family. This study contributes to the understanding of soil fertility management during the relocation and conservation of P. chinensis and the restoration of its natural communities by doing an ecological chemometric investigation of the factors limiting soil nutrients in P. chinensis plantations. To investigate the variation in rhizosphere and non-rhizosphere soil nutrients, microbial biomass, and extracellular enzyme activities, we chose pure plantation stands of 6 ages in the subtropics and calculated stoichiometric ratios. The results show that (1) soil pH is strongly acidic (pH < 4.6) and is less influenced by the stand age, and the soil carbon (C), nitrogen (N), and phosphorus (P) content limit soil microorganisms at all stand ages; (2) the availability of soil N, P, and K elements is an essential factor driving P limitation in the growth of P. chinensis and its soil microbes; (3) stand age has a significant effect on the soil C/N, C/P, N/P, C/K, N/K, and P/K, the stoichiometry of microbial biomass C, N, and P, and the stoichiometry of C, N, and P acquisition enzyme activity. Soil microbial biomass C, N, and P stoichiometry are more sensitive indicators of nutrient limitations than the stoichiometry of enzyme activity and nutrient content; and (4) there was a significant correlation between microbial biomass C, N, and P stoichiometry and soil C/P and N/P, as well as a highly significant (p < 0.01) correlation between the stoichiometry of the enzyme activity and Vector L and Vector A. In conclusion, the plantations of P. chinensis in this study area were established on acidic phosphorus-poor soil, and the ecological stoichiometry of the soil reveals nutrient limitations and its variation with the stand age. P availability plays a key role in the growth of P. chinensis and in improving the rhizosphere microbial community. Therefore, soil effectiveness should be dynamically assessed during the cultivation and relocation conservation of P. chinensis, and a soluble P fertilizer should be supplemental over time in the trees’ root distribution area.
Keywords	Parashorea ; chemometrics ; endangered species ; enzyme activity ; extracellular enzymes ; indigenous species ; microbial biomass ; microbial communities ; nitrogen ; nutrient content ; phosphorus ; phosphorus fertilizers ; rhizosphere ; soil carbon ; soil fertility ; soil nutrients ; soil pH ; stand age ; stoichiometry ; trees ; China
Language	English
Dates of publication	2023-0320
Publishing place	Multidisciplinary Digital Publishing Institute
Document type	Article ; Online
ZDB-ID	2527081-3
ISSN	1999-4907
ISSN	1999-4907
DOI	10.3390/f14030624
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Soil C, N, P, K and Enzymes Stoichiometry of an Endangered Tree Species, Parashorea chinensis of Different Stand Ages Unveiled Soil Nutrient Limitation Factors

Wannian Li / Izhar Ali / Xiaomei Han / Saif Ullah / Mei Yang

Forests, Vol 14, Iss 624, p

2023 Volume 624

Abstract	Parashorea chinensis is an endemic tree species in China and an endangered species of the Dipterocarpaceae family. This study contributes to the understanding of soil fertility management during the relocation and conservation of P. chinensis and the restoration of its natural communities by doing an ecological chemometric investigation of the factors limiting soil nutrients in P. chinensis plantations. To investigate the variation in rhizosphere and non-rhizosphere soil nutrients, microbial biomass, and extracellular enzyme activities, we chose pure plantation stands of 6 ages in the subtropics and calculated stoichiometric ratios. The results show that (1) soil pH is strongly acidic (pH < 4.6) and is less influenced by the stand age, and the soil carbon (C), nitrogen (N), and phosphorus (P) content limit soil microorganisms at all stand ages; (2) the availability of soil N, P, and K elements is an essential factor driving P limitation in the growth of P. chinensis and its soil microbes; (3) stand age has a significant effect on the soil C/N, C/P, N/P, C/K, N/K, and P/K, the stoichiometry of microbial biomass C, N, and P, and the stoichiometry of C, N, and P acquisition enzyme activity. Soil microbial biomass C, N, and P stoichiometry are more sensitive indicators of nutrient limitations than the stoichiometry of enzyme activity and nutrient content; and (4) there was a significant correlation between microbial biomass C, N, and P stoichiometry and soil C/P and N/P, as well as a highly significant ( p < 0.01) correlation between the stoichiometry of the enzyme activity and Vector L and Vector A. In conclusion, the plantations of P. chinensis in this study area were established on acidic phosphorus-poor soil, and the ecological stoichiometry of the soil reveals nutrient limitations and its variation with the stand age. P availability plays a key role in the growth of P. chinensis and in improving the rhizosphere microbial community. Therefore, soil effectiveness should be dynamically assessed during the ...
Keywords	Parashorea chinensis ; endangered species ; stoichiometry ; rhizosphere soil ; nutrient limitation ; stand age ; Plant ecology ; QK900-989
Subject code	630
Language	English
Publishing date	2023-03-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Decoupling of P from C, N, and K Elements in Cucumber Leaves Caused by Nutrient Imbalance under a Greenhouse Continuous Cropping System

