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为了分析干旱区长期膜下滴灌棉田生育期初土壤水盐空间分布特征,在新疆石河子炮台镇试验区进行土壤取样,运用经典统计学方法分析了该试验区不同纵剖面土壤水盐分布特征。研究结果表明:各剖面土壤含水率值几乎相同,其对应的变异性属于中等偏弱性。各剖面土壤含盐率值差异却很大,土壤盐分的变异情况远大于土壤水分的变异情况。经过多年的膜下滴灌作用,在播种前土壤中的盐分逐渐累积在40~80cm土层,并且盐分慢慢控制在有利于作物正常生长的水平。
In order to analyze the characteristics of spatial distribution of soil water and salinity of soil at the beginning of growing period, the soil samples were collected in the test area of Fortress, Shihezi, Xinjiang. The distribution characteristics of soil water and salinity in different vertical sections of the experimental area were analyzed by classical statistical methods. The results show that the soil moisture content of each section is almost the same, and the corresponding variability belongs to moderate weakness. The difference of soil salt content in each profile is very large, and the variation of soil salinity is far greater than the variation of soil moisture. After years of drip irrigation under the membrane, the salt in the soil before sowing gradually accumulates in the soil layer of 40-80 cm, and the salt is slowly controlled at a level conducive to the normal growth of the crop.