小四轮拖拉机播前压地对土壤物理特性及作物生长的影响  

Effects on Soil Physical Porperties and Crop Growth by Small Wheeled Tractor CompactionBefore Winter Wheat Sowing

作　　者：李汝莘[1] 高焕文[1] 苏元升[1] 

机构地区：[1]中国农业大学机械工程学院

出　　处：《中国农业大学学报》1998年第2期65-68,共4页Journal of China Agricultural University

摘　　要：采用小四轮拖拉机在冬小麦种床上压地1遍，小麦播种后测定土壤的体积密度、含水率及温度，并与种床未经碾压的处理进行比较。结果表明：压实对20cm内耕层土壤的物理特性有一定的影响。尽管这种影响可以通过耕作来消除，但播前压实却会对作物的出苗或生长带来危害。The soil bulk density, moisture content and soil temperature are measured afterthe compaction of small wheeled tractor operated on the seed bed before winter wheat sowingand compared with the ones in unpressed zones. The result shows that the bulk density in 20cm of soil depth and the temperature in 0~30 cm depth considerably influenced by the traf-fic. These effects can be removed by tillage while the compaction is harmful to crop emer-gence and growth.

关 键 词：拖拉机 土壤压实 土壤物理特性 小四轮拖拉机 

分 类 号：S232.5[农业科学—农业机械化工程] S219.1[农业科学—农业工程]