红三叶和鸭茅混播草地综合管理优化模式的研究

选择牧草播种期、混播草地中禾本科和豆科牧草混合比例、施氮肥量、施氮肥量和刈割次数5个管理因子，建立红三叶和鸭茅混播草地参数回归模型，并由引进行产量分析和计算机仿真寻优，建立该草地综合管理优化模式，确定最佳的管理因子和水平。分析结果表明，该草地以3月份播种、禾草混播比例75％、施氮肥和磷肥量分别为0．15t/hm^2、刈害3次效果较好。

A study on optimal model for comprehensive management in mixture pasture of red clover and orchardgrass

Five management factors which included time of sowing, seeding rate of grass/legume, the level of N and P fertilizer application and cutting frequency were selected to set up the regression model in mixture pasture of red clover and orchardgrass. The relationship between herbage yield and management factors was analyzed by means of these modeling. According to modeling, finally optimal management plan was determined using computer. The result indicated that the best plan in the pasture was to sowing in March, 75% seeding rate of grass, both 0.15 t/hm 2 N and 0.15 t/hm 2 P fertilizer application, and cutting 3 times.