Grass and Forage Science最新文献_第9页

Intercropping of orchardgrass and alfalfa improves soil fertility, forage yield, feeding values and land use efficiency while limiting ruminal greenhouse gas emissions 果园草和苜蓿间作提高了土壤肥力、牧草产量、饲养价值和土地利用效率，同时限制了瘤胃温室气体排放

IF 2.4 3区农林科学

Grass and Forage Science Pub Date : 2023-02-11 DOI: 10.1111/gfs.12602

Zhulin Xue, Yunling Wang, Elizabeth Palmer, Yingjun Zhang

{"title":"Intercropping of orchardgrass and alfalfa improves soil fertility, forage yield, feeding values and land use efficiency while limiting ruminal greenhouse gas emissions","authors":"Zhulin Xue, Yunling Wang, Elizabeth Palmer, Yingjun Zhang","doi":"10.1111/gfs.12602","DOIUrl":"10.1111/gfs.12602","url":null,"abstract":"Intercropping has been a globally accepted practice for forage production, however, consideration of multiple performance criteria for intercropping including forage production, feed use efficiency and ruminal greenhouse gas emissions needs to be further investigated. A two-year field study was conducted to evaluate forage dry matter (DM) yield, nutritive value, feeding values and land-use efficiency as well as ruminal carbon dioxide (CO2) and methane (CH4) emissions of intercropped orchardgrass (Dactylis glomerata) and alfalfa (Medicago sativa) sown in five intercropping ratios (100:0, 75:25, 50:50, 25:75, and 0:100, based on seed weight) and three nitrogen (N) fertilizer levels (0, 50, and 100 kg ha−1). Increasing alfalfa proportion and N fertilizer level increased soil nutrients and the two-year total DM yield. Intercropping increased both land and nitrogen use efficiency (NUE) compared with monocultures. Greater NUE was obtained when N fertilizer was applied at 50 kg ha−1, compared with 100 kg ha−1. Increasing the proportion of alfalfa in intercrops increased the crude protein yield and rumen undegraded protein yield. Harvested forage intercrops were incubated with ruminal fluid for 48 h. Degraded DM yield, CO2 and CH4 emissions increased with increasing alfalfa proportion in intercrops. Overall, the 75:25 of orchardgrass-alfalfa intercrops was recommended as the best compromise between high forage productivity, superior feed use efficiency and low ruminal greenhouse gas emissions through complementary effects. The results indicate that the appropriate N fertilization level would be 50 kg ha−1 for acquiring higher nitrogen use efficiency and forage productivity.","PeriodicalId":12767,"journal":{"name":"Grass and Forage Science","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2023-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42479205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Higher density swards have a higher load bearing capacity 密度越高的草地承载能力越强

IF 2.4 3区农林科学

Grass and Forage Science Pub Date : 2023-01-19 DOI: 10.1111/gfs.12603

Pedro W. L. Janssen, Nyncke J. Hoekstra, Nick van Eekeren

{"title":"Higher density swards have a higher load bearing capacity","authors":"Pedro W. L. Janssen, Nyncke J. Hoekstra, Nick van Eekeren","doi":"10.1111/gfs.12603","DOIUrl":"10.1111/gfs.12603","url":null,"abstract":"Increasing the water table is an important pathway to reduce greenhouse gas emissions from peaty soils. In order to continue utilizing grasslands on these soils, methods to increase load bearing capacity at a higher water table are sought. The objective of this study was to assess the effect of sward density on load bearing capacity, measured as both penetration resistance and the newly developed method measuring load bearing capacity through impact depth. Simultaneously, a new method to measure load bearing capacity through impact depth was developed. The study was conducted between 2018 and 2020 on 14 different farms in the western peat meadow district in the Netherlands, where the sward density measured with the point quadrat method ranged from 24% to 92%. Swards with a higher sward density showed a higher load bearing capacity than swards with a lower density. In a modelling approach an increase from 30% sward density to 90% sward density could result in a lengthening of the grazing season between three (11%) and six weeks (22%), depending on the soil moisture conditions. Load bearing capacity was also highly correlated with gravimetric soil moisture content as wetter conditions lowered load bearing capacity. In order to capture load bearing capacity more accurately a new measurement device was constructed which represents treading cattle. Both output (impact depth) and method (resembles cow hoof) are close to practice, which makes it a very suitable method allowing for easy interpretation by farmers.","PeriodicalId":12767,"journal":{"name":"Grass and Forage Science","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2023-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gfs.12603","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47796089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of the Lactiplantibacillus plantarum and Lentilactobacillus buchneri on corn and sorghum silage quality and sheep energy partition under tropical conditions 热带条件下植物乳杆菌和布氏慢乳杆菌对玉米和高粱青贮品质及绵羊能量分配的影响

