【摘要】：本試驗旨在研究飼糧中添加籽粒莧青貯和干草對泌乳奶牛瘤胃發(fā)酵、營養(yǎng)物質表觀消化率、血液指標和生產性能的影響。選取產奶量、胎次和泌乳天數等相近的健康荷斯坦奶牛45頭,隨機分成3組,每組15頭牛。對照組粗飼料包括全株玉米青貯、羊草和苜蓿干草,試驗Ⅰ組粗飼料使用籽粒莧青貯替代30%玉米青貯,試驗Ⅱ組粗飼料使用籽粒莧干草替代30%苜蓿干草。3組飼糧營養(yǎng)水平接近。預試期10 d,正試期60 d。結果表明:1)與對照組相比,試驗Ⅰ組能顯著提高粗蛋白質(CP)表觀消化率、瘤胃液氨態(tài)氮(NH_3-N)和血液總氨基酸(T-AA)的含量(P0.05),對其他營養(yǎng)物質表觀消化率、血液指標和乳成分影響不顯著(P0.05)。2)與對照組相比,試驗Ⅱ組的血液T-AA含量顯著高于對照組(P0.05),對其他血液指標、瘤胃發(fā)酵指標、營養(yǎng)物質表觀消化率和乳成分均無顯著影響(P0.05)。綜上所述,飼糧中添加適量的籽粒莧不會影響奶牛的生產性能,同時會提高牧場經濟效益。
[Abstract]:The purpose of this experiment was to study the effects of grain amaranth silage and hay on rumen fermentation, apparent digestibility of nutrients, blood index and production performance of lactating cows. A total of 45 healthy Holstein cows with similar milk yield, birth number and lactation days were randomly divided into 3 groups with 15 cows in each group. The forage of the control group consisted of whole corn silage, Leymus chinensis and alfalfa hay. In group I, seed amaranth silage was used instead of 30% corn silage. The forage of seed amaranth was used to replace 30% alfalfa hay in group 鈪，

本文編號：2382263