冀北高原土壤干旱及抗旱土壤耕作法研究

本文指出，冀北高原气候干燥、多风少雨、土壤粗骨、松散贫瘠是土壤干旱的基础因素，而人为不合理的耕垦、利用，激发、加剧了土壤的干化过程。采用沟垄种植，垄部覆膜，沟部松耕，立茬越冬的少耕抗旱耕作法可有效拦截降水，阻隔水分蒸发，改善土壤营养条件，促进作物根系发育，作物产量提高18.54-23.51%，2米土体水分利用率由4.05公斤/毫米*公顷提高到4.65公斤/毫米*公顷。

Soil Drought and Anti-drought Tillage Methods in the Plateau of Hebei Province

By analysing the reasons of soil drought in the plateau of Hebei Province,it was concluded out that the principles and technologies of soil tillage can be applied to improving the soil moisture and nutrient environments in the region.Dry and windy climate,sandy and poor soil are the main reasons of soil drought and unrationally reclaiming wasteland and land utilization had intensified the processof soil drought.The experiments conducted in this region showed that reduced tillage with strip subsoiling,furrow planting and mulching increased soil water retaining capacity and crop root growth.As a result crop yield was increased by 18.54-23.51% than conventional tillage,soil water use efficiency in the top layer of soil (2m) was increased from 4.05kg/mm. ha to 4.65kg/mm.ha.