固定道保护性耕作的试验研究  

Study on Controlled Traffic With Conservative Tillage

作　　者：李洪文[1] 高焕文[1] 陈君达[1] 李问盈[1] 

机构地区：[1]中国农业大学

出　　处：《农业工程学报》2000年第4期73-77,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：中国-澳大利亚合作项目课题!"旱地农业可持续机械化生产体系研究

摘　　要：通过压实试验 ,分析了无压实以及小型拖拉机、中型拖拉机和联合收获机压实等处理方式的土壤容重、入渗率和耕作阻力。在此基础上 ,进行了两年的固定道耕作试验 ,结果表明 ,机具随机进地行走会造成对土壤的严重压实 ,降低土壤水分入渗 ,增加作业能耗 ,而固定道能够改善土壤结构 ,提高土壤蓄水能力 ,减轻地表径流 ,提高土壤作业适时性和准确性 ,在目前固定道占地 2 0 %的情况下 。Soil bulk density,infiltration rate and tillage resistance were analyzed through compaction experiments with different treatments of non compaction, compaction with small tractor, compaction with middle tractor and compaction with combine. Results of two years controlled traffic experiments showed that, random traffic can bring severe compaction to soil, reduce infiltration, increase energy consumption, but controlled traffic can improve soil structure, increase soil moisture, reduce runoff and make field operation more timely and precise. Controlled traffic may occupy 20% land, but the yields can be kept at the same level.

关 键 词：固定道 保护性耕作 压实 降雨模拟 耕作阻力 

分 类 号：S34[农业科学—作物栽培与耕作技术]