Zheng, Shiwei / Bian, Ting / Wang, Shuang / Zhang, Xiaolan / Li, Xiao / Zhang, Yongyong / Fu, Hongdan / Sun, Zhouping

Horticulturae. 2021 Nov. 29, v. 7, no. 12

2021

Abstract: ... of carbon (C), nitrogen (N), phosphorus (P), and potassium (K) in the leaves of nutrient-enriched greenhouse ... in a solar greenhouse. Soil organic C, total N, and total P concentrations increased by 63.4%, 72.7%, and 144 ... by 9.8% in the CO, while leaf N and K concentrations did not change, suggesting decoupling of P ...

Abstract	There is insufficient information regarding the stoichiometric variation and coupling status of carbon (C), nitrogen (N), phosphorus (P), and potassium (K) in the leaves of nutrient-enriched greenhouse agroecosystems with increasing planting time. Therefore, we assessed the variation in elemental stoichiometry ratios in soil and cucumber (Cucumis sativus L.) leaves, and the coupling status of elemental utilization in the leaves under continuous cropping systems using natural (only soil; i.e., control soil, CO) and artificial (soil + straw + chicken + urea; i.e., straw mixture soil, ST) soil via monitoring studies for 11 years in a solar greenhouse. Soil organic C, total N, and total P concentrations increased by 63.4%, 72.7%, and 144.3% in the CO, respectively, after 11 years of cultivation (compared to the first year), and by 18.1%, 24.3%, and 117.7% in the ST under continuous cropping conditions, respectively. Total K concentrations remained unchanged in both soils. Moreover, the availability of these soil elements increased to different degrees in both soils after 11 years of planting. Additionally, the leaf P concentration increased by 9.8% in the CO, while leaf N and K concentrations did not change, suggesting decoupling of P utilization from that of N and K in leaves under a continuous cropping system. These findings suggest that imbalanced soil nutrients under continuous cropping conditions results in decoupling of P from N and K in the utilization of leaf nutrients.
Keywords	Cucumis sativus ; agroecosystems ; chickens ; cucumbers ; greenhouses ; leaves ; nitrogen ; phosphorus ; potassium ; soil ; soil organic carbon ; stoichiometry ; straw ; total nitrogen ; urea
Language	English
Dates of publication	2021-1129
Publishing place	Multidisciplinary Digital Publishing Institute
Document type	Article
ZDB-ID	2813983-5
ISSN	2311-7524
ISSN	2311-7524
DOI	10.3390/horticulturae7120528
Database	NAL-Catalogue (AGRICOLA)

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Book ; Online: Measurement of Singly Cabibbo Suppressed Decays $\Lambda_c^{+}\to p\pi^{+}\pi^{-}$ and $\Lambda_c^{+}\to pK^{+}K^{-}$

BESIII collaboration / Ablikim, M. / Achasov, M. N. / Ahmed, S. / Ai, X. C. / Albayrak, O. / Albrecht, M. / Ambrose, D. J. / Amoroso, A. / An, F. F. / An, Q. / Bai, J. Z. / Bakina, O. / Ferroli, R. Baldini / Ban, Y. / Bennett, D. W. / Bennett, J. V. / Berger, N. / Bertani, M. /

