摘要
通过大田膜下调亏滴灌试验,测定了制种玉米叶面积指数、耗水量和产量等指标。结果表明,拔节—抽穗期缺水抑制了叶面积的生长,对产量负面影响极为显著,水分利用效率显著降低;灌浆—成熟期缺水对叶面积指数和产量影响甚微,而水分生产效率却显著提高,通过建立产量与叶面积指数以及叶面积指数与日耗水强度模型,提出了在抽穗期充分供水,苗期和成熟期减小供水、保持适度的水分亏缺的制种玉米节水高产水分调控模式。
Leaf area, water consumption and yield of corn were investigated with a field experiment of regulated deficit drip irrigation with plastic film mulched. The results showed that drought stress restrained leaf area（LAI） and yield significantly at jointing-tasseling stage, and the water use efficiency（WUE） was decreased under drought stress. The impact of drought stress to LAI and yield was very little at filling-mature, but WUE was higher than normal water supply. Through Y-LAI and LAI-ET/△↓t model, seed corn＇s soil moisture-controlling mode that means supply enough water to corn at tasseling stage, decrease water supply and maintain appropriate water deficit at maturity was proposed to achieve water-saving and high-yielding.
出处
《灌溉排水学报》
CSCD
北大核心
2009年第3期31-34,共4页
Journal of Irrigation and Drainage
关键词
制种玉米
产量
调亏滴灌
corn for seed
yield
regulated deficit drip irrigation
