论文部分内容阅读
通过盆栽试验研究2种灌溉方式下土壤水分、盐分、氮素分布特征及对棉花生长的影响进行了研究。对土壤水盐的监控结果表明:土壤水分、盐分分布受灌溉方式影响显著,滴灌处理水分下渗较深,使盐分主要分布在30cm以下土壤,同时由于覆膜减少蒸发,有效的抑制了土壤返盐,在距滴头纵向30cm、水平15cm范围内根区形成脱盐区,棉花根系更容易获得生长所需水分、养分,因此棉花比浇灌处理生长旺盛。
Pot experiments were conducted to study the distribution of soil moisture, salt, nitrogen and their effects on cotton growth under two irrigation patterns. The monitoring results of soil water and salinity show that the distribution of soil moisture and salinity are significantly affected by the irrigation mode. The drip irrigation has a deeper infiltration of soil moisture, which causes the salinity mainly distributed in the soil below 30cm. Meanwhile, the film reduces the evaporation and effectively inhibits soil return Salt, in the vertical distance from the dripper 30cm, the level of 15cm within the root zone to form desalination zone, cotton roots more easily obtain the growth of water, nutrients, so cotton grow stronger than watering.