北方旱作区土壤轮耕技术研究进展
Research Advance in Soil Rotational Tillage on Dry Farming Areas in Northern China

旱作农业土壤耕作技术力求纳秋水、抗春旱，但长期单一的耕作措施使中国北方旱作区土壤结构恶化、土壤水分和养分效损失加重，导致土壤肥力严重下降。合理组合土壤耕作措施，建立适宜的翻、松、免等轮耕技术体系对于旱作农田健康有序发展具有重要意义。为深刻理解土壤轮耕技术的研究现状及目前研究中存在的问题，评析轮耕技术的土壤水肥效应及与作物的响应，阐述土壤轮耕的研究性状、轮耕技术与配套机具,同时就其存在问题提出相应建议，并对未来的研究方向进行了展望，旨在为中国北方旱作农业区土壤轮耕技术的研究和发展提供参考。
After harvest of the crops,soil tillage technologies were used by farmers to conserve more autumn rainfall and resist spring drought in dryland,but the long-term single tillage practice in dry farming areas of northern China reduced soil porositym decreased availability of soil water and nutrients,finally,it caused soil degradation. It was very important for farmers to build the rotational tillage technology system such as no-tillage,moldboard plowing and subsoiling.In the development of farmland in try farming areas for understanding the current status of the soil rotational tillage technology and the problems in recent research.The water-fertilizer effects and response of the crops under rotational tillage technology in dry farming areas were analyzed in the paper. Meanwhile, the research status and advance as well as the accompanying implements for rotational tillage were also expounded.Finally,several problems about supercritical chelating extractionhad been discussed,development trends in the future had been suggested for reliable references.