Produtividade e composição estrutural de aveia e azevém submetidos a épocas de corte e adubação nitrogenada

Cassol, Luís César; Piva, Jonatas Thiago; Soares, André Brugnara; Assmann, Alceu Luiz

doi:10.1590/s0034-737x2011000400006

Cited by 15 publications

(11 citation statements)

References 8 publications

(9 reference statements)

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“…Longer biomass accumulation periods either in autumn or spring are vital for milk or meat production on pasture because they reduce forage shortages. In addition to sowing grass-legume consortia, other strategies are used ease forage shortages including staggering forage seeding times (Pin, Soares, Possenti, & Ferrazza, 2011) and cutting seasons (Cassol, Piva, Soares, & Assmann, 2015).…”

Section: Acta Scientiarum Animal Sciencesmentioning

confidence: 99%

<b>Production and chemical composition of grasses and legumes cultivated in pure form, mixed or in consortium

Tambara

Sippert

Jauris

et al. 2017

Acta Sci. Anim. Sci.

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ABSTRACT. The objective of this study was to assess the edible biomass and chemical composition of forages grown on pure form, as a grass mix, and in grass-legume consortia. The following species were tested: white oats (Avena sativa), black oats (Avena strigosa), ryegrass (Lolium multiflorum), forage peanut (Arachis pintoi), white clover (Trifolium repens), and red clover (Trifolium pratense). The experiment consisted of sixteen treatments arranged in a completely randomized design. The parameters measured were total dry matter (PMST), neutral detergent fiber (NDF), acid detergent fiber (ADF), and crude protein (CP). No significant differences in PMST were found among the consortia (p > 0.05). Only the pure cultivated white clover (p > 0.05) was comparable to the consortia in terms of biomass production. The three legumes had the lowest average NDF values (p > 0.05), based on their contributions to the total NDF content of the consortia along the cuts. The ADF content increased for all treatments during the cuts. The results indicate that in pasture, legumes increase protein content, and forage consortia increase both the pasture production and the grazing period. Their chemical composition is adequate for boosting livestock production in pastures.Keywords: Arachis pintoi, Avena sp., fiber, Lolium multiflorum, protein, Trifolium sp.Produção e composição bromatológica de gramíneas e leguminosas cultivadas de forma estreme, misturadas ou em consórcio RESUMO. Objetivou-se avaliar a produção de biomassa e a composição bromatológica ao longo do ciclo produtivo de forrageiras cultivadas de forma estreme, misturadas ou consorciadas. Foram utilizadas as seguintes espécies: aveia branca (Avena sativa), aveia preta (Avena strigosa), azevém (Lolium multiflorum), amendoim forrageiro (Arachis pintoi), trevo branco (Trifolium repens) e trevo vermelho (Trifolium pratense). As forrageiras foram cultivadas em 16 tratamentos em delineamento inteiramente casualizado, sendo analisados a produção de matéria seca total (PMST) e os teores de fibra em detergente neutro (FDN), fibra em detergente ácido (FDA) e proteína bruta (PB). Quanto à PMST, não foram constatadas diferenças (p > 0,05) entre os consórcios, sendo apenas o cultivo estreme de trevo branco comparável (p < 0,05) aos consórcios em biomassa produzida. Em relação ao FDN, as três leguminosas isoladas apresentaram os menores valores (p > 0,05) na média geral, ficando evidente a sua contribuição no teor de FDN dos consórcios ao longo dos cortes. O teor de FDA aumentou no decorrer dos cortes para todos os tratamentos. Os resultados indicam que a inclusão de leguminosas aumenta os teores proteicos, e os consórcios de forrageiras aumentam a produção de pastagem e o período de pastejo, com composição bromatológica adequada para potencializar a produção animal a pasto.

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Section: Acta Scientiarum Animal Sciencesmentioning

confidence: 99%

<b>Production and chemical composition of grasses and legumes cultivated in pure form, mixed or in consortium

Tambara

Sippert

Jauris

et al. 2017

Acta Sci. Anim. Sci.

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“…Lupatini et al (1998) affirmed that a utilization of 150 kg N ha -1 can result in an increase of up to 122% in the rate of accumulation of pasture dry matter. In addition, according to Cassol et al (2011), the use of nitrogen to produce an increase in dry matter makes it possible to anticipate the entry of grazing animals, promoting better pasture utilization and higher productivity.…”

Section: Resultsmentioning

confidence: 99%

“…There was a higher percentage of oat leaves in the pastures that received nitrogen fertilization, which produced the equivalent of 1015.8 kg DM more oat leaves per hectare than non-fertilized pastures. The higher yield of oat leaves is attributed to the positive effects of nitrogen through greater accumulation of biomass and changes in tiller dynamics, which resulted in a higher proportion of young tillers in the pasture (CAMINHA et al, 2010;CASSOL et al, 2011) and generated a higher proportion of leaves. In addition, according to Pellegrini et al (2010), a high percentage of leaves is also a result of the influence of nitrogen acting in zones of stretching and cell division, causing an increase in the number of cells and favoring the expansion and appearance of leaves.…”

