Silage and milk production: a comparison between four rates of groundnut cake supplementation of silage of high digestibility
作者:
M. E. CASTLE,
W. C. RETTER,
J. N. WATSON,
E. ZEWDIE,
期刊:
Grass and Forage Science
(WILEY Available online 1977)
卷期:
Volume 32,
issue 1
页码: 43-48
ISSN:0142-5242
年代: 1977
DOI:10.1111/j.1365-2494.1977.tb01410.x
出版商: Blackwell Publishing Ltd
数据来源: WILEY
摘要:
AbstractGrass silage made in late May from S24 perennial ryegrass was offered to twelve Ayrshire cows in a 16‐week feeding experiment. The silage had a DM content of 25.3%, a pH of 3.91, and contained 16.8% CP and 68.4% digestible organic matter in the DM. The silage was fedad libitumand was the sole feed in the control treatment. In the other three treatments the silage was supplemented with a cube offered at rates of 0.8, 1.4 and 2.0 kg per 10 kg milk. The cube contained 82.2% groundnut, plus molasses and minerals, and had 37.9% CP in the DM. The daily intake of silage DM was 11.4 kg per cow on average over the four treatments which did not differ significantly. The mean daily milk yields were 14.8 kg per cow in the control treatment, and 16.5, 18.2 and 18.4 kg in the 0.8, 1.4 and 2.0 kg supplement treatments respectively. The SNF, CP and lactose contents of the milk were Wghest on the 1.4 kg supplement treatment. It is concluded that with a high digestibility silage, there is little evidence to support the feeding of more than 1.4 kg of high‐protein cubes per 10 kg milk in the declining phase of lactat
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