安宁河干旱河谷区不同类型农用地土壤抗冲性及与土壤性质关系OACSTPCD

[Objective]The aims of this study are to reveal the variation characteristics of soil anti-scourability of different types of agricultural land in the Anning River arid valley,and to elucidate the main soil factors affecting soil anti-scourability of agricultural land in the Anning River arid Valley,and to provide scientific basis for the prevention and control of soil erosion in the agricultural land.[Methods]Eucalyptus economic forest(EEF),potato cultivated land(PCL),pastoral land(GL),abandoned land(AL)and green pepper garden(GPG)were taken as the research objects,the undisturbed soil flume scour method was used for soil anti-scour tests,and soil samples were collected to determine soil properties.Pearson correlation and stepwise regression analysis between soil anti-scour coefficient and soil properties were carried out.[Results](1)During the 15 min flushing process,the sediment content of runoff decreased sharply with the extension of flushing time and then leveled off and stabilized.The anti-impact coefficient increased with the increase of scour time,and the logarithm,inverse function or linear function could be used to fit the relationship.The flushing resistance of the five selected types of agricultural soils decreased in the order:GL＞EEF＞GPG＞AL＞PCL.(2)The soil properties of agricultural land were mainly affected by human activities.The soil properties of GL and EEF were good,AL and PCL were poor,and GPG was in between,and the stability of agglomerates showed the sequence:GPG＞GL＞EEF＞AL＞PCL.(3)Correlation and stepwise regression analysis showed that soil impact resistance was mainly influenced by soil mechanical composition and water-stable agglomerates,and the optimal regression equation was described as:soil impact resistance coef-ficient=84.016-1.135 ×＜0.25 mm water-stable agglomerates-7.413 × clay particles.[Conclusion]This study shows that the soil resources of cultivated land in the arid valley area of the Anning River are seriously endangered by tillage and the soil quality is seriously reduced,and the soil resistance and soil properties of garden land are relatively poor,so the attention and protection of cultivated land and garden land resources should be strengthened.