论文部分内容阅读
无效株是影响群体整齐度的重要因素 ,主要包括 :自交株、空秆、小穗株及病虫害株等。不同产量水平的玉米群体中无效株率不同 ,无效株率越低 ,产量越高。在高密度条件下高的单株产量乃是高产的重要前提。提高种子和耕种质量 ,留大、壮苗是降低群体无效株 ,提高群体及果穗整齐度的重要措施 ,是进一步挖掘群体增产潜力的重要保证。
Invalid strains are important factors affecting the uniformity of the population, including: selfing, empty stalk, spikelet and pest and disease strains. Different yield levels of corn population ineffective plant rate is different, the lower the rate of invalid plant, the higher the yield. High yield per plant under high-density conditions is an important prerequisite for high yields. Raising the quality of seeds and cultivation, leaving big and strong seedling is an important measure to reduce the ineffective strains of the population and improve the uniformity of the population and ears, which is an important guarantee to further tap the potential for increasing the yield of the population.