水分胁迫对膜下滴灌复播玉米生长及产量的影响

Effect of Water Stress on Growth and Yield of Multiple Cropping Corns Under Drip Irrigation Under Mulch

以新玉9号玉米品种为试验材料,通过大田膜下滴灌试验,设置不同的水分下限,研究不同水分下限对复播玉米生长指标、干物质和产量的影响。结果表明:复播玉米的生长指标与水分胁迫的程度密切相关,轻度水分胁迫处理具有较高的株高和叶面积;随着水分胁迫的进一步加剧,生育后期干物质累积变慢;当土壤含水量低于田持的50%时,水分胁迫对复播玉米的生长和产量造成了较大影响,后期复水后也不会出现补偿效应。通过对产量和耗水量分析,得出土壤含水量控制在田持的60%左右,为复播玉米生育期适宜的土壤水分控制下限,在该条件下可以达到节水增产的效果。试验结果可为新疆地区复播玉米膜下滴灌节水增产提供参考依据。

Using ‘Xinyu 9 ’ maize as the test material, the field is set different moisture lower limit under the condition of drip irrigation under mulch to study water stress on the growth index, dry matter and yield of muhiple cropping corn. The results show that the growth indexes of multiple cropping corns are closely related to the water stress; mild water stress can get the plant height and leaf area higher; with more stronger water stress, the dry matter accumulation in later growth stage is slower; water stress has grea ter effect on the growth and yield of maize when the soil water content is lower than 50% of the field capacity; the compensation elfeel will not work even after rehydration. Through analysis of the production and water consumption, it can be found that the value of 60% of the field capacity is the optimum soil moisture lower limit during the growth period of muhiple cropping corn, and the effect of saving water and increasing yield can be get under this condition. The research result provides a reference for the water saving of multiple cropping corns under drip irrigation under mulch in Xinjiang region.