论文部分内容阅读
南方高温多雨耕作区,在地面覆盖薄膜时对土壤环境的改善效果主要是如下两方面:1、维持土壤的松软性。2、防止土壤养分的淋溶流失。1、土壤松软性的维持南方高温多雨地区,因降雨多,导致土壤板结,通透性差,土壤中的气相小。为了补救它,就要经常中耕,给土壤补充空气,这些作业必然要耗费很多劳动力。但由于地面覆盖了薄膜,能防止雨水直接侵透土壤,被薄膜覆盖的畦面,土壤的松软性能够长久保持。过去已实证,在1000～2000毫
Southern high temperature and rainy farming area, when the ground cover film on the soil environment to improve the results are mainly the following two aspects: 1, to maintain soil softness. 2, to prevent soil nutrient leaching loss. 1, the maintenance of soft soil South high temperature and rainy areas, due to rainfall, resulting in soil compaction, poor permeability, the gas phase in the soil is small. In order to remedy this, we must constantly cultivate and replenish the soil with air, which inevitably consumes a lot of labor. However, due to the ground cover film, to prevent rain directly penetrate the soil, the film covered by the surface, the soil softness can be maintained for a long time. The past has been empirical, at 1000 ~ 2000 milliliters