论文部分内容阅读
通过在新疆巴楚县设置不覆膜露地种植、窄膜覆盖和宽膜覆盖种植棉花的试验，对露地、窄膜下、宽膜中区和边区下不同时间的土壤剖面上全盐含量的比较分析，发现覆盖宽膜后第一水前盐分在土壤剖面上是增加的，但膜中区０～１５ｃｍ盐分 增加量小于膜边区；到收获后膜中区０～１５ｃｍ土壤含盐量下降到低于播种时水平，可是在膜 边区０～１５ｃｍ盐分聚积，含盐量继续增加；到收获后宽膜下１５～１００ ｃｍ深度内含盐量均降低 到春季播种时水平．
The soil salt content in soil profile at different time in the open field, narrow zone, middle zone and marginal zone was compared by setting the planting without covering the membrane, covering the plant with wide membrane and covering the plant with wide membrane in Bachu County, Xinjiang Uygur Autonomous Region. It was found that the salt content of the first water before the water covered the broadfiella was increased in the soil profile, but the increase of salt content in the 0 ~ 15cm zone was smaller than that in the middle of the membrane. The salinity of 0 ~ 15cm soil in the middle of the membrane decreased to low after harvest When sowing, the salinity of 0 ~ 15cm accumulates in the edge of the membrane, and the salt content continues to increase. After salting, the salt content in the depth of 15 ~ 100 cm under the broadleaved membrane decreases to the level of spring planting.