Corn silage supplementation for dairy cows grazing annual ryegrass at two pasture allowances

被引:3
|
作者
Miguel, M. F. [1 ]
Delagarde, R. [2 ]
Ribeiro-Filho, H. M. N. [1 ]
机构
[1] Univ Estado Santa Catarina, Lages, SC, Brazil
[2] INRA, PEGASE, St Gilles, France
关键词
dairy cow; corn silage; grazing; pasture allowance; supplementation; HERBAGE INTAKE; MILK-PRODUCTION; ITALIAN RYEGRASS; MAIZE SILAGE; YIELD; TIME; SUBSTITUTION; RESPONSES; BEHAVIOR; SYSTEMS;
D O I
10.1590/1678-4162-9795
中图分类号
S85 [动物医学(兽医学)];
学科分类号
0906 ;
摘要
Corn silage supplementation for dairy cows grazing in temperate annual pastures has rarely been investigated. The aim of this study is to compare two supplementation levels (0 and 4kg dry matter [DM]/day of a 7:1 mixture of corn silage and soybean meal) in dairy cows strip-grazing annual ryegrass (Lolium multiflorum Lam.) at two pasture allowances (PA, low= 25 and high = 40kg DM/d at ground level). The study was carried out according to an incomplete 4 x 3 Latin square design, using 12 cows and three experimental periods of 12 days. The green leaves allowances were only 4.9 and 8.5kg DM/d at the low and high PA, respectively. The total DM intake and milk production increased in supplemented cows compared to un-supplemented cows at the low PA, but were similar between supplementation levels at the high PA. The PI was unaffected by the PA, whereas the substitution rate was 0.68 in cows at the low PA and 1.35 in cows at the high PA. Corn silage supplementation may improve the total DM intake and milk production of dairy cows grazing in temperate annual pastures, but only at a low PA.
引用
收藏
页码:1037 / 1046
页数:10
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