Monthly Animal-feed Balance Model for the Qinghai-Tibetan Plateau
To improve current feed-animal balance research methods in China,a representative model for the Qinghai-Tibet plateau was set,taking alpine meadow in Tianzhu as a case study.The results suggested that the present overgrazing rate in Tianzhu was 42.9％ ; there was an annual grass drv matter deficit of 244.45 × 106 kg and crude protein deficit of 12.22 × 106 kg to meet livestock demands.The current condition of monthly feed-animal balance was that grassland can satisfy the demand of livestock from June to October.In November,grass dry matter supply wanes,although crude protein had a deficit from December until the next May.To satisfy the demands of all livestock,it was estimated that 789.04ha of alfalfa and 9708.52ha oats must be planted,whilst 138.94× 106 kg of barley or rape straw must be imported from external sources to feed all livestock.At present,refinement of the inter-month characteristics in the feed-animal balance model reduced deviation,which provides an annual standard to improve the supply of animal demand in Tianzhu.
NETL
NSTL
万方数据
维普
