苜蓿种子生产需水规律及其需水量预测预报模型的研究

Study on water requiring regulation and prediction model of alfalfa seed production

通过分析影响作物需水量的因素,依据水分在土壤-作物-大气连续体(SPAC)的运移规律和农田水量平衡原理,找出不同灌溉条件下产种苜蓿Medicago sativa各生育阶段的需水规律,确立了苜蓿种子高产稳产的关键需水期,初步得出北疆地区产种苜蓿的作物系数Kc,建立了以潜在蒸散量(ET0)为指标的苜蓿种子生产需水预测预报模型ET=Kc.ET0。

Factors affecting crop water requirement were analyzed, alfalfa water requiring regulation was determined according to soil-crop-atmosphere movement and water balance rule in crop field. The key stage of water requirement for high and stable alfalfa seed production was established. The prediction model of water requirement for alfalfa seed production in northern.