Bettoni, D. / Bian, J. M. / Bianchi, F. / Boger, E. / Boyko, I. / Briere, R. A. / Cai, H. / Cai, X. / Cakir, O. / Calcaterra, A. / Cao, G. F. / Cetin, S. A. / Chai, J. / Chang, J. F. / Chelkov, G. / Chen, G. / Chen, H. S. / Chen, J. C. / Chen, M. L. / Chen, S. / Chen, S. J. / Chen, X. / Chen, X. R. / Chen, Y. B. / Cheng, H. P. / Chu, X. K. / Cibinetto, G. / Dai, H. L. / Dai, J. P. / Dbeyssi, A. / Dedovich, D. / Deng, Z. Y. / Denig, A. / Denysenko, I. / Destefanis, M. / De Mori, F. / Ding, Y. / Dong, C. / Dong, J. / Dong, L. Y. / Dong, M. Y. / Dou, Z. L. / Du, S. X. / Duan, P. F. / Fan, J. Z. / Fang, J. / Fang, S. S. / Fang, X. / Fang, Y. / Farinelli, R. / Fava, L. / Fegan, S. / Feldbauer, F. / Felici, G. / Feng, C. Q. / Fioravanti, E. / Fritsch, M. / Fu, C. D. / Gao, Q. / Gao, X. L. / Gao, Y. / Gao, Z. / Garzia, I. / Goetzen, K. / Gong, L. / Gong, W. X. / Gradl, W. / Greco, M. / Gu, M. H. / Gu, Y. T. / Guan, Y. H. / Guo, A. Q. / Guo, L. B. / Guo, R. P. / Guo, Y. / Guo, Y. P. / Haddadi, Z. / Hafner, A. / Han, S. / Hao, X. Q. / Harris, F. A. / He, K. L. / Heinsius, F. H. / Held, T. / Heng, Y. K. / Holtmann, T. / Hou, Z. L. / Hu, C. / Hu, H. M. / Hu, J. F. / Hu, T. / Hu, Y. / Huang, G. S. / Huang, J. S. / Huang, X. T. / Huang, X. Z. / Huang, Y. / Huang, Z. L. / Hussain, T. / Andersson, W. Ikegami / Ji, Q. / Ji, Q. P. / Ji, X. B. / Ji, X. L. / Jiang, L. W. / Jiang, X. S. / Jiang, X. Y. / Jiao, J. B. / Jiao, Z. / Jin, D. P. / Jin, S. / Johansson, T. / Julin, A. / Kalantar-Nayestanaki, N. / Kang, X. L. / Kang, X. S. / Kavatsyuk, M. / Ke, B. C. / Kiese, P. / Kliemt, R. / Kloss, B. / Kolcu, O. B. / Kopf, B. / Kornicer, M. / Kupsc, A. / Kühn, W. / Lange, J. S. / Lara, M. / Larin, P. / Leithoff, H. / Leng, C. / Li, C. / Li, Cheng / Li, D. M. / Li, F. / Li, F. Y. / Li, G. / Li, H. B. / Li, H. J. / Li, J. C. / Li, Jin / Li, K. / Li, Lei / Li, P. L. / Li, P. R. / Li, Q. Y. / Li, T. / Li, W. D. / Li, W. G. / Li, X. L. / Li, X. N. / Li, X. Q. / Li, Y. B. / Li, Z. B. / Liang, H. / Liang, Y. F. / Liang, Y. T. / Liao, G. R. / Lin, D. X. / Liu, B. / Liu, B. J. / Liu, C. X. / Liu, D. / Liu, F. H. / Liu, Fang / Liu, Feng / Liu, H. B. / Liu, H. H. / Liu, H. M. / Liu, J. / Liu, J. B. / Liu, J. P. / Liu, J. Y. / Liu, K. / Liu, K. Y. / Liu, L. D. / Liu, P. L. / Liu, Q. / Liu, S. B. / Liu, X. / Liu, Y. B. / Liu, Y. Y. / Liu, Z. A. / Liu, Zhiqing / Loehner, H. / Long, Y. F. / Lou, X. C. / Lu, H. J. / Lu, J. G. / Lu, Y. / Lu, Y. P. / Luo, C. L. / Luo, M. X. / Luo, T. / Luo, X. L. / Lyu, X. R. / Ma, F. C. / Ma, H. L. / Ma, L. L. / Ma, M. M. / Ma, Q. M. / Ma, T. / Ma, X. N. / Ma, X. Y. / Ma, Y. M. / Maas, F. E. / Maggiora, M. / Malik, Q. A. / Mao, Y. J. / Mao, Z. P. / Marcello, S. / Messchendorp, J. G. / Mezzadri, G. / Min, J. / Min, T. J. / Mitchell, R. E. / Mo, X. H. / Mo, Y. J. / Morales, C. Morales / Muchnoi, N. Yu. / Muramatsu, H. / Musiol, P. / Nefedov, Y. / Nerling, F. / Nikolaev, I. B. / Ning, Z. / Nisar, S. / Niu, S. L. / Niu, X. Y. / Olsen, S. L. / Ouyang, Q. / Pacetti, S. / Pan, Y. / Patteri, P. / Pelizaeus, M. / Peng, H. P. / Peters, K. / Pettersson, J. / Ping, J. L. / Ping, R. G. / Poling, R. / Prasad, V. / Qi, H. R. / Qi, M. / Qian, S. / Qiao, C. F. / Qin, L. Q. / Qin, N. / Qin, X. S. / Qin, Z. H. / Qiu, J. F. / Rashid, K. H. / Redmer, C. F. / Ripka, M. / Rong, G. / Rosner, Ch. / Ruan, X. D. / Sarantsev, A. / Savrié, M. / Schnier, C. / Schumann, K. Schoenning S. / Shan, W. / Shao, M. / Shen, C. P. / Shen, P. X. / Shen, X. Y. / Sheng, H. Y. / Shi, M. / Song, W. M. / Song, X. Y. / Sosio, S. / Spataro, S. / Sun, G. X. / Sun, J. F. / Sun, S. S. / Sun, X. H. / Sun, Y. J. / Sun, Y. Z. / Sun, Z. J. / Sun, Z. T. / Tang, C. J. / Tang, X. / Tapan, I. / Thorndike, E. H. / Tiemens, M. / Uman, I. / Varner, G. S. / Wang, B. / Wang, B. L. / Wang, D. / Wang, D. Y. / Wang, K. / Wang, L. L. / Wang, L. S. / Wang, M. / Wang, P. / Wang, P. L. / Wang, W. / Wang, W. P. / Wang, X. F. / Wang, Y. / Wang, Y. D. / Wang, Y. F. / Wang, Y. Q. / Wang, Z. / Wang, Z. G. / Wang, Z. H. / Wang, Z. Y. / Weber, T. / Wei, D. H. / Weidenkaff, P. / Wen, S. P. / Wiedner, U. / Wolke, M. / Wu, L. H. / Wu, L. J. / Wu, Z. / Xia, L. / Xia, L. G. / Xia, Y. / Xiao, D. / Xiao, H. / Xiao, Z. J. / Xie, Y. G. / Xiu, Q. L. / Xu, G. F. / Xu, J. J. / Xu, L. / Xu, Q. J. / Xu, Q. N. / Xu, X. P. / Yan, L. / Yan, W. B. / Yan, W. C. / Yan, Y. H. / Yang, H. J. / Yang, H. X. / Yang, L. / Yang, Y. X. / Ye, M. / Ye, M. H. / Yin, J. H. / You, Z. Y. / Yu, B. X. / Yu, C. X. / Yu, J. S. / Yuan, C. Z. / Yuan, W. L. / Yuan, Y. / Yuncu, A. / Zafar, A. A. / Zallo, A. / Zeng, Y. / Zeng, Z. / Zhang, B. X. / Zhang, B. Y. / Zhang, C. / Zhang, C. C. / Zhang, D. H. / Zhang, H. H. / Zhang, H. Y. / Zhang, J. / Zhang, J. J. / Zhang, J. L. / Zhang, J. Q. / Zhang, J. W. / Zhang, J. Y. / Zhang, J. Z. / Zhang, K. / Zhang, L. / Zhang, S. Q. / Zhang, X. Y. / Zhang, Y. / Zhang, Y. H. / Zhang, Y. N. / Zhang, Y. T. / Zhang, Yu / Zhang, Z. H. / Zhang, Z. P. / Zhang, Z. Y. / Zhao, G. / Zhao, J. W. / Zhao, J. Y. / Zhao, J. Z. / Zhao, Lei / Zhao, Ling / Zhao, M. G. / Zhao, Q. / Zhao, Q. W. / Zhao, S. J. / Zhao, T. C. / Zhao, Y. B. / Zhao, Z. G. / Zhemchugov, A. / Zheng, B. / Zheng, J. P. / Zheng, W. J. / Zheng, Y. H. / Zhong, B. / Zhou, L. / Zhou, X. / Zhou, X. K. / Zhou, X. R. / Zhou, X. Y. / Zhu, K. / Zhu, K. J. / Zhu, S. / Zhu, S. H. / Zhu, X. L. / Zhu, Y. C. / Zhu, Y. S. / Zhu, Z. A. / Zhuang, J. / Zotti, L. / Zou, B. S. / Zou, J. H.

