土壤容重和含水量对耕作阻力的影响  

Effect of Soil Bulk Density and Moisture Content on the Draft Resistance

作　　者：李汝莘[1] 高焕文[1] 苏元升[1] 

机构地区：[1]中国农业大学

出　　处：《农业工程学报》1998年第1期81-85,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：农业部中澳合作课题

摘　　要：土壤容重和含水量是影响机具耕作阻力和能量消耗的主要因素。为了研究它们之间的数量关系，在田间将土壤容重和含水量分别在１．１～１．７ｇ／ｃｍ３和１１％～１９％的范围内取三个水平，进行靴式开沟器耕作阻力的正交试验。用改进的五轮仪测试开沟器的工作阻力和开沟深度，土壤容重和含水量，采用容重环法实行定点测试。试验数据用改进的Ｍａｒｑｕａｒｄｔ法，通过ＴＳＰ统计软件进行回归分析，得到了土壤耕作阻力－容重－含水量数学模型，并具有较高的拟合精度，可以用于分析评价不同土壤容重和含水量条件下拖拉机的牵引效率和能量消耗。The soil bulk density and moisture content are main factors influencing the draft resistance and power consumption of tractors.In order to study the quantitative relationship among them,three soil bulk density levels and three moisture content levels were determined within the limits of 1.1～1.7 g/cm 3 and 11 %～19 % in the field respectively. The perpendicular tests of the resistance of shoe opener were designed. The tillage resistance and depth of shoe opener were measured by using the improved fifth wheel gauge and the DT 100f Datataker, and the soil bulk density and moisture content were measured by the bulk ring at the same time in the field. The test data were analysed through the Marquardt non linear curve fitting technique and a model representing the relationship among draft resistance, soil bulk density and moisture content was proposed. It has higher fitting precision and can be used to estimate the energy consumption and the draft efficiency under different soil conditions.

关 键 词：土壤耕作 牵引阻力 土壤容重 土壤含水量 

分 类 号：S341.1[农业科学—作物栽培与耕作技术]