越冬期地面灌溉技术研究

Research on the Surface Irrigation Technique During Winter Season

基于越冬期大田土壤入渗和灌水试验,采用试验研究和模拟分析相结合的方法,分析讨论了冬灌水流运动特点,揭示了表征灌溉效果的各项指标随地中温度的变化特性,提出了提高越冬期灌溉灌水效果的5项技术:短畦灌溉技术、长畦灌溉技术、小流量灌溉技术、秋耕灌溉技术和最冷月免灌技术。研究结果对我国北方缺水地区冬季合理灌溉具有重要指导意义。

Based on the experiment of water infiltration into soils and surface irrigation in field during winter season, with a help of the research way combined experiment with simulation analysis, the movement characteristics of surface irrigation stream during winter season were analyzed and discussed, the variety peculiarity of the indexes expressing irrigation quality with soil temperature was opened out, five items of technical measures used for improving the irrigation effect during winter season were brought forward in this thesis. Those technical measures are the irrigation technique with short border, the irrigation technique under long border, the irrigation technique with a little entry flow, the irrigation technique under ploughed land and the avoider irrigation during coldest month. The investigation result has important meaning in instructing the surface irrigation during winter season in the china north area being short of water resources.