2016

Abstract: ... suppressed decays $\Lambda_c^{+}\to p\pi^{+}\pi^{-}$ and $\Lambda_c^{+}\to pK^{+}K^{-}$. By normalizing ... of the branching fraction for $\Lambda_c^{+}\to pK^{+}K^{-}_{\text{non-}\phi}$ and $\Lambda_c^{+}\to p\phi$ is ... fractions: $\frac{\mathcal{B}(\Lambda_c^{+}\to p\pi^{+}\pi^{-})}{\mathcal{B}(\Lambda_c^{+}\to pK^{-}\pi^ ...

Abstract	Using 567 $pb^{-1}$ of data collected with the BESIII detector at a center-of-mass energy of $\sqrt{s}=$ 4.599 $GeV$, near the $\Lambda_{c}^{+}\Lambda_{c}^{-}$ threshold, we study the singly Cabibbo-suppressed decays $\Lambda_c^{+}\to p\pi^{+}\pi^{-}$ and $\Lambda_c^{+}\to pK^{+}K^{-}$. By normalizing with respect to the Cabibbo-favored decay $\Lambda_c^{+}\to pK^{-}\pi^{+}$, we obtain ratios of branching fractions: $\frac{\mathcal{B}(\Lambda_c^{+}\to p\pi^{+}\pi^{-})}{\mathcal{B}(\Lambda_c^{+}\to pK^{-}\pi^{+})}$ = $(6.70 \pm 0.48 \pm 0.25)\%$, $\frac{\mathcal{B}(\Lambda_c^{+}\to p\phi)}{\mathcal{B}(\Lambda_c^{+}\to pK^{-}\pi^{+})}$ = $(1.81 \pm 0.33 \pm 0.13)\%$, and $\frac{\mathcal{B}(\Lambda_c^{+}\to pK^{+}K^{-}_{\text{non-}\phi})}{\mathcal{B}(\Lambda_c^{+}\to pK^{-}\pi^{+})}$ = $(9.36 \pm 2.22 \pm 0.71)\times10^{-3}$, where the uncertainties are statistical and systematic, respectively. The absolute branching fractions are also presented. Among these measurements, the decay $\Lambda_c^{+}\to p\pi^{+}\pi^{-}$ is observed for the first time, and the precision of the branching fraction for $\Lambda_c^{+}\to pK^{+}K^{-}_{\text{non-}\phi}$ and $\Lambda_c^{+}\to p\phi$ is significantly improved.
Keywords	High Energy Physics - Experiment
Subject code	612
Publishing date	2016-08-01
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: [C, N, P, K Stoichiometric Characteristic of Leaves, Root and Soil in Different Abandoned Years in Loess Plateau].

