内蒙古主要灌区春小麦、春玉米农田优化灌溉指标研究

摘要

Based on field experiments, the relationship between soilrelative effective moisture content Ar and water consumption amount with yield was analyzed. Also the relationship of WUE with both irrigation amount and Ar in the crux period were studied. As a result, the optimal irrigation index for spring wheat and maize during different growth period in major irrigation area was proposed. They are seedling stage, booting-flowering stage and filling stage which is Ar 60%, 70% and 55% for spring wheat, an Ar 60%, 75% and 60% for spring maize respectively. In the meantime, the optimal water consumption, irrigation amount and Ar in high WUE for experimental crop were determined.%根据田间试验资料，在系统分析土壤相对有效含水量Ar和耗水量与产量、灌溉量与WUE及需水关键期Ar与WUE关系的基础上，提出适合内蒙古主要灌区春小麦、春玉米不同发育时期农田水分优化灌溉指标，即苗期、孕穗开花期和灌浆期春小麦的灌溉指标分别为Ar60%、70%和55%，春玉米的灌溉指标分别为Ar60%、75%和60%。同时给出了供试作物适宜耗水量、灌水量及WUE最高时的Ar等参数。