IF 2.4 3区农林科学

Grass and Forage Science Pub Date : 2023-01-13 DOI: 10.1111/gfs.12604

Frederico Patrus Ananias de Assis Pires, Thierry Ribeiro Tomich, Luiz Gustavo Ribeiro Pereira, Fernanda Samarini Machado, Mariana Magalhães Campos, Alan Figueiredo de Oliveira, Guilherme Lobato Menezes, Rafael Araújo de Menezes, Pamella Grossi de Sousa, Diogo Gonzaga Jayme, Lúcio Carlos Gonçalves

{"title":"Effect of the Lactiplantibacillus plantarum and Lentilactobacillus buchneri on corn and sorghum silage quality and sheep energy partition under tropical conditions","authors":"Frederico Patrus Ananias de Assis Pires, Thierry Ribeiro Tomich, Luiz Gustavo Ribeiro Pereira, Fernanda Samarini Machado, Mariana Magalhães Campos, Alan Figueiredo de Oliveira, Guilherme Lobato Menezes, Rafael Araújo de Menezes, Pamella Grossi de Sousa, Diogo Gonzaga Jayme, Lúcio Carlos Gonçalves","doi":"10.1111/gfs.12604","DOIUrl":"10.1111/gfs.12604","url":null,"abstract":"This study aimed to evaluate the silage quality, ingestive behaviour, and sheep energy partition fed corn and sorghum silages, with or without inoculation with Lactiplantibacillus plantarum and Lentilactobacillus buchneri. Whole plants of one dent corn hybrid (DCS), one flint corn hybrid (FCS), and one forage sorghum hybrid (SS) were ensiled with or without an inoculant containing L. plantarum and L. buchneri (4 × 105 CFU g−1), totalling six treatments (3 × 2 factorial scheme). The treatments were ensiled in metal drums with 200 L capacity. The lactic acid concentrations in the inoculated FCS and DCS were higher by 13.4% and 12.8%, respectively, than those in the non-inoculated plants. In contrast, the lactic acid concentration in the inoculated SS was 23.1% lower than that in the non-inoculated SS. Furthermore, there were differences in pH and acetic acid concentrations only in SS, which were 2.3% and 45.2% higher, respectively, in inoculated silage than in non-inoculated silage. In inoculated DCS and SS, propionic acid concentrations were 1.7 times higher (for both silages), and 1-propanol was 3.7 and 1.8 times higher compared than those in non-inoculated silages. There was a main effect of the inoculant on 1,2-propanediol concentrations, which were 37.5% higher in inoculated silages than in non-inoculated silages. However, ingestive behaviour, heat and methane production, and silage net energy concentrations were not affected by inoculant use. Fermentative modifications caused by inoculation with L. plantarum and L. buchneri in whole plant corn or sorghum silage did not modify sheep energy partition.","PeriodicalId":12767,"journal":{"name":"Grass and Forage Science","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2023-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45674489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Agronomic, nutritive value, reproductive, cytogenetic, and molecular aspects of Paspalum accessions: Contribution to the development of new forage cultivars 雀稗的农艺、营养价值、生殖、细胞遗传学和分子方面:对牧草新品种开发的贡献

IF 2.4 3区农林科学

Grass and Forage Science Pub Date : 2022-12-28 DOI: 10.1111/gfs.12600

Frederico de Pina Matta, Alessandra Pereira Fávero, Bianca Baccili Zanotto Vigna, Marisa Toniolo Pozzobon, Sergio Raposo de Medeiros, Waldomiro Barioni Júnior, Marcelo Mattos Cavallari

