摘要
Ninety lactating goats (Bachthao, Barbary, Beetal and Jamnapary breeds) were used in an experiment to investigate the replacement value of the tree fodders Flemingia (Flemingia macrophylla) and Jackfruit (Artocarpus heterophyllus). The foliages were used to replace the concentrate in diets based on chopped whole sugar cane (Sacharatum sp.), Para grass (Brachiaria mutica) and dried cassava root (Manihot esculanta). The concentrate was replaced by foliage of Jackfruit or Flemingia at 0%, 20%, 40%, 60% and 80% based on the crude protein (CP) content in the concentrate and foliages, respectively. Average milk yield was 1,617 g/day for goats fed Jackfruit compared to 1,532 g/day for those fed Flemingia. Increasing amounts of Flemingia foliage resulted in reduced dry matter intake and decreased milk yield but milk composition (CP, casein and fat content) was similar up to 60% replacement. Flemingia showed a poor potential as a supplement for lactating goats and replacement levels should not exceed 20% of the protein in the concentrate or 7.5% of the dry matter in the diet. With respect to the combination of milk production and net return over the control a CP replacement rate of 20% was the most promising. For Jackfruit there was similar feed intake and milk yield at a replacement level of 20% of CP in the concentrate (9.2% of DM intake) compared to the control diet. Milk yield at the level of 40% replacement (15% of the DM) in the diet was slightly reduced. Up to a level of CP replacement rate of 60% (21% DM in the diet) can be suggested for on-farm testing as a higher net return over the control was obtained on station.
摘要译文
用90只泌乳山羊（Bachthao，Barbary，Betal和Jampanapary品种）进行实验，以研究树木饲料Flemingia macrophylla和波罗蜜（Artocarpus heterophyllus）的替代价值。在切碎的全甘蔗（Sacharatum sp。），巴拉草（Brachiaria mutica）和木薯干（Manihot esculanta）的基础上，用树叶代替日粮中的浓缩物。以浓缩液和叶中粗蛋白（CP）的含量分别为0％，20％，40％，60％和80％，用菠萝蜜或火烈鸟的叶子代替浓缩物。饲喂波罗蜜的山羊的平均牛奶产量为1,617克/天，而饲喂弗莱明贾的山羊的平均牛奶产量为1,532克/天。 Flemingia叶子的数量增加导致干物质摄入减少，牛奶产量下降，但牛奶成分（CP，酪蛋白和脂肪含量）的替代率高达60％。 Flemingia显示出作为哺乳山羊的补充剂的潜力不大，替代水平不应超过浓缩物中蛋白质的20％或饮食中干物质的7.5％。对于牛奶产量和净回报的综合控制，CP替代率为20％是最有希望的。对于波罗蜜，与对照日粮相比，浓缩物中CP的替代水平为CP的20％（DM摄入的9.2％）时，采食量和牛奶产量相似。日粮中替代率40％（DM的15％）的牛奶产量略有降低。在农场试验中，建议将CP替代率提高到60％（日粮中DM含量为21％），因为在现场获得了比对照组更高的净回报。
Mui, Nguyen Thi;Ledin, Inger;Uden, Peter;Binh, Dinh Van;. The Foliage of Flemingia (Flemingia macrophylla) or Jackfruit (Artocarpus heterophyllus) as a Substitute for a Rice Bran - Soya Bean Concentrate in the Diet of Lactating Goats[J]. Asian-Australasian Journal of Animal Sciences, 2002,15(1): 45-54