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土壤水盐变化研究是干旱半干旱区土地科学和农业科学的重要研究内容之一。本文通过对棉田的野外土壤取样和实验室定量分析,结果表明灌溉方式对棉田土壤表层(0–20 cm)和次深层(40–60 cm)土壤含盐量的影响最大,其次是深层(60–100 cm)和根层(20–40 cm):漫灌使得土壤含盐量的最大值出现在深层(60–100 cm)或次深层(40–60 cm),而滴灌使得土壤含盐量的最大值出现在根层(20–40 cm)或次深层(40–60 cm)。同时,灌溉方式对土壤Cl-/SO42-也有影响:漫灌使其增大而滴灌则会使其先升后降,在棉花生长中期的7月份达到最大值,这意味着灌溉方式可能对棉田土壤的盐渍化类型具有一定的影响;最后本文还采用配对样本的非参数检验对灌溉方式导致的这种土壤含盐量差别的显著性进行了分析,认为这种差别在棉花的不同生长期的显著性有所不同。
Soil water and salt changes in the arid and semiarid areas of land science and agricultural science is one of the important research. In this paper, through field sampling and laboratory quantitative analysis of field soils in cotton field, the results show that irrigation has the greatest effect on the salinity of soils in the surface soil (0-20 cm) and secondary deep layer (40-60 cm), followed by the deep layer (60 -100 cm) and root layer (20-40 cm). The maximum soil salinity was found in the deeper layers (60-100 cm) or in the secondary layers (40-60 cm) The maximum appears in the root (20-40 cm) or in the secondary (40-60 cm). At the same time, the irrigation mode also affected soil Cl- / SO42-: flooding to make it increase and drip irrigation to make it rise first and then decrease, reaching the maximum in mid-cotton growth in July, which means that irrigation may affect soil The salinization type has a certain impact; Finally, this paper also paired samples of non-parametric test of irrigation methods lead to the salinity of soil salinity differences were analyzed, that difference in different growth stages of cotton Significance is different.