放牧强度对当年生混播草地和绵羊生产性能的影响  

Effects of Grazing Intensity on Mixed Pasture Growing in Same Year and Sheep Production Performance

作　　者：赵相勇[1] 孟军江[1] 周礼伦 

机构地区：[1]贵州省草业科学研究所,贵州贵阳553006 [2]贵州省毕节试验区生态畜牧业发展中心,贵州毕节551700

出　　处：《西南农业学报》2011年第4期1543-1546,共4页Southwest China Journal of Agricultural Sciences

基　　金：贵州省科学技术基金项目"贵州喀斯特山区草地生态系统健康评价体系研究"[黔科合J字(2008)2074];贵州省农科院人才项目"贵州人工草地放牧生态系统健康评价体系研究"(黔农科合08010);科技厅创新能力建设项目"牧草良种繁育及高效栽培技术创新能力建设"[黔科合院所创能(2009)4013]

摘　　要：为探讨贵州岩溶山区人工草地不同放牧强度与草地植物产量和放牧家畜生产性能之间的关系,研究了贵州喀斯特高寒山区混播草地建植4个月后,不同放牧强度对植物高度、盖度、频度、密度、生物量和绵羊生产性能的影响。结果表明:放牧明显抑制禾本科杂草马唐及多年生草黑麦草和鸭茅的生长,但对白三叶和草地有毒有害植物西伯利亚蓼的生长有促进作用。放牧强度为中牧有利于改善草地比例,草地单位面积畜产品产出率高,兼顾了畜产品和草地的生态平衡。The effects of different grazing intensity on the plant height, coverage, frequency, density, biomass and sheep production perform- ance after the pasture growing for four months in Karat alpine-cold mountain in Guizhou province were studied to explore the relationship among grazing density, biomass and livestock production performance. The results showed that grazing significantly inhibited the growth of Digitaria sanguinalis of Gramineae weeds,Lolium perenne and Dactylis glomeiata,but increased the growth of Trifolium repens and Polygonum sibiricure of noxious plants. Moderate grazing improved the ratio of meadow, increased the ratio of lives weight per unit area and availed the lives weight and ecological balance of meadow.

关 键 词：放牧强度 绵羊 生产性能 混播草地 植被特征 

分 类 号：S812.8[农业科学—草业科学]