红三叶和鸭茅混播草地综合管理优化模式的研究

A study on optimum model for comprehensive management in mixtured pasture of red clover and orchardgrass

选择牧草播种期、混播草地中禾本科和豆科牧草的混合比例、施氮肥量、施磷肥量和刈割次数五个管理因子 ,建立红三叶和鸭茅混播草地参数回归模型 ,并由此进行产量分析和计算机仿真寻优 ,建立该草地的综合管理优化模式 ,确定最佳的管理因子和水平。分析结果表明 ,对于该草地在 3月份播种、禾草混播比例 75%、施氮肥和磷肥量分别为 0 1 5t/hm2 、刈割

Five management factors were selected to set up the effect function modeling in mixtured pasture of red clover and orchardgrass,i.e. time of sowing,seeding rate of grass/legume,the level of N and P fertilizer application and cutting frequency.The relationship between herbage yield and management factors was analyzed through these modeling.Finally optimum management plan was determined using computer according to the modeling.The results indicated that the best plan in the pasture was to sowing in March,seeding rate of grass 75%,applying N and P fertilizer 0.15t/hm 2 and 0.15t/hm 2 respectively,and cutting 3 times.