Section: Resultsmentioning

confidence: 99%

Production and quality of Tifton 85 pastures overseeded with black oat: effects of irrigation and nitrogen fertilization

Filho

Paula

et al. 2018

SCA

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The objective of this work was to evaluate the effects of irrigation and nitrogen fertilization on the bromatological quality, forage production, and botanical and structural composition of Tifton 85 (Cynodon sp.) pastures overseeded with black oat (Avena strigosa). Four treatments were evaluated in a 2 × 2 factorial scheme (irrigated and non-irrigated × fertilized and non-fertilized), with three replicates, in a completely randomized design. In irrigated paddocks, the irrigation system was activated when the soil matric potential reached a value equal to, or higher than, 10 kPa and 135 kg N ha-1 was applied to fertilized paddocks, divided into four applications. The forage mass pre- and post-grazing, total forage production, and the botanical, structural, and bromatological composition of the pastures were evaluated. No interaction was observed between the irrigation and nitrogen fertilization factors for any of the variables and no significant differences were observed in forage mass between pre- and post-grazing or in Tifton leaf and stem percentages. Nitrogen fertilization had a significant effect on forage production, which was 2626.41 kg dry matter (DM) ha-1 higher in fertilized pastures than in unfertilized pastures. In addition, fertilization resulted in a lower percentage of dead material (6.66%), higher percentage of oat leaves (30.84%), higher leaf:stem ratio (1:45), higher crude protein content (24.13%), lower levels of neutral detergent fiber (NDF) (64.57%) and acid detergent fiber (ADF) (32.86%), and higher in vitro dry matter digestibility (73.01%) than in unfertilized pastures. The use of irrigation did not influence total forage production, however, it resulted in pastures with lower NDF (65.97%) and ADF (33.54%), and higher in vitro dry matter digestibility (73.48%) than unirrigated pastures. Nitrogen fertilization produced improvements in pasture structure, associated with higher dry matter yield and bromatological quality, while irrigation only produced pastures with lower fiber content and greater digestibility.

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“…Phyllochrons may be reduced with N fertilization because it increases the plant growth, resulting in bigger regrowth capacity, given to the plants a fast replacement of leaf area (Lemaire and Chapman, 1996). Cassol et al (2011) observed that with the utilization of nitrogen there was a greater amount of leaves produced by oats in 45 days than in 60 days without its use, noted that if N fertilization was not used in oats (Avena strigosa) and ryegrass (Lollium multiflorum) the plants needed 15 more days to accumulate a similar amount of dry matter than when N fertilization was used. This proves the influence of nitrogen in the production of citocinine, an hormone responsible for the plant growth and that acts activating of the process of cellular division and differentiation (Marschner, 1995).…”

Section: The Importance Of Nitrogen In Pasturesmentioning

confidence: 99%

The utilization of tropical legumes to provide nitrogen to pastures: A review

Gimenes¹,

Barbosa²,

Gerdes³

et al. 2017

Afr. J. Agric. Res.

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. In this context, the introduction of forage legumes in the pasture system is fundamental to fix nitrogen from the atmosphere and supply it to grasses, increasing its production and persistence, enhancing animal nutrition as it grazes, at the same time. Still, the use of plant mixes in the system brings further benefits to it, such as better utilization of fertilizers as well as enhances the nutrient cycle and soil coverage. However, there are still many gaps in our knowledge regarding intercropping legumes and grasses, especially the use of tropical legumes. The purpose of this review is compiles data about forage legumes as well as analyses them to find new tendencies and gaps on the knowledge to shed some lights on researches in this area. We also expect that this review will help researchers and producers to understand the role of forage legumes in a pasture system and that there will be an increase in its utilization worldwide, especially in the tropics, where nitrogen is easily leached and lost from the pastures. With emphasis on description of promising tropical legumes but still little used Arachis pintoi, Macrotyloma and Neonotonia whightii.

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Produtividade e composição estrutural de aveia e azevém submetidos a épocas de corte e adubação nitrogenada

Cited by 15 publications

References 8 publications

<b>Production and chemical composition of grasses and legumes cultivated in pure form, mixed or in consortium

<b>Production and chemical composition of grasses and legumes cultivated in pure form, mixed or in consortium

Production and quality of Tifton 85 pastures overseeded with black oat: effects of irrigation and nitrogen fertilization

The utilization of tropical legumes to provide nitrogen to pastures: A review

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