{"title":"Agronomic, nutritive value, reproductive, cytogenetic, and molecular aspects of Paspalum accessions: Contribution to the development of new forage cultivars","authors":"Frederico de Pina Matta, Alessandra Pereira Fávero, Bianca Baccili Zanotto Vigna, Marisa Toniolo Pozzobon, Sergio Raposo de Medeiros, Waldomiro Barioni Júnior, Marcelo Mattos Cavallari","doi":"10.1111/gfs.12600","DOIUrl":"10.1111/gfs.12600","url":null,"abstract":"This study investigated the agronomic, nutritive value, cytogenetic, molecular, and reproductive aspects of twenty-five Paspalum accessions to support breeding programs. The agronomic aspects and the nutritive value were evaluated in a randomized block experimental design with four replications, and with monthly repeated measures for 2 years. For the molecular characterization 16 microsatellite markers developed for different Paspalum species in previous works were used. The number of chromosomes was determined by visualizing the meiotic cells and the DNA content was determined by flow cytometry. The embryo sac clarification technique was used to characterize the reproductive system. The results indicated genetic variability for all the variables related to yield and nutritive value. For almost all variables, the values of Paspalum accessions were higher than those of the commercial cultivars Megathyrsus maximus cv. Tanzania and Urochloa brizantha cv. Marandu, used as references. However, the accessions showed in vitro dry matter digestibility values lower than the mean value presented by the references. The groups formed in the molecular analysis showed correspondence to the groups observed in the principal components analysis, considering the variables related to yield and nutritive value. Most accessions were revealed to be tetraploid with 40 chromosomes and most accessions belonging to the Virgata group displayed a sexual embryo sac structure. Some crosses can be indicated for genetic breeding, due to a superior genomic affinity between the accessions and the higher probability of heterosis in the progeny. These results provide subsidies to genetic plant breeding programs that use these accessions.","PeriodicalId":12767,"journal":{"name":"Grass and Forage Science","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42300950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Grassland at the heart of circular and sustainable food systems 草地是循环和可持续粮食系统的核心

IF 2.4 3区农林科学

Grass and Forage Science Pub Date : 2022-12-27 DOI: 10.1111/gfs.12599

Alan Hopkins, Anjo Elgersma

引用次数: 0

Irrigation effects on elephant grass morphology, and its genotype-dependent responses 灌溉对象草形态的影响及其基因型依赖性反应

IF 2.4 3区农林科学

Grass and Forage Science Pub Date : 2022-12-01 DOI: 10.1111/gfs.12596

Robson Elpídio Pereira Ribeiro, Alexandre Carneiro Leão de Mello, Márcio Vieira da Cunha, Suellen Brandão de Miranda Costa, Janerson José Coelho, Rayanne Thalita de Almeida de Souza, Mércia Virginia Ferreira dos Santos

{"title":"Irrigation effects on elephant grass morphology, and its genotype-dependent responses","authors":"Robson Elpídio Pereira Ribeiro, Alexandre Carneiro Leão de Mello, Márcio Vieira da Cunha, Suellen Brandão de Miranda Costa, Janerson José Coelho, Rayanne Thalita de Almeida de Souza, Mércia Virginia Ferreira dos Santos","doi":"10.1111/gfs.12596","DOIUrl":"10.1111/gfs.12596","url":null,"abstract":"This study hypothesised that different elephant grass genotypes respond differently in terms of their morphological development to irrigation. The objective of this study was to evaluate how water availability could affect the morphological development of different genotypes of elephant grass. The treatments consisted of four genotypes of elephant grass [Cenchrus purpureus (Schumach.) Morrone], managed under irrigation or not, during a two-year field trial. The experiment was arranged in a randomised block design in a split-plot, with four replicates per treatment (n = 4). Between the genotypes, two of them were classified as tall-sized (IRI 381 and Elephant B), and two as dwarfs (Taiwan A-146 2.37 and Mott). A three-way interaction between season, irrigation, and genotype affected the variables plant height, stem diameter, number of dead tillers, light interception (LI), and leaf area index (LAI) (p < .05). The morphological development of all genotypes was negatively impacted by the dry season. All genotypes grew taller during the rainy season (p < .05) and had a greater light interception (62%–80%) compared to the dry period (28%–59%). The genotype Mott, showed comparable LI and LAI to the tall-sized genotypes, whilst Taiwan A-146 2.37 was characterized by the lowest values, despite being the genotype with the greatest tiller density (60 tillers m−2) (p < .05). The use of irrigation mitigated the negative effects of the dry season on the plants, however, the type and size (tall vs. dwarf) of the elephant grass genotypes defined the extent of the responses to the use of the irrigation during the dry period.","PeriodicalId":12767,"journal":{"name":"Grass and Forage Science","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47855638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coupling the benefits of grassland crops and green biorefining to produce protein, materials and services for the green transition 将草原作物的效益与绿色生物精炼相结合，为绿色转型生产蛋白质、材料和服务

