人们往往认为凡是杂草都是有害的,因而有草必除.除得越干净越好。这种传统的农业措施沿用了几千年。杂草除光了.消灭了种间斗争,而且还能给果树提供一批压青材料,表面看来增加了果园的有机肥料,其实并未提高果园内的土壤养分含量,反而由于土壤暴露.使土壤水分蒸发加剧。特別是在台风季节,由于过量的雨水冲刷,使比较肥沃且生物活动比较活跃的表 People tend to think that all weeds are harmful, so there must be some grass, and the cleaner the better. This traditional agricultural measure has been in use for thousands of years. Weeds in addition to eliminating the fight between species, but also to fruit trees to provide a number of pressure-sensitive materials, the surface appears to increase the organic fertilizer orchard, in fact, did not increase soil nutrient content in the orchard, but due to soil exposure. So that the evaporation of soil moisture worsened. Especially in the typhoon season, due to excessive rainfall erosion, the more fertile and more active biological activity of the table