Zhang, Hai-dong / Ru, Hai-li / Jiao, Feng / Xue, Chao-yu / Guo, Mei-li

Huan jing ke xue= Huanjing kexue

2016 Volume 37, Issue 3, Page(s) 1128–1138

Abstract: ... K). The results showed that the C, N, P, K contents of plant leaves were 444.21, 22.34, 1.49, 14.66 ... mg · g⁻¹ respectively, the C/N, C/P, C/K, N/P ratios of plant leaves were 21.86, 424.72, 39.82, 20.27 ... respectively; the C, N, P, K contents of root were 285.16, 5.79, 0.27, 6.07 mg · g⁻¹ respectively, the C/N, C/P ...

Abstract	The research of plant ecological stoichiometry characteristics, nutrients distribution and their changes is of great significance to explain the response and adaptation of plants to environmental change. Leaves, root and soil from eight different abandoned years in Yanhe River basin were selected to study the content, characteristic ratio and distribution of carbon ( C) , nitrogen (N) , phosphorus (P), potassium (K). The results showed that the C, N, P, K contents of plant leaves were 444.21, 22.34, 1.49, 14.66 mg · g⁻¹ respectively, the C/N, C/P, C/K, N/P ratios of plant leaves were 21.86, 424.72, 39.82, 20.27 respectively; the C, N, P, K contents of root were 285.16, 5.79, 0.27, 6.07 mg · g⁻¹ respectively, the C/N, C/P, C/K, N/P ratios of root were .60. 56, 1019.33, 46.55, 21.36 respectively; the C, N, P, K contents of soil were 2.28, 0.18, 0.28, 4.33 mg · g⁻¹ respectively, the C/N, C/P, C/K, N/P ratios of soil were 16.43, 8.40, 0.54, 0.66 respectively. During the abandoned year of 1-35, C content of leaves increased, N content increased and then declined, P content declined overall, K content declined and then increased. The C/N, C/P, C/K, N/P ratios of plant leaves showed a rising trend overall. The changing pattern of root was different from that of leaves. Along with the increasing rehabilitation age, C and N contents of soil increased, P content changed as arc-sin function, K content changed as parabola, C/N decreased, C/P, C/K, N/P increased. With the increase of Abandoned Years, the ratio of C, P, K contents in leaves and root decreased, the ratio of C, N, P contents in leaves and soil decreased, the ratio of C, N contents in root and soil decreased. Corresponding relationship and its intension between different abandoned years and plant nutrient limit status and its allocation pattern were different.
MeSH term(s)	Carbon/chemistry ; Nitrogen/chemistry ; Phosphorus/chemistry ; Plant Leaves/chemistry ; Plant Roots/chemistry ; Plants ; Potassium/chemistry ; Soil/chemistry
Chemical Substances	Soil ; Phosphorus (27YLU75U4W) ; Carbon (7440-44-0) ; Nitrogen (N762921K75) ; Potassium (RWP5GA015D)
Language	Chinese
Publishing date	2016-03-15
Publishing country	China
Document type	Journal Article
ISSN	0250-3301
ISSN	0250-3301
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Article: Are the combined effects of warming and drought on foliar C:N:P:K stoichiometry in a subtropical forest greater than their individual effects?

Zhang, Qiufang / Chen, Yuehmin / Li, Xiaojie / Lin, Weisheng / Wang, Jian / Xie, Jinsheng / Yang, Yusheng / Yang, Zhijie / Zheng, Yong / Zhou, Jiacong

Forest ecology and management. 2019 Sept. 15, v. 448

2019

Abstract: Carbon (C), nitrogen (N), phosphorus (P), and, more recently, potassium (K) have been examined ... to warming and drought stresses. To measure C, N, P, and K concentrations, C:N:P:K stoichiometric ratios, and ... that variations in foliar C:N:P:K stoichiometric ratios were driven by changes in nutrient concentration, season ...

