摘要
本文应用灰色系统理论中的灰色关联度分析法,对影响放牧绵羊生产性能的主要营养限制因素进行了研究。关联度分析结果表明,饲粮粗蛋白质水平是影响绵羊体重变化的主要营养因素,饲粮代谢能的影响次之;影响育成母羊羊毛生长速度的主要营养因素是其干物质采食量;而成年母羊羊毛生长的营养限制因素是饲粮粗蛋白质水平。影响绵羊采食量的主要营养因素是饲粮代谢能浓度,其次是牧草质量。影响牧草消化率的主要营养因素是绵羊瘤胃发酵水平,其次是牧草中的木质素含量。
In this paper, the grey system analysis were used to study the nutritional limitations affecting the productive performance of the grazing sheep. The results showed that crude protein level in the diet was the main nutrient limitation affecting liveweight gain of grazing sheep, and the dietary metabolic energy level came second. For the hoggs, the main nutrient limitation affecting their wool growth was dry matter intake(DMI), but the dietary crude protein level for adult ewes. The concentration of metabolic energy in the diet was the main nutrient limitation, and the second one was quality of pasture; The main limitation affecting total VFA production of the sheep was in vitro digestibility(IVD) of grass, and lignin content in the grass took second place.
关键词
灰色关联度分析
放牧绵羊
增重
羊毛生长
营养限制因素
Grey system analysis, Grazing sheep, Liveweight gain, Wool growth, Nutritional limitations
