一.引言实施牧草田耕作制的主要目的,在於维持并提高农作物的产量,要维持及提高农作物的产量首先注意土壤结构的改良,而土壤结构的改良又必须混播多年生禾本科牧草及豆科牧草,然後能达成此目的。禾本科牧草與豆科牧草相混播两者不可缺其一,因为多年生禾本科牧草與豆科牧草的根系各有不相同的生长形态,对土壤的改良上亦各有不同的作用。多年生禾本科牧草的根系多为须状,能以它的细 I. INTRODUCTION The main purpose of implementing the pasture cultivation system is to maintain and increase the yield of crops. To maintain and increase the yield of crops, first pay attention to the improvement of the soil structure, and the improvement of the soil structure must be mixed with perennial grasses and legumes. , then you can achieve this goal. Both grasses and leguminous grasses must be mixed together, because the roots of perennial forage grasses and forage legumes have different growth patterns, and they also have different effects on soil improvement. The roots of perennial grasses are mostly beardlike and can be fine