| Through field investigation, field measurement and sampling analysis, using SPSS and DPS software, ANOVA and multiple comparison analysis were made of salinity and soil texture in the irrigation areas of the lower reaches of Kaidu River. The results showed that the silt content of 0～10 cm layer was 62.65%, that of 10～30 cm layer was 60.31%, and that of 30～50 cm layer was 55.93%. The mean salt ions in the surface soil of 0～10 cm, 10～30 cm and 30～50 cm was SO42->CL->Mg2+>Ca2+. The different particle fractions of mechanical composition range of the coefficients of variation were 8%～62% in forest land, 4%～37% in cultivated land, 2%～40% in garden land, and 15%～52% in unused land. The coefficient of variation was high and total salt mean value of four land use types from high to low were respectively: unused land, cultivated land, garden land and forest land. Powder particles in different land use types were obviously different, and all layers were significant. Soil clay particle was significantly related to HCO3-, Cl- and SO42- (P<0.05). Soil powder was positively correlated to HCO3- (P<0.01). |