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为了确定不同作物种植对土壤抗剪强度的影响,以辽宁省摩云山小流域为研究对象,分别采集大豆地、玉米地、果树地和果树台田样本等土样。测定土壤含水量,利用直剪法测定土壤黏聚力和内摩擦角,分析同一种作物和不同作物的土壤剪切力与土壤含水量关系以及同一种作物和不同种作物的内摩擦角的关系。结果表明:土壤黏聚力玉米地(49.27kPa)>豆地(38.36kPa)>果树台田(30.00kPa)>果树地(28.36kPa);内摩擦角果树地(25.45°)>豆地(23.26°)>玉米地(20.24°)>果树台田(19.51°);玉米地的剪切力与豆地的剪切力、果树地的剪切力和果树台田的剪切力均有显著性差异;不同作物的土壤黏聚力和土壤含水量进行二次线性分析,拟合度较好。
In order to determine the effect of different crops on the shear strength of soil, soil samples from soybean fields, corn fields, fruit trees and fruit trees were collected from Mount Morunshan, Liaoning Province. The soil moisture content was determined. The soil cohesion and internal friction angle were measured by direct shear method. The relationship between soil shear force and soil water content of the same crop and different crops and the relationship between the internal friction angle of the same crop and different crops . The results showed that: soil cohesion corn (49.27kPa)> soybean (38.36kPa)> fruit trees (30.00kPa)> fruit trees (28.36kPa) °)> maize field (20.24 °)> fruit tree terrace (19.51 °); shear stress of corn field and the shear force of soybean land, shearing force of fruit tree ground and shearing force of fruit tree terraces Differences; Soil cohesion and soil moisture of different crops for the second linear analysis, better fitting.