摘要
按 2个 3× 3的拉丁方设计研究了利用舔砖进行多营养补充对黄牛氮平衡和草料营养物质消化率的影响。结果表明 :多营养补充可明显改善黄牛的增重速度 (P<0 .0 1)和饲料转化率 (P <0 .0 5) ,使黄牛的日增重在单喂稻草、氨化稻草和干草的基础上分别提高了2 4 .99%、16 .12 %和 2 2 .92 % ;可提高牛对草料中 DM、OM、CP、NDF和 ADF等成分的摄入量并减少这些成分的粪中排泄量 ;显著 (P<0 .0 5)提高草料中 DM、OM、NDF和 ADF的消化率和极显著 (P<0 .0 1)提高 CP的消化率 ;明显改善黄牛的氮平衡 ,显著 (P<0 .0 5)增加氮的摄入量和存留量 ,极显著 (P<0 .0 1)提高氮和蛋白质的利用率。
Two 3 ×3 Latin Square experiments were carried out to examine effects of supplementary feeding with multinutrient blocks on digestibility of the major nutrirent components and nitrogen equilibrium in Xiangnan bullocks. The results showed that multinutrient blocks increased growth rate (P<0.01) and feed efficiency (P<0.05) of the bullocks. The daily gain of the cattle fed with the blocks was increased by 24.99%, 16.12% and 22.92% than those fed with rice straw, ammoniated rice straw and hay, respectively. The blocks also increased the cattle’s intake and digestibility of DM, OM, CP, NDF and ADF in the forages and decreased amounts of the above major nutrient components excreted. The nitrogen intake, nitrogen retention and net protein utilization of the bullocks fed with multinutrient blocks were also improved significantly (P<0.05 or P<0.01). The experimental results illustrated that feeding cattle with multinutrient blocks as supplement was one of the effective methods to increase cattle productivity.
出处
《草业学报》
CSCD
2000年第1期79-85,共7页
Acta Prataculturae Sinica
基金
国家自然科学基金项目!(39470524)
湖南省重点攻关项目!(01-961-09-02)
关键词
黄牛
草料
营养补充
氮平衡
消化率
cattle
forage
multinutrient supplement
multinutrient blocks
digestibility
