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为了解膜下滴灌棉田盐分空间分布规律,通过在新疆生产建设兵团121团6连试验站大田试验,采用描述性统计方法,分析了不同连续年份和不同土层深度的土壤盐分空间分布特征。研究结果表明,在0~20cm土层,土壤含盐率相差不大,基本保持在3g/kg以下,属于非盐化土;土壤盐分主要分布在40~100cm土层,含盐率基本都在4g/kg以上,属于轻盐化土和中度盐化土;随着种植年限的增加,40~100cm土层含盐率逐渐减小,产生一定的脱盐现象;试验区总含盐率随种植年限增加呈逐渐减小趋势,说明长期膜下滴灌棉田区域保持适当的洗盐水量(秋浇),棉花种植是可持续的。
In order to understand the spatial distribution of salt content in drip irrigation cotton field, the spatial distribution characteristics of soil salinity in different continuous years and different depths of soil were analyzed by the descriptive statistics method in the field test of 6-unit test station at 121 Mission of Xinjiang Production and Construction Corps. The results showed that the salinity rates of soils in 0 ~ 20cm soil layer did not differ much and remained below 3g / kg, which belonged to non - salty soil. The soil salinity mainly distributed in 40 ~ 100cm soil layer, 4g / kg, which belongs to the light saline soil and moderate saline soil. With the increase of planting years, the salt content of 40 ~ 100cm soil layer gradually decreased, resulting in some desalination; The increase of years showed a gradual decreasing trend, indicating long-term film drip irrigation cotton fields to maintain appropriate amount of salt water (autumn pouring), cotton planting is sustainable.