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玉米是单产较高的粮食作物,高产潜力很大。其产量因子效应的充分发挥,除由本身各器官遗传基因决定外,更主要是受满足其生理生长需要的外界条件的影响。其中未充分利用有效的热量资源、密植额度不适、肥料投入少且不合理、土壤供肥保肥能力差等限制因素的矛盾更为突出,制约了玉米产量的提高。本项研究从玉米系统形态生理指标的变化情况,分析了高产玉米适宜的密植额度范围,供生产应用参考。
Corn is a higher yield of food crops, high yield potential. The full effect of its yield factors, in addition to the genetic factors of their own organs, but mainly to meet the needs of their physiological growth of the external conditions. Among them, the contradictions among the limited factors, such as insufficient effective utilization of heat resources, improper planting quotas, less and unreasonable input of fertilizers and poor fertility of fertilizers for soil, have restricted the improvement of corn yield. In this study, the morphological and physiological indicators of maize system changes, the appropriate range of high-yielding corn density analysis for production and application of reference.