摘要
在油菜——水稻两熟制田进行了连续两年的土壤耕作试验,其结果表明,耕作方式对田间耕层的土壤容重、孔隙度、土壤含水量和土壤氮、磷、钾含量及作物产量都有较大的影响。多季连续少免耕会降低作物产量。
A field experiment was conducted during 1988～1990,in a rape- rice two harvest field to study the change of crop yield and soil physical and chemical character under four soil tillage systems.It was showed the yield of rape and rice and soil bulk density,soil porosity,content of soil water,available nutrients in ploughing layer were greatly affected by tillage method.It is unsuitable to hold long practice for reduced-tillage and no-tillage.
关键词
耕作法
产量
土壤性状
耕层构造
Tillage system
crop yield
structnre of ploughing layer
soil available nutrient
