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  1. Article ; Online: Could the influence of monitor farm programmes on practice change be BETTER? Lessons from sheep farmers and advisors in Ireland

    Mulkerrins, M. J. / Gottstein, M. / Gorman, M. / Russell, T. / Ryan, M. / Lynch, M. B.

    The Journal of Agricultural Education and Extension. 2023 Oct. 20, v. 29, no. 5 p.653-678

    2023  

    Abstract: To examine the influence of monitor farm programmes on practice change using the Irish BETTER farm sheep programme as a case study. A mixed methods approach combining 16 semi-structured and 69 structured interviews with benchmarking data analysis. ... ...

    Abstract To examine the influence of monitor farm programmes on practice change using the Irish BETTER farm sheep programme as a case study. A mixed methods approach combining 16 semi-structured and 69 structured interviews with benchmarking data analysis. Provision of intensive, tailored advice helped support practice change on the participating monitor farms. They increased productivity through changes in management practices, which positively impacted on financial performance. Monitor farmers also positively influenced members of their associated discussion groups to make practice changes. Practical recommendations for similar programmes are discussed such as the need for different and additional extension approaches to influence and support the adoption of more complex practices and the potential for greater input from farmers into the design and implementation of extension programmes. From a practice change perspective evaluating the influence of a more structured participatory extension programme (PEP) on a participating farmer is easier than the evaluation of the influence of the PEP on the wider farming community, particularly when the evaluation is not incorporated into the original programme design. Adding to the relatively small number of PEP evaluations in developed countries, the influence of monitor farm programmes on both the monitor farmer and their associated discussion group peers is examined for a wide range of practices using a mixed methods approach.
    Keywords agricultural education ; case studies ; farmers ; farms ; finance ; sheep ; Ireland ; Extension ; monitor farms ; demonstration farms ; discussion groups ; practice change
    Language English
    Dates of publication 2023-1020
    Size p. 653-678.
    Publishing place Routledge
    Document type Article ; Online
    ZDB-ID 920945-1
    ISSN 1750-8622 ; 1381-2335
    ISSN (online) 1750-8622
    ISSN 1381-2335
    DOI 10.1080/1389224X.2022.2125409
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 6156: Show issues

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  2. Article: An assessment of herbage mass, ryegrass cultivar and red clover inclusion on sward productivity, quality and morphology under a cutting protocol

    Holohan, C. / Grace, C. / Bock, M. / Lynch, M. B.

    Journal of agricultural science. 20222022 Feb. 21, Apr. 21, v. 160, no. 1-2

    2022  

    Abstract: The use of ‘cut-and-carry’ (the mechanical harvesting and feeding of fresh grass) has increased in some temperate regions in recent years and evidence suggests that sward management practices in this system differ to conventional grazing. In order to ... ...

    Abstract The use of ‘cut-and-carry’ (the mechanical harvesting and feeding of fresh grass) has increased in some temperate regions in recent years and evidence suggests that sward management practices in this system differ to conventional grazing. In order to investigate this further, a 2 × 3 × 2 factorial experiment was used to examine the effect of low (1489 kg dry matter (DM)/ha; LHM) and high (2142 kg DM/ha; HHM) pre-cutting herbage mass; three ryegrass cultivars, diploid perennial ryegrass (Lolium perenne; DIP), tetraploid perennial ryegrass (TET) and a hybrid ryegrass (Lolium multiflorum × L. perenne; HY); and the inclusion of red clover (Trifolium pratense) on sward herbage production, nutritive value and ryegrass morphology. Plots were harvested according to herbage mass from March to November in 2018 and 2019. Annual DM production was 1489 kg DM/ha higher in HHM than in LHM swards. Pre-cutting herbage mass had no effect on organic matter digestibility (OMD) in early season for DIP and TET swards or in late season for all cultivars. There was an interaction between ryegrass cultivar and clover inclusion in annual yield whereby red clover increased DM production in all cultivars however, its effect was largest in HY swards. Red clover inclusion increased DM production but reduced OMD in early and mid-seasons. Overall, TET swards were lowest in neutral detergent fibre and highest in OMD compared to HY and DIP. Pre-cutting herbage mass, ryegrass cultivar and red clover inclusion require careful consideration when establishing and managing pastures in cut-and-carry systems.
    Keywords Lolium multiflorum ; Lolium perenne ; Trifolium pratense ; agricultural sciences ; cultivars ; digestible organic matter ; diploidy ; grasses ; neutral detergent fiber ; sward ; tetraploidy
    Language English
    Dates of publication 2022-0421
    Size p. 55-65.
    Publishing place Cambridge University Press
    Document type Article
    ZDB-ID 1498349-7
    ISSN 1469-5146 ; 0021-8596
    ISSN (online) 1469-5146
    ISSN 0021-8596
    DOI 10.1017/S0021859622000041
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  3. Article: A survey analysis of farmer practices and perceptions of zero-grazing on Irish dairy farms

