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以春玉米为试验材料,通过防雨棚测坑种植,人工严格控制设置不同的土壤水分处理,研究不同水分处理对玉米植株生态指标、耗水量和产量的影响。结果表明,水分胁迫抑制了玉米的生长发育,高水分处理均具有较高的叶面积、株高及茎粗;轻度胁迫对各项指标影响不大,随着胁迫的进一步加深,各项生态指标均呈下降趋势;低水分处理产量明显降低,耗水量较小,后期植株衰老加速,成熟期提前;高水分处理存在奢侈性蒸腾蒸发,耗水量最高,产量低于轻度胁迫处理。通过产量与耗水量对比分析,确定当地春玉米适宜土壤水分指标控制下限。
Spring maize was used as test material to plant pits in rain-proof shelters. Different soil moisture treatments were manually set under artificial control to study the effects of different water treatments on ecological indicators, water consumption and yield of maize plants. The results showed that water stress inhibited the growth and development of maize. High water treatment had high leaf area, plant height and stem diameter. Mild stress had little effect on each index. With the further deepening of stress, Indicators showed a downward trend; low water treatment output was significantly reduced, water consumption is smaller, the late plant accelerated aging, early maturity; high moisture treatment there is a luxury transpiration evaporation, water consumption is highest, the yield is lower than the mild stress treatment. By comparing the yield and water consumption, the lower limit of soil moisture index control of local spring maize was determined.