放牧生态系统草畜间供与求的动态特征

随着季节的变化,牧草生产改变着家畜食料及转化摄取食料的能力,在春、夏、秋季绵羊食物的粗蛋白质含量分别高于草地牧草的15.99%、0.43%和2.71%。在冬季两者的含量几乎相等。但粗蛋白质食入量在春季比夏、秋、冬季分别多21.98%、40.40%和352%。干物质食入量在秋季比夏、冬、春季分别多17.64%、38.33%和72.23%,从而导致冬、春两季绵羊因食物不足而体重下降。

Dynamics of Grazing Ecosystem between Plant output and Animal Production

Dynamics of grazing ecosystem was about the interaction with plant and animal production,herbage output that changed with the season had effect on the animal feed and the capacity of transforming the food to animal nutrition.During the spring summer and autumn,the content of the herbage was separately more 15.99%、0.43% and 2.7% than of the grass lived on the land.However the protein content was lower in the winter. The protein intake in spring was more 22.3% of that during the summer.The protein content of herbage was the highest during the spring,but the DM intake of the sheep was fewer,which resulted in the loss of weight during the winter and spring.