IF 2.4 3区农林科学

Grass and Forage Science Pub Date : 2022-12-01 DOI: 10.1111/gfs.12594

Uffe Jørgensen, Søren Krogh Jensen, Morten Ambye-Jensen

{"title":"Coupling the benefits of grassland crops and green biorefining to produce protein, materials and services for the green transition","authors":"Uffe Jørgensen, Søren Krogh Jensen, Morten Ambye-Jensen","doi":"10.1111/gfs.12594","DOIUrl":"10.1111/gfs.12594","url":null,"abstract":"Compared with annual grain and seed crops, perennial grassland has significantly lower losses of nutrients and low pesticide requirements, whilst also supporting soil carbon build-up. Until now grassland crops have almost exclusively been fed to ruminants and horses. Our experiments on biorefining forages have produced protein of a quality equal to soybean meal. Forage crops can deliver high yields of biomass as well as protein with a well-balanced amino acid profile. In grass crops from unfertilised permanent grassland, focus has to be on the fibre part of the grass due to a low protein yield. With current techniques we have recovered up to 40% of the forage protein into a protein concentrate with around 50% protein. In addition, a fibre fraction containing 15%–18% protein of dry matter can be produced and used as ruminant feed, bioenergy, or further biorefined into chemical building blocks or bio-materials. Our feeding experiments have shown that biorefined grassland protein can provide a substitute for soybean meal for poultry and pigs without negative effects on animal performance. The first industrial scale biorefineries on green biomass for feed and bioenergy are now established in Denmark, although more research is needed in order to evaluate protein quality for both feed and food applications. In addition, a full EFSA approval has to be obtained for the application for food. The green biorefinery concept opens new markets for grassland and opportunities for increasing the grassland area to obtain associated ecosystem services.","PeriodicalId":12767,"journal":{"name":"Grass and Forage Science","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gfs.12594","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48754942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Putting permanent grassland at the heart of a European agroecological transition: Findings and questions arising from the ‘Ten Years for Agroecology’ (TYFA) scenario 将永久草原置于欧洲农业生态转型的核心：“农业生态学十年”（TYFA）情景的发现和问题

IF 2.4 3区农林科学

Grass and Forage Science Pub Date : 2022-11-29 DOI: 10.1111/gfs.12597

Xavier Poux, Pierre-Marie Aubert

{"title":"Putting permanent grassland at the heart of a European agroecological transition: Findings and questions arising from the ‘Ten Years for Agroecology’ (TYFA) scenario","authors":"Xavier Poux, Pierre-Marie Aubert","doi":"10.1111/gfs.12597","DOIUrl":"10.1111/gfs.12597","url":null,"abstract":"While the importance of permanent grasslands (PG) for the conservation of high nature value habitats is often acknowledged, their role in most of the main sustainable food system scenarios published in the last few years is less explicit. In the best case, the place of permanent grassland in scenarios and policy agendas is their conservation; in the worst one, they are simply replaced by afforested land or cropland, considered as a better option when the focus is on GHG emissions only. In this paper, we defend the idea that several misinterpretations of the positive and negative impacts of ruminants, the ‘natural’ users of PG, explain why ruminants are poorly addressed by most scenarios. Based on the findings of an agroecological scenario for Europe—TYFA, standing for Ten Years For Agroecology—in which extensive permanent grassland and ruminants together play a prominent role for biodiversity conservation, nitrogen cycling and climate change mitigation and adaptation, we call for a research agenda that would better inform the specific role of PG in the provision of ecosystem services—and in particular those that depend on nitrogen management.","PeriodicalId":12767,"journal":{"name":"Grass and Forage Science","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gfs.12597","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45504285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

White clover (Trifolium repens) population dynamics are partly dependent on timing of seminal taproot death 白三叶草(Trifolium repens)种群动态部分取决于种子主根死亡的时间

IF 2.4 3区农林科学

Grass and Forage Science Pub Date : 2022-11-28 DOI: 10.1111/gfs.12598

Pedro W. L. Janssen, Nyncke J. Hoekstra, Jan Rinze van der Schoot, Nick van Eekeren

