Frações proteicas do capim-mombaça submetido a doses de nitrogênio em duas alturas de corte

Silva, A. G; França, Aldi Fernandes Souza; Miyagi, Eliane Sayuri; Mello, Susana Queiroz Santos; Ferreira, Jorge Luís; Carvalho, Eduardo Rodrigues de

doi:10.1590/s0102-09352009000500018

Cited by 9 publications

(12 citation statements)

References 15 publications

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“…The results obtained in this study show that Mombasa grass as fodder has good composition of FDA, with less than 40% of dry matter irrespective of the dose and source of N. Regarding the CP, in both the rainy and dry seasons, there was an adjustment to the increasing linear function, i.e., increased N doses led to an increase in CP content ( Figure 2B and D). This corroborates the work of Silva et al (2009b) in a study of N doses (0, 100, 300, and 500 kg ha -1 of N) in Mombasa Guinea grass showing that in the dry and rainy seasons, increased N resulted in increased CP content, with values ranging from 6.5 to 10.6%. Nitrogen fertilization increased the concentration of N in Mombasa, which is directly related to the increase in CP content.…”

Section: Resultssupporting

confidence: 90%

“…Megathyrsus maximus) presents one of the greatest known potentials for production of dry matter (DM) in subtropical and tropical environments, and can reach annual dry matter production of approximately 33 t ha -1 (Freitas et al, 2007). Proper management of soil fertility and knowledge of the nutritional requirements of this grass are extremely important for the practice of pasture management and result in higher productivity and availability of food for animals (Silva et al, 2009b;Barth Neto et al, 2010;Silveira et al, 2010;.…”

Section: Introductionmentioning

confidence: 99%

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<b>Technical and economic viability and nutritional quality of mombasa guinea grass silage production

et al. 2018

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ABSTRACT. The objective of this study was to evaluate the viability of pasture with high production capacity and the potential for production of silage using different sources and doses of nitrogen (N) by quantifying the productivity of dry matter (DM), some qualitative characteristics, the total cost of production (TC) and total operating cost (TOC) of silage production. The experimental design was randomized block in a factorial scheme with four replications including two sources of nitrogen (urea and ammonium nitrate) and five N doses (0, 50, 100, 150, and 200 kg ha -1 by cutting). The increase in N provided greater DM and crude protein content and reduced the fiber content in neutral detergent. The source of N did not affect the chemical composition, and therefore, it is recommended to use urea due to the ease of acquisition and higher economic return. The production of Mombasa silage can be economically viable due to high DM and crude protein content combined with low production costs. The smallest TC and TOC were obtained in the absence of nitrogen fertilization; however, the proper management of N ensures high productivity in cattle feed with higher total profit when using 100 kg ha Viabilidade técnica, econômica e qualidade nutricional da produção de silagem de capimmombaça RESUMO. Objetivou-se estudar a viabilidade de uma pastagem com alta capacidade produtiva e o potencial para produção de silagem de capim, utilizando fontes e doses de nitrogênio (N), quantificando-se a produtividade de matéria seca (PMS), algumas características bromatológicas, o custo total de produção (CT) e o custo operacional total (COT) da produção de silagem. O delineamento experimental foi em blocos casualizados, adotando um esquema fatorial com quatro repetições, sendo duas fontes de nitrogênio: ureia, e nitrato de amônio, e cinco doses de N (0, 50, 100, 150 e 200 kg ha -1 por corte). O incremento de N propiciou maior PMS e teor de proteína bruta, além de diminuir os teores de fibra em detergente neutro. As fontes de N, não influenciaram na composição química, e desta forma recomenda-se utilizar a ureia em função da facilidade de aquisição e maior retorno econômico. A produção de silagem de capim-Mombaça pode ser economicamente viável em função da elevada PMS e proteína bruta, aliado ao baixo custo de produção. O menor CT e COT foi obtido na ausência da adubação nitrogenada, entretanto, o manejo adequado de N garante boa produtividade e rendimento na alimentação do rebanho, com maior lucro total obtido na utilização de 100 kg ha

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Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

<b>Technical and economic viability and nutritional quality of mombasa guinea grass silage production

et al. 2018

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“…According to Primavesi et al (2004), increase in N dose decreases the percentage of recovered nitrogen. In her work on Mombaça grass, Silva (2009) In spite of very close numbers, response by Castagnara et al (2011a) differs from that in current research. Although they did not report any difference in DM rates between the forage grasses under analysis, they detected an effect with regard to N doses evaluated (0, 40, 80, 120 and 160 kgha -1 ).…”

Section: Resultscontrasting

confidence: 76%

Production and chemical composition of hybrid Brachiaria cv. Mulato II under a system of cuts and nitrogen fertilization

Marques¹,

França²,

Oliveira³

et al. 2017

Biosci. J.