    Holohan, C / Russell, T / Mulligan, F.J / Pierce, K.M / Lynch, M.B

    American Dairy Science Association Journal of dairy science. 2021 May, v. 104, no. 5

    2021  

    Abstract: Zero-grazing (ZG; the mechanical harvesting and feeding of fresh grass) is increasingly used in grass-based milk production systems alongside conventional grazing. It allows farmers to supply fresh grass from land parcels that are outside of the main ... ...

    Abstract Zero-grazing (ZG; the mechanical harvesting and feeding of fresh grass) is increasingly used in grass-based milk production systems alongside conventional grazing. It allows farmers to supply fresh grass from land parcels that are outside of the main grazing block during seasonal shortages and periods when climatic conditions limit animal grazing opportunities. The objective of this study was to establish an understanding of current ZG practices on Irish dairy farms, to capture farmer perceptions on the implementation of this management practice, and to identify farmer knowledge requirements on ZG. An online survey was distributed and completed by 130 dairy farmers who use or have used ZG. Zero-grazing was used alongside conventional grazing by 92% of respondents. These farms were particularly fragmented, with between 1 and 14 separate land blocks. Respondents felt ZG helped them overcome fragmentation, increase grass use, and extend grass feeding in spring and autumn. However, extra cost and time input associated with ZG were recognized as key challenges. The majority of respondents rated current technical information available on ZG in the Republic of Ireland as “poor” or “very poor,” and knowledge deficits were identified in the areas of cost analysis, grass management and productivity, cow productivity, cow health and nutrition, and soil fertility.
    Keywords autumn ; cattle productivity ; cost analysis ; cows ; farmers ; grasses ; milk production ; nutrition ; soil fertility ; spring ; surveys ; Irish Republic
    Language English
    Dates of publication 2021-05
    Size p. 5665-5674.
    Publishing place Elsevier Inc.
    Document type Article
    Note NAL-light
    ZDB-ID 242499-x
    ISSN 1525-3198 ; 0022-0302
    ISSN (online) 1525-3198
    ISSN 0022-0302
    DOI 10.3168/jds.2020-19164
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 486: Show issues
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  4. Article: The influence of lime application on the chemical and physical characteristics of acidic grassland soils with impeded drainage

    Corbett, D. / Wall, D. P. / Lynch, M. B. / Tuohy, P.

    Journal of agricultural science. 2021 Apr., v. 159, no. 3-4

    2021  

    Abstract: Soil acidity and poor nutrient use efficiency are major limiting factors as regards output potential on heavy soils, soils which are dominated by high proportions of clay and organic matter, with impeded drainage, high buffering capacity and located in ... ...

    Abstract Soil acidity and poor nutrient use efficiency are major limiting factors as regards output potential on heavy soils, soils which are dominated by high proportions of clay and organic matter, with impeded drainage, high buffering capacity and located in high rainfall areas. Lime is applied in order to counteract these limiting factors and in turn improve agricultural output and productivity. The current study investigates the effects of two commonly used lime products at three comparable treatment rates, ground lime (7.5, 5 and 2.5 tonne/ha) and granulated lime (7.5, 2.5 and 1.5 tonne/ha), applied across three distinct sites. The ability of each lime product and treatment rate to counteract soil acidity, increase nutrient availability and influence soil physical structure was assessed over time. On average across sites, 1 tonne/ha of each lime product increased soil pH by 0.15 and 0.21 pH units between ground and granulated lime, respectively. Site 3 experienced the greatest increase change in soil pH in comparison to the other two sites, largely due to lower clay content and cation exchange capacity. Granulated lime was 5.7 times more expensive than ground lime in its ability to reduce soil acidity. The high treatment rate showed the greatest reduction in soil acidity, aluminium and iron concentration as a mean across all sites. Morgan's soil test phosphorus concentration increased across all sites, with treatment rates having no effect on the rate of increase. There was evidence of reduced soil compaction and lime application showed no negative implication on soil physical structure.
    Keywords agricultural sciences ; aluminum ; cation exchange capacity ; clay ; clay fraction ; grasslands ; impeded drainage ; nutrient availability ; nutrient use efficiency ; organic matter ; phosphorus ; rain ; soil compaction ; soil pH
    Language English
    Dates of publication 2021-04
    Size p. 206-215.
    Publishing place Cambridge University Press
    Document type Article
    ZDB-ID 1498349-7
    ISSN 1469-5146 ; 0021-8596
    ISSN (online) 1469-5146
    ISSN 0021-8596
    DOI 10.1017/S0021859621000381
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  5. Article ; Online: Effect of prolific breed type and silage type on ewe performance during late pregnancy