{"title":"White clover (Trifolium repens) population dynamics are partly dependent on timing of seminal taproot death","authors":"Pedro W. L. Janssen, Nyncke J. Hoekstra, Jan Rinze van der Schoot, Nick van Eekeren","doi":"10.1111/gfs.12598","DOIUrl":"10.1111/gfs.12598","url":null,"abstract":"The expanded usage of white clover has increased the importance of understanding white clover dynamics in pastures. It is assumed that clover plants have a higher tolerance for moisture and nutrient deficiencies when the taproot is still present. Therefore, the survival of the seminal taproot can influence the dynamics of clover. Past breeding efforts in countries like New Zealand have focussed on increasing the taproot longevity through hybridisation with a close relative of white clover. However, there is no direct evidence whether increased survival of the taproot results in increased performance of white clover. In this study, we aimed to (i) assess the relationship between taproot volume and taproot survival, and (ii) whether the timing of death of the seminal taproot influences the population dynamics of white clover varieties. In a two-year field experiment with 18 white clover varieties grown in monoculture and in mixture with Lolium perenne L, the taproot characteristics and population dynamics were studied. It was shown that taproot volume was positively correlated to both leaf size and taproot presence during autumn 2017, 1 year after sowing. The combination of the timing of death of the seminal tap root and the development of stolons seems to play a more important role in increasing the persistence of white clover than the absolute survival of the seminal taproot. Future research should focus on understanding the transition from a taprooted white clover to a stolonous white clover plant in relation to specific weather events such as winter frost conditions.","PeriodicalId":12767,"journal":{"name":"Grass and Forage Science","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gfs.12598","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48390310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Herbage and animal responses on continuously stocked ‘Ipyporã’ and ‘Mulato II’ brachiariagrasses 连续放养' Ipyporã '和' Mulato II '腕足草对牧草和动物的反应

IF 2.4 3区农林科学

Grass and Forage Science Pub Date : 2022-11-15 DOI: 10.1111/gfs.12595

Ana Paula da Silva Carvalho, Leandro F. Domiciano, Isadora G. N. Paraíso, Débora S. M. Silva, Luciano S. Cabral, Lynn E. Sollenberger, Dalton H. Pereira, Bruno C. Pedreira

{"title":"Herbage and animal responses on continuously stocked ‘Ipyporã’ and ‘Mulato II’ brachiariagrasses","authors":"Ana Paula da Silva Carvalho, Leandro F. Domiciano, Isadora G. N. Paraíso, Débora S. M. Silva, Luciano S. Cabral, Lynn E. Sollenberger, Dalton H. Pereira, Bruno C. Pedreira","doi":"10.1111/gfs.12595","DOIUrl":"10.1111/gfs.12595","url":null,"abstract":"New hybrid grass cultivars may enhance animal performance in forage-livestock systems if they possess traits that address edaphoclimatic challenges and pest susceptibility. The objective was to assess herbage accumulation, plant-part composition, nutritive value, and animal performance of ‘Ipyporã’ [Brachiaria ruziziensis Germ. & Evrard × B. brizantha (Hochst. ex A. Rich.) Stapf] and ‘Mulato II’ (B. ruziziensis × B. brizantha × B. decumbens Stapf) hybrids in the Brazilian Amazon biome. From May 2016 to May 2018, pastures were maintained under continuous stocking with variable stocking rates to maintain canopy height at 30-cm. Herbage accumulation (HA) was greater in Mulato II (17,370 kg dry matter [DM] ha−1 year−1) than Ipyporã pastures (14,930 kg DM ha−1 year−1) across the years. In Year 1, Mulato II had greater stocking rate (1685 vs. 1215 kg body weight [BW] ha−1) and greater gain ha−1 (1130 vs. 850 kg) than Ipyporã. However, in Year 2, both cultivars had similar plant and animal responses. The Year 1 ADG was similar among cultivars or seasons but in Year 2, rainy seasons had 21 and 77% greater ADG than dry seasons for Mulato II and Ipyporã, respectively. Both cultivars can contribute to the diversification of pasture-based livestock systems in humid tropical regions. Mulato II presented superior performance when soil moisture and fertility were not limiting (i.e., Year 1). However, both cultivars provide similar plant and animal responses in Year 2, offering viable alternatives for the diversification of pasture-based livestock systems in the Amazon Biome.","PeriodicalId":12767,"journal":{"name":"Grass and Forage Science","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48208749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0