饲用高粱营养价值及人工瘤胃降解特性

摘要

The aim of this study was to investigate the changes in nutritional value of four sorghum varieties of Hainiu,Big kahuna,Dajiang 3180,and Dajiang 1180 at different stages of development,in the Hexi saline-al-kali area of Gansu Province.The main nutrient components,in vitro digestibility,and in vitro fermentation gas production of the four varieties during branching period,jointing stage,and heading stage were determined by proximate analysis and in vitro gas production techniques.The results showed that the height and fresh weight of the four varieties were significantly different.Furthermore,a significant increase in the height and fresh weight of the four varieties was observed(P>0.05).The results also revealed that the fresh weight and ratio of stems to leaves of Hainiu was the highest,while those of Dajiang 1180 were the lowest with prolonged harvest.Further,the crude protein content in different parts of the same species was also different,in the order stem0.05).综合考虑来看,海牛和大卡具有较高的营养价值及饲喂价值,是优良的饲草品种,很适合在甘肃河西干旱盐碱地种植.