    Higgins, J.T. / Lott, S. / Markiewicz-Keszycka, M. / Lynch, M.B. / McEvoy, M. / McGovern, F. / Boland, T.M.

    Small Ruminant Research. 2023 Apr. 13, p.106981-

    2023  , Page(s) 106981–

    Abstract: Multiple-bearing ewes undergo significant increases in energy and protein requirements during late pregnancy and high-quality forages are essential to meet these requirements in forage-based production systems. Three prolific breed types (Belclare X, ... ...

    Abstract Multiple-bearing ewes undergo significant increases in energy and protein requirements during late pregnancy and high-quality forages are essential to meet these requirements in forage-based production systems. Three prolific breed types (Belclare X, Lleyn X, and Mule (Blue-faced Leicester ram and a Black-faced mountain ewe)) were offered one of two silage types: Italian ryegrass and red clover silage (IRGRCS) or perennial ryegrass silage (PRGS) in a 3 ×2 factorial experiment. No breed type effects were observed for ewe body weight (BW), body condition score (BCS), and combined litter weight (CLW; P > 0.05) but Mule ewes had lower dry matter (DM) and metabolisable energy intakes compared to Belclare X ewes which subsequently lead to lower colostrum yield over the first 18hours postpartum compared to Belclare X ewes with less colostrum available for their progeny per kg of birth weight (P < 0.05). Silage type had no effect on ewe DM intake, BW, BCS, colostrum yield and composition, CLW, and subsequent lamb performance (P > 0.05). When IRGRCS was offered to ewes, higher apparent efficiency of energy utilisation was achieved (P < 0.0001) with higher ruminal pH and ammonium concentrations. Overall, the nutrient composition of both silage types was similar and silage type had minimal effect on ewe and lamb performance. Prolific breed type can affect forage and nutrient intake and colostrum yield.
    Keywords Lolium multiflorum ; Lolium perenne ; Trifolium pratense ; ammonium ; birth weight ; body condition ; colostrum ; energy ; ewes ; grass silage ; litter weight ; metabolizable energy ; mules ; nutrient content ; nutrient intake ; pH ; pregnancy ; progeny ; rams ; research ; Late pregnancy ; ewe breed type ; nutrition ; intake ; colostrum yield
    Language English
    Dates of publication 2023-0413
    Publishing place Elsevier B.V.
    Document type Article ; Online
    Note Pre-press version
    ZDB-ID 286928-7
    ISSN 0921-4488
    ISSN 0921-4488
    DOI 10.1016/j.smallrumres.2023.106981
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    In stock of ZB MED Bonn / Germany

    Z 4801: Show issues

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  6. Article: The effect of concentrate feeding strategy and dairy cow genotype on milk production, pasture intake, body condition score and metabolic status under restricted grazing conditions

    Brady, E.L. / Kelly, E.T. / Lynch, M.B. / Fahey, A.G. / Pierce, K.M. / Mulligan, F.J.

    Livestock science. 2022 Feb., v. 256

    2022  

    Abstract: The objective of this study was to compare the effects of contrasting concentrate feeding strategies and dairy cow genotypes on milk production, pasture intake, energy balance, and metabolic status under restricted grazing conditions. Fifty-eight ... ...

