人工草地纯种短角肉牛放牧系统优化研究  

Optimization of shorthorn beef cattle grazing system on sown pasture

作　　者：蒋建生[1] 于应文[2] 蒋文兰[3] 赵仕峰[4] 耿文诚[4] 

机构地区：[1]广西大学动物科学技术学院,广西南宁530005 [2]兰州大学草地农业科技学院甘肃草原生态研究所,甘肃兰州730020 [3]甘肃省农业厅,甘肃兰州730020 [4]云南省种羊场,云南寻甸655204

出　　处：《草业学报》2003年第2期61-69,共9页Acta Prataculturae Sinica

基　　金：九.五"国家重点科技攻关项目"云贵高原草地畜牧业持续发展技术研究"(96-016-02-01)专题资助。

摘　　要：以云南省种羊场纯种短角肉牛群人工草地放牧饲养为对象,以年出栏100头种牛为目标,进行饲草预算和草畜动态平衡,充分利用人工草地的牧草生长量和营养物质,母牛怀孕后期适当补饲混合精料,全年牛群饲养量达375头,全年共需饲草料642.67t(DM),其中人工草地提供764t(DM),饲料地提供339t(DM)。经过优化牛群结构和饲草需求动态平衡,该系统尚有一定发展潜力。This study aimed at 100 heads of breeding cattle marketed annually. The shorthorn beef cattle were grazed on sown pasture in Yunnan sheep breeding farm. By making full use of pasture growth quantity and nutrient substances on sown pasture and supplementing mixed concentrate in late pregnancy duration of breeding cows, the number of beef cattle grazed in the whole year reached 375 heads. In order to keep the dynamic balance between the forage and beef cattle, a forage budget was worked out. The annual need of forages was 642.67 t (DM); the sown pasture could provide forages for 764 t (DM) and the forage cropping land-339 t (DM). It is suggested that the beef cattle grazing system has some potential in increasing carrying capacity through optimizing the cattle construction and balancing the forage requirement and supply.

关 键 词：人工草地 放牧系统 短角肉牛 草畜动态平衡 牛 群结构 饲草需求 

分 类 号：S812[农业科学—草业科学]