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

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.