Rumen Fermentation and Performance of Lactating Dairy Cows Affected by Physical Forms and Urea Treatment of Rice Straw
Rumen Fermentation and Performance of Lactating Dairy Cows Affected by Physical Forms and Urea Treatment of Rice Straw
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DOI：
10.5713/ajas.2013.13094
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发表时间：
2013-09-01
期刊：
影响因子：
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通讯作者：
Anantasook, N.
中科院分区：
文献类型：
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作者：
Gunun, P.;Wanapat, M.;Anantasook, N.
本研究的目的是确定稻草的不同物理形态和尿素处理对采食量、瘤胃发酵和产奶量的影响。根据 4x4 拉丁方设计，将四头初始体重 (BW) 为 409 +/- 20 kg 的泌乳中期经产荷斯坦杂交奶牛随机分配，接受四种饮食治疗。膳食处理如下：未处理、长形稻草（LRS）、尿素处理（5%）、长形稻草（5% ULRS）、尿素处理（2.5%）、长形稻草（2.5% ULRS）和尿素处理（2.5%）、切碎（4 cm）稻草（2.5% UCRS）。奶牛饲喂精料，精料与产奶量的比例为1:2，稻草随意饲喂。研究结果表明，使用长形和短形尿素处理稻草可显着提高总干物质摄入量和消化率 (p0.05)，同时发现瘤胃 NH3-N、BUN 和 MUN 有所增加 (p
The aim of this study was to determine the effect of different physical forms and urea treatment of rice straw on feed intake, rumen fermentation, and milk production. Four, multiparous Holstein crossbred dairy cows in mid-lactation with initial body weight (BW) of 409 +/- 20 kg were randomly assigned according to a 4x4 Latin square design to receive four dietary treatments. The dietary treatments were as follows: untreated, long form rice straw (LRS), urea-treated (5%), long form rice straw (5% ULRS), urea-treated (2.5%), long form rice straw (2.5% ULRS) and urea-treated (2.5%), chopped (4 cm) rice straw (2.5% UCRS). Cows were fed with concentrate diets at a ratio of concentrate to milk yield of 1:2 and rice straw was fed ad libitum. The findings revealed significant improvements in total DM intake and digestibility by using long and short forms of urea-treated rice straw (p0.05), whereas ruminal NH3-N, BUN and MUN were found to be increased (p