Effects of levels of nitrogen on the milk production of cows in coast-cross pasture

被引：9

作者：

Alvim, MJ ^{[1
]}

Botrel, MD ^{[1
]}

机构：

[1] EMBRAPA, Ctr Nacl Pesquisa Gado Leite, BR-36038330 Juiz De Fora, MG, Brazil

来源：

PESQUISA AGROPECUARIA BRASILEIRA | 2001年 / 36卷 / 03期

关键词：

nitrogen fertilizers; grasses; grassland management; animal feeding; milk yield;

D O I：

10.1590/S0100-204X2001000300024

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

The purpose of this work was to evaluate the effects of three levels of nitrogen (N), 100, 250 and 400 kg/ha/year, applied in coast-cross (Cynodon dactylon (L.) Pers.) pasture on the milk production of Holstein cows during two lactation periods. The pasture was irrigated in dry season and used by rotational grazing. The experimental design was in randomized blocks, in split plots (plot = level of N; split plot = period of lactation), with two pasture replications and eight cows per treatment. The crude protein contents were similar (P>0.05) in the treatments. The stoking rates of pasture was lowest (P<0.05) in the lowest level of N. The milk production per day and per animal were similar (P<0.05) in the treatments. The milk productions per area were higher (P<0.05) in two highest levels of N. The milk production per kg of N applied was highest in the level of 100 kg/ha/year.

引用

页码：577 / 583

页数：7

共 13 条

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[2] Alvim MJ, 1997, REV SOC BRAS ZOOTECN, V26, P967
[3] Botrel Milton De Andrade, 1994, Revista da Sociedade Brasileira de Zootecnia, V23, P189
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[5] DAVIDSON TM, 1990, HIGH PROD PER COW SE, P1
[6] HERRERA RS, 1986, REV CUBANA CIENCIA A, V20, P180
[7] HERRERA RS, 1983, PASTOS CUBA, V2, P59
[8] INFANTE FP, 1983, PASTOS CUBA, V2, P565
[9] MARTINEZ RO, 1980, R CUB CIENCIA AGR, V14, P225
[10] National Research Council, 1987, PRED FEED INT FOOD P

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