【摘要】 在西藏那曲地区选择了初始体重为11.64±0.73kg的周岁龄高原型藏山羊公羊,研究春季补饲精料对增重、采食量和经济效益的影响,试验采用单因子试验设计分为四个处理:三个补饲组(放牧+补饲)和一个对照组(全放牧),每个处理12个重复.结果表明,三个补饲组日增重分别为47、45和45g/d,极显著高于对照组(-2g/d/头)(P<0.01),补饲组间差异不显著(P>0.05);三个补饲组采食量分别为134g/d、108g/d和131g/d,组间差异不显著(P>0.05);补饲组可以获得12.38～14.80元/头的收益.在青藏高原高寒草地,春季牧草青黄不接、自然放牧藏山羊普遍掉膘的情况下,通过补饲精料不但可以提高增重、缩短饲养周期、减少载畜量、获得良好的经济效益,而且可以减轻草场的压力,有利于青藏高原生态安全屏障的建设.更多还原

【Abstract】 Forty-eight one-year old male Tibetan goats of plateau type with an initial body weight (IBW) of 11.64±0.73 kg are used to study the influence of supplementary concentration on body gain, feed intake and economic benefit in Nakchu Prefecture of Tibet. Single factor design is used in the experiment with four groups: three supplementary feeding groups (grazing + supplementary concentrate) and one control group (full grazing), and each treatment includes twelve pens of one goat. The results shows that daily weight gains are 47g/d, 45g/d and 45g/d in three supplementary treatments, respectively, markedly higher than control treatment (-2 g/d) (p<0.01). The average daily feed intake of the three supplemental treatments are 134g/d, 108 g/d, 131g/d, respectively, and no difference among them(p>0.05). The average economic benefit is 12.38～14.80 yuan RMB per goat in three supplementary groups after subtracting feed cost. It suggests that supplementary concentration could improve Tibetan goats’ body gain, decurtated feeding cycle and grazing capacity, produce good economic benefit, lessen the pressure of grassland and profit the construction of ecologic safe barrier in Qing-Tibet Plateau.更多还原