    Abstract The objective of this study was to compare the effects of contrasting concentrate feeding strategies and dairy cow genotypes on milk production, pasture intake, energy balance, and metabolic status under restricted grazing conditions. Fifty-eight Holstein Friesian cows were assigned to concentrate feeding strategy and genotype treatments in a 2 ˣ 2 factorial arrangement, in a randomized complete block design. Treatments were balanced for days in milk, parity, previous 305-day milk yield, and body condition score (BCS). The dietary treatments offered over the 11-week experimental period were a low flat rate concentrate allowance of 1.76 kg DM/d typical of a low input system (CON, n = 29) or a “feed to yield” concentrate allowance (FY, n = 29). The FY treatment included feeding a base of 1.76 kg DM plus 0.44 kg DM of concentrates/kg of milk above the base milk yield. All cows were allocated 13 kg DM of grass. The genotype treatments consisted of lower fertility higher milk (LFHM) and higher fertility lower milk (HFLM) cows based on Economic Breeding Index figures. The FY strategy resulted in a higher milk (+ 1.77 kg/d) and a higher fat plus protein yield (+ 0.12 kg/d) and increased BCS (+ 0.12 units) compared to CON. The metabolic status of FY cows differed from CON cows as evidenced by the reduced β-hydroxybutyrate and non-esterified fatty acid concentrations. Genotype did not influence milk output but did affect total dry matter intake (DMI) and BCS. Cows of LFHM tended to have higher yields on the FY resulting in increased milk yield of 11% compared to FY-HFLM cows. Cows of HFLM fed CON had greater fat and protein output of 0.5 kg and 0.5 kg, respectively compared to the CON-LFHM. No differences in feed efficiency was observed between treatments. Despite cows originating from a higher output herd, differences in genotype had a significant effect on the response to the concentrate feeding strategies. These observations are important when identifying suitable genotypes or feeding strategies that most suit grazing systems.
    Keywords Holstein ; body condition ; dairy cows ; dry matter intake ; energy balance ; feed conversion ; free fatty acids ; genotype ; grasses ; herds ; milk ; milk yield ; pastures
    Language English
    Dates of publication 2022-02
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 2226176-X
    ISSN 1878-0490 ; 1871-1413
    ISSN (online) 1878-0490
    ISSN 1871-1413
    DOI 10.1016/j.livsci.2021.104815
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    Z 3115: Show issues

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  7. Article ; Online: A survey analysis of farmer practices and perceptions of zero-grazing on Irish dairy farms.

    Holohan, C / Russell, T / Mulligan, F J / Pierce, K M / Lynch, M B

    Journal of dairy science

    2021  Volume 104, Issue 5, Page(s) 5665–5674

    Abstract: Zero-grazing (ZG; the mechanical harvesting and feeding of fresh grass) is increasingly used in grass-based milk production systems alongside conventional grazing. It allows farmers to supply fresh grass from land parcels that are outside of the main ... ...

    Abstract Zero-grazing (ZG; the mechanical harvesting and feeding of fresh grass) is increasingly used in grass-based milk production systems alongside conventional grazing. It allows farmers to supply fresh grass from land parcels that are outside of the main grazing block during seasonal shortages and periods when climatic conditions limit animal grazing opportunities. The objective of this study was to establish an understanding of current ZG practices on Irish dairy farms, to capture farmer perceptions on the implementation of this management practice, and to identify farmer knowledge requirements on ZG. An online survey was distributed and completed by 130 dairy farmers who use or have used ZG. Zero-grazing was used alongside conventional grazing by 92% of respondents. These farms were particularly fragmented, with between 1 and 14 separate land blocks. Respondents felt ZG helped them overcome fragmentation, increase grass use, and extend grass feeding in spring and autumn. However, extra cost and time input associated with ZG were recognized as key challenges. The majority of respondents rated current technical information available on ZG in the Republic of Ireland as "poor" or "very poor," and knowledge deficits were identified in the areas of cost analysis, grass management and productivity, cow productivity, cow health and nutrition, and soil fertility.
    MeSH term(s) Animal Feed/analysis ; Animals ; Cattle ; Dairying ; Diet ; Farmers ; Farms ; Female ; Humans ; Ireland ; Lactation ; Milk ; Perception ; Surveys and Questionnaires
    Language English
    Publishing date 2021-03-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 242499-x
    ISSN 1525-3198 ; 0022-0302
    ISSN (online) 1525-3198
    ISSN 0022-0302
    DOI 10.3168/jds.2020-19164
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.B 810: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

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  8. Article ; Online: The effect of nutritional management in early lactation and dairy cow genotype on milk production, metabolic status, and uterine recovery in a pasture-based system.

    Brady, E L / Pierce, K M / Lynch, M B / Fahey, A G / Mulligan, F J

    Journal of dairy science

    2021  Volume 104, Issue 5, Page(s) 5522–5538

    Abstract: High levels of milk production coupled with low feed intake cause negative energy balance in early lactation, especially in the first month postpartum (PP). Therefore, specific nutritional management at this time may improve nutritional and metabolic ... ...

