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基于野外大田试验,用灰色关联分析法和土壤水分入渗模型研究了裸地(CK)及不同种植年限压砂地土壤水分入渗规律。结果表明,土壤水分入渗能力依次为:新砂地>中砂地>老砂地>裸地(CK),入渗初期新砂地入渗能力明显高于中、老砂地及裸地,压砂地入渗速率新砂地最高,中砂地、老砂地次之。裸地土壤水分入渗过程呈指数负相关,压砂地土壤水分入渗均呈幂函数负相关,土壤累积入渗量随着时间的推移呈幂函数正相关,相关系数介于0.976~0.996,Horton模型与Kostiakov模型均可描述压砂地土壤水分入渗规律,可以代表压砂地土壤水分入渗模型。根据灰关联度的大小,土壤水分入渗能力依次为:新砂地(1.000)>中砂地(0.756)>老砂地(0.729)>裸地(0.622)。
Based on the field experiments, the soil infiltration patterns of bare land (CK) and sand land under different planting years with gray correlation analysis and soil water infiltration model were studied. The results showed that infiltration capacity of soil infiltration was as follows: new sandy land> middle sandy land> old sandy land> bare land (CK). The infiltration capacity of new sandy land was significantly higher than that of middle and old sandy land, The new highest sand, sand, sand and sand second. The infiltration process of soil moisture in bare land showed an exponential negative correlation. The infiltration of soil water in the sandy land showed a negative correlation with power function. The cumulative infiltration of soil showed a positive power function correlation with time, with a correlation coefficient ranging from 0.976 to 0.996. Horton Both the model and the Kostiakov model can describe the law of soil moisture infiltration in the compacted sand so as to represent the soil moisture infiltration model in the compacted sand. According to the degree of gray correlation, the infiltration capacity of soil is as follows: new sand land (1.000)> middle sand land (0.756)> old sand land (0.729)> bare land (0.622).