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ABSTRACT:The production capacity of green and dry mass of the entire plant, efficiency of N conversion, apparent N recovery and the chemical composition of cultivar Mulato II was evaluated under a system of cuts and nitrogen doses. The assay, conducted in the municipality of Goiânia, GO, Brazil, had a totally randomized 2 x 4 factorial design (2 height cuts, 0.40 and 0.50 m and 4 nitrogen doses), with three replications and subdivided subplots. Treatments comprised four N doses (0, 50, 100 and 150 kgha -1 N, with urea as nitrogen source). There was no significant interaction (p>0.05) between N doses and cut heights for the variables productivity of green (PGM) and dry (PDM) mass, nitrogen use efficiency (NUE) and apparent N recovery (ANR), which were neither affected (p<0.05) by N doses nor by evaluated cut heights. Average productivity reached 59,450 kgha -1 (PGV) and 10,367 kgha -1 (PDM) and it was produced an average of 19.62 kg of DM per kg of N, with a mean 56.00% recovery. N doses and cut heights did not affect (p>0.05) DM rates of the plant, whilst mean dry matter rate was 17.49%. CP rates were affected (p<0.05) by N doses (0, 50, 100 and 150 kgha -1 ) and cut heights (0.40 and 0.50 m) and by the interaction of these factors. CP rates of the entire plant hybrid Brachiaria cv. Mulato II increased (p<0.05) due to N doses through an increasing linear relationship. Since there was a significant effect (p<0.05) with regard to cut height and CP rates decreased with height increase. NDF rates were significantly influenced by N doses (p<0.05) and by cut heights (p<0.05), with significance for the interaction (p<0.05) of over 100 kgha -1 N doses only. No significant interaction (p>0.05) occurred in ADF rates among the variables analyzed. ADF contents were influenced by N supply (p<0.05) with decreasing quadratic regression as N doses increased.

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“…Nitrogen fraction B 2 (Table 2) corresponds to fraction B 3 of the fractionation proposed by Sniffen et al (1992) and is below the values observed by Balsalobre et al (2003) and by Silva et al (2009), who found that fraction B 3 varied from 41.7 to 32.2 g/100 g at 0.20 m height and from 44.5 to 30.8 g/100 g at 0.40 m height. Similar values (26.9 g/100 g) were observed by Malafaia et al (1999) for Tifton 85 cut at approximately 60 days of age.…”

Section: Resultscontrasting

confidence: 59%

Nutritive value of Tanzania grass for dairy cows under rotational grazing

et al. 2014

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-A nutritional analysis of Tanzania grass (Megathyrsus maximus Jacquin cv. Tanzânia was conducted. Pasture was managed in a rotational grazing system with a 30-day resting period, three days of paddock occupation and two grazing cycles. Ten Holstein × Zebu crossbred cows were kept within a 2-ha area divided into 11 paddocks ha -1 . Cows were fed 2 kg of corn meal daily and performance was evaluated by weighing the animals every 14 days and by recording milk production twice a day. Nutritional composition of the Tanzania grass was determined from forage (extrusa) samples collected by esophageal fistulae from two animals. The nutritive value of Tanzania grass was estimated according to a modification of the CNCPS evaluation model. Tanzania grass supplemented with 2 kg of corn meal supplied 33.2% more net energy for lactation than required by the animals to produce 13.7 kg of milk day -1 . Nevertheless, the amount of metabolizable protein met the daily protein requirement of the animals. Although the model used in the study requires adjustments, Tanzania grass has the potential to produce milk in a rotational grazing system.

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Frações proteicas do capim-mombaça submetido a doses de nitrogênio em duas alturas de corte

Cited by 9 publications

References 15 publications

<b>Technical and economic viability and nutritional quality of mombasa guinea grass silage production

<b>Technical and economic viability and nutritional quality of mombasa guinea grass silage production

Production and chemical composition of hybrid Brachiaria cv. Mulato II under a system of cuts and nitrogen fertilization

Nutritive value of Tanzania grass for dairy cows under rotational grazing

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