不同放牧强度下南方灌丛草地放牧山羊日增重及灌木日粮养分变化研究  

Studies on changes of goat daily gains and shrubby diet nutrients under different grazing intensities in southern shrubland of China

作　　者：万里强[1] 李向林[1] 袁庆华[1] 何峰[1] 吴维达[1] 

机构地区：[1]中国农业科学院北京畜牧兽医研究所,北京100193

出　　处：《草原与草坪》2013年第4期45-47,53,共4页Grassland and Turf

基　　金：公益性农业行业科研专项"不同区域草地承载力与家畜配置"(200903060)资助

摘　　要：研究了不同放牧强度下南方灌丛草地放牧山羊的生产性能。结果表明:放牧强度对山羊日增重的影响不显著(P>0.05),5月放牧,山羊的体重增加,轻牧和重牧条件下分别为209和226g/d,而7月和9月放牧,山羊的体重保持不变或出现下降趋势;5月放牧草地主要灌木植物的粗蛋白含量较高而粗纤维含量较低,灌木适口性较好;放牧山羊生产性能与其有效采食量有直接关系,而采食量则受特定季节内可食灌木植物营养价值的影响。A study on changes of production performance of goats was conducted under the different grazing intensities on the pastures in southern China. The results showed that the difference in effects of the grazingintensities on daily gains of goats was not significant （P〉0.05）. Goats weights were getting increased during grazing period in May with 209 g/d and 226g/d under light--grazing and heavy--grazing treatments respective- ly. Weights of goats remained unchanged or got to be decreased during grazing periods in July and September. The crude protein contents of shrubs were relatively high and the crude fiber contents were relatively low in May, so that their palatability was quite nice. There were a directly relation between the production performance of grazing goats and their effective intakes, and the intakes depended on the nutritional values of edible shrubby ants during certain seasons.

关 键 词：放牧强度 灌丛草地 山羊 灌木养分 日增重 

分 类 号：S812[农业科学—草业科学]