    Abstract High levels of milk production coupled with low feed intake cause negative energy balance in early lactation, especially in the first month postpartum (PP). Therefore, specific nutritional management at this time may improve nutritional and metabolic status with the possibility of contrasting genotypes responding differently. Thus, the objective of this study was to compare the effects of nutritional management strategies and dairy cow genotype on milk production, metabolic status, and some fertility parameters during early lactation in a pasture-based system. Sixty Holstein Friesian cows were blocked on parity and genotype [low-fertility high-milk (LFHM) and high-fertility low-milk (HFLM)] and were randomly assigned to 1 of 2 treatments in a 2 × 2 factorial arrangement, in a randomized complete block design based on calving date, previous 305-d milk yield, and precalving body condition score (BCS). The nutritional management treatments were: (1) ad libitum access to fresh pasture plus an allowance of 3 kg of concentrates per day (CTR, n = 30); and (2) ab libitum access to a tailored total mixed ration (TMR, n = 30). These diets were offered for the first 30 d PP. Following the first 30 d PP, cows fed TMR joined the CTR treatment and were managed similarly until 100 d PP. Blood samples were taken at d 7, 14, 21, and 28 PP to determine metabolic status. Milk samples for composition analysis were collected weekly and BCS assessed every 2 wk. Genotype had a significant effect on milk output, whereas LFHM had increased fat (+0.28 kg/d) and fat-plus-protein (+0.17 kg/d) yield in the first 30 d PP compared with HFLM cows. The LFHM group also exhibited higher protein and lactose yields over the first 100 d PP. Nutritional management did create significant differences in milk composition in the first 30 d: TMR cows had lower protein, milk urea nitrogen, and casein concentration and higher lactose concentration than CTR cows. Over the first 100 d PP, TMR cows had higher fat-plus-protein and lactose yields. Feeding TMR reduced concentrations of nonesterified fatty acids (-0.12 mmol/L) and β-hydroxybutyric acid (-0.10 mmol/L) compared with the CTR group. Cows fed TMR had smaller BCS losses from calving to 60 d PP. There was no effect of any treatment on uterine recovery. Cows in the LFHM group demonstrated greater milk production in the first 30 and 100 d in milk. These results demonstrate that feeding cows a TMR for the first month of lactation has positive effects on milk output, metabolic status, and BCS profile.
    MeSH term(s) Animals ; Cattle ; Diet/veterinary ; Female ; Genotype ; Lactation ; Milk ; Parity ; Pregnancy
    Language English
    Publishing date 2021-03-02
    Publishing country United States
    Document type Journal Article ; Randomized Controlled Trial, Veterinary
    ZDB-ID 242499-x
    ISSN 1525-3198 ; 0022-0302
    ISSN (online) 1525-3198
    ISSN 0022-0302
    DOI 10.3168/jds.2020-19329
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.B 810: Show issues Location:
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    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

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  9. Article: The effect of nutritional management in early lactation and dairy cow genotype on milk production, metabolic status, and uterine recovery in a pasture-based system

    Brady, E.L / Pierce, K.M / Lynch, M.B / Fahey, A.G / Mulligan, F.J

    American Dairy Science Association Journal of dairy science. 2021 May, v. 104, no. 5

    2021  

    Abstract: High levels of milk production coupled with low feed intake cause negative energy balance in early lactation, especially in the first month postpartum (PP). Therefore, specific nutritional management at this time may improve nutritional and metabolic ... ...