Abstract	Carbon (C), nitrogen (N), phosphorus (P), and, more recently, potassium (K) have been examined in ecological stoichiometry because they are the most abundant elements in organic matter. An increasing number of studies are investigating the potential responses of plants to future global climate change scenarios, and although warming and drought may greatly influence ecosystem function and services, their combined effects on C:N:P:K stoichiometry remain unknown. In the present study, we assessed the stoichiometry of a major subtropical tree species Cunninghamia lanceolata (Lamb.) Hook, in southern China in terms of its responses to warming and drought stresses. To measure C, N, P, and K concentrations, C:N:P:K stoichiometric ratios, and stable isotope abundance, we sampled C. lanceolata needles from seedlings subject to four treatments: control (CT), warming (W, with 5 °C increase in temperature), drought (D, with 50% decrease in precipitation), and the abovementioned warming and drought conditions combined (WD). The warming and drought conditions applied simulated the climate changes predicted for the next decades in southern China. We found that variations in foliar C:N:P:K stoichiometric ratios were driven by changes in nutrient concentration, season, and treatment. Unexpectedly, differences in foliar intrinsic water use efficiency across sampling seasons were not significant. The WD conditions increased foliar N concentration (57%) and the δ15N value (111%) across the different seasons, and significant interactive effects between warming and drought on foliar N concentration and δ15N were clearly demonstrated. The N cycle is likely to accelerate in subtropical forests, with more of the “heavier” N being mobilized for plant use, and thus the combination of warming plus drought may alleviate plant N restrictions in the future. Thus, foliar δ15N might be used as an indicator of the changes in N cycling in C. lanceolata forests.
Keywords	carbon ; climate change ; Cunninghamia lanceolata ; drought ; ecological function ; nitrogen ; nitrogen content ; nutrient content ; organic matter ; phosphorus ; potassium ; seedlings ; stable isotopes ; stoichiometry ; temperature ; trees ; tropical forests ; water use efficiency ; China
Language	English
Dates of publication	2019-0915
Size	p. 256-266.
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	751138-3
ISSN	0378-1127
ISSN	0378-1127
DOI	10.1016/j.foreco.2019.06.021
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Growth models of coexisting p(2 × 1) and c(6 × 2) phases on an oxygen-terminated Cu(110) surface studied by noncontact atomic force microscopy at 78 K.

Li, Yan Jun / Lee, Seung Hwan / Kinoshita, Yukinori / Ma, Zong Min / Wen, Huanfei / Nomura, Hikaru / Naitoh, Yoshitaka / Sugawara, Yasuhiro

Nanotechnology

2016 Volume 27, Issue 20, Page(s) 205702

Abstract: We present an experimental study of coexisting p(2 × 1) and c(6 × 2) phases on an oxygen-terminated ... processes of coexisting p(2 × 1)/c(6 × 2) phases on a terrace and near a step are proposed. We found ... that the p(2 × 1) and c(6 × 2) phases are grown from the super Cu atoms on both sides of O-Cu-O rows ...

Abstract	We present an experimental study of coexisting p(2 × 1) and c(6 × 2) phases on an oxygen-terminated Cu(110) surface by noncontact atomic force microscopy (NC-AFM) at 78 K. Ball models of the growth processes of coexisting p(2 × 1)/c(6 × 2) phases on a terrace and near a step are proposed. We found that the p(2 × 1) and c(6 × 2) phases are grown from the super Cu atoms on both sides of O-Cu-O rows of an atomic spacing. In this paper, we summarize our investigations of an oxygen-terminated Cu(110) surface by NC-AFM employing O- and Cu-terminated tips. Also, we state several problems and issues for future investigation.
Language	English
Publishing date	2016-05-20
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1362365-5
ISSN	1361-6528 ; 0957-4484
ISSN (online)	1361-6528
ISSN	0957-4484
DOI	10.1088/0957-4484/27/20/205702
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