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污水在农业灌溉中的回用是一种有效的节水途径,但长期应用会导致土壤斥水性的提高。本研究以以色列西南部Berry的原状土壤为例,研究了8种不同污染程度的灌溉用水对土壤斥水性的影响,并用统计分析方法从多个水质参数中找出主要的影响因素。结果表明,土壤斥水性与综合水质指标F值具有很高的相关性,相关系数为0.957,呈极显著正相关;多元回归分析发现,水质中有机质含量指标化学需氧量(COD)是影响土壤斥水性的最主要因素,其次是浑浊度(Turbidity),它们与土壤斥水性建立的多元回归方程的相关系数达0.997。仅用化学需氧量(COD)与土壤斥水性建立关系,相关系数为0.877。这为进一步研究土壤斥水性和节水灌溉提供理论依据。
Sewage reuse in agricultural irrigation is an effective water-saving approach, but long-term application leads to increased soil water repellency. Taking Berry undisturbed soil in southwestern Israel as an example, the effects of irrigation water with different pollution levels on soil water repellency were studied in this study. The main influencing factors were found out from several water quality parameters by statistical analysis. The results showed that the soil water repellency had a high correlation with F value of comprehensive water quality index, and the correlation coefficient was 0.957, which showed a very significant positive correlation. Multivariate regression analysis showed that COD (organic matter content) The main factor of water repellency, followed by the turbidity (Turbidity), the correlation coefficient of multiple regression equation established with soil water repellency reached 0.997. The relationship between chemical oxygen demand (COD) and soil water repellency was established only with a correlation coefficient of 0.877. This provides a theoretical basis for further research on water repellency and water saving irrigation.