    Abstract High levels of milk production coupled with low feed intake cause negative energy balance in early lactation, especially in the first month postpartum (PP). Therefore, specific nutritional management at this time may improve nutritional and metabolic status with the possibility of contrasting genotypes responding differently. Thus, the objective of this study was to compare the effects of nutritional management strategies and dairy cow genotype on milk production, metabolic status, and some fertility parameters during early lactation in a pasture-based system. Sixty Holstein Friesian cows were blocked on parity and genotype [low-fertility high-milk (LFHM) and high-fertility low-milk (HFLM)] and were randomly assigned to 1 of 2 treatments in a 2 × 2 factorial arrangement, in a randomized complete block design based on calving date, previous 305-d milk yield, and precalving body condition score (BCS). The nutritional management treatments were: (1) ad libitum access to fresh pasture plus an allowance of 3 kg of concentrates per day (CTR, n = 30); and (2) ab libitum access to a tailored total mixed ration (TMR, n = 30). These diets were offered for the first 30 d PP. Following the first 30 d PP, cows fed TMR joined the CTR treatment and were managed similarly until 100 d PP. Blood samples were taken at d 7, 14, 21, and 28 PP to determine metabolic status. Milk samples for composition analysis were collected weekly and BCS assessed every 2 wk. Genotype had a significant effect on milk output, whereas LFHM had increased fat (+0.28 kg/d) and fat-plus-protein (+0.17 kg/d) yield in the first 30 d PP compared with HFLM cows. The LFHM group also exhibited higher protein and lactose yields over the first 100 d PP. Nutritional management did create significant differences in milk composition in the first 30 d: TMR cows had lower protein, milk urea nitrogen, and casein concentration and higher lactose concentration than CTR cows. Over the first 100 d PP, TMR cows had higher fat-plus-protein and lactose yields. Feeding TMR reduced concentrations of nonesterified fatty acids (−0.12 mmol/L) and β-hydroxybutyric acid (−0.10 mmol/L) compared with the CTR group. Cows fed TMR had smaller BCS losses from calving to 60 d PP. There was no effect of any treatment on uterine recovery. Cows in the LFHM group demonstrated greater milk production in the first 30 and 100 d in milk. These results demonstrate that feeding cows a TMR for the first month of lactation has positive effects on milk output, metabolic status, and BCS profile.
    Keywords Holstein ; blood ; body condition ; casein ; dairy cows ; early lactation ; energy balance ; feed intake ; genotype ; lactose ; milk ; milk yield ; pastures ; urea nitrogen
    Language English
    Dates of publication 2021-05
    Size p. 5522-5538.
    Publishing place Elsevier Inc.
    Document type Article
    Note NAL-light
    ZDB-ID 242499-x
    ISSN 1525-3198 ; 0022-0302
    ISSN (online) 1525-3198
    ISSN 0022-0302
    DOI 10.3168/jds.2020-19329
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 486: Show issues
    Einzelsign.: Show issues

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  10. Article: Agronomic performance of ten perennial ryegrass varieties on commercial grassland farms

    Hearn, C. / Egan, M. / Berry, D.P. / Geoghegan, A. / O'Leary, M. / Lynch, M.B. / O'Donovan, M.

    Journal of agricultural science. 2021 Sept., v. 159, no. 7-8

    2021  

    Abstract: Little information is available on the phenotypic performance of perennial ryegrass varieties when exposed to grazing conditions on commercial grassland farms. Grass varieties are classically evaluated in mechanically defoliated plot systems which, ... ...

    Abstract Little information is available on the phenotypic performance of perennial ryegrass varieties when exposed to grazing conditions on commercial grassland farms. Grass varieties are classically evaluated in mechanically defoliated plot systems which, although designed to mimic grazing conditions, do not fully capture the range of stresses or interactions that a sward is subjected to under commercial settings or over any period longer than 4 years. The evolution of technology in the form of PastureBase Ireland has led to agronomic data of individual paddocks being made available for analysis over multiple years. Data used in the current study consisted of dry matter (DM) production and ground score data across a 7-year period from ten perennial ryegrass varieties grown as monocultures in 559 paddocks on 98 commercial farms. The results demonstrated how perennial ryegrass variety is associated with a range of agronomic performance traits on commercial farms; including total and seasonal DM production, grazing DM production and number of grazing events. Varieties with the highest total DM production also had the highest spring and mid-season DM production; autumn DM production was associated with the interaction between variety and year. The highest producing variety in the study, AberGain, produced 1342 kg DM/ha/year more than the mean of all other varieties. Variety differences manifested themselves as swards aged, with some varieties increasing in total DM production while others reduced in total DM production. The current work provides a basis for the consideration of on-farm variety assessment in the composition of future variety evaluation protocols.
    Keywords Lolium perenne ; agricultural sciences ; agronomic traits ; autumn ; grasses ; grasslands ; phenotype ; spring ; sward ; Ireland
    Language English
    Dates of publication 2021-09
    Size p. 604-614.
    Publishing place Cambridge University Press
    Document type Article
    ZDB-ID 1498349-7
    ISSN 1469-5146 ; 0021-8596
    ISSN (online) 1469-5146
    ISSN 0021-8596
    DOI 10.1017/S0021859621000927
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    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

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