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通过 8 112×关 17 1、晋单 2 7两个玉米品种六种密度试验的各生育期株高及成株期穗部性状调查 ,用量化指标对玉米田间整齐度、单株生产力和群体产量之间的关系进行了分析。结果表明 :玉米田间整齐度在玉米生育进程中有逐渐提高的趋势 ;株高整齐度与单株生产力呈极显著正相关 ,8112×关 17- 1的相关系数r为 0 92 74 ,晋单 2 7的相关系数r为 0 92 14 ,二者均随密度的提高而降低 ;群体产量首先服从于密度的压力 ,不同的品种 ,其密度极限值不同 ,8112×关 17- 1的适宜密度为 6 75万株 hm2 ,晋单 2 7的适宜密度为 6万株 hm2 ;在相同密度条件下 ,整齐度与群体产量呈极显著正相关 ,相关系数r=0 96 6 5 。
Through 8 112 × OFF 17 1, Jin Dan 2 7 two kinds of maize varieties six density test of each growth period of plant height and adult ear panicle traits investigation, quantitative indicators of maize field uniformity, plant productivity and population yield The relationship between the analysis. The results showed that the uniformity of maize field tended to increase gradually in the process of maize growth. There was a significant positive correlation between the uniformity of plant height and plant productivity, the correlation coefficient r of 8112 × OFF 17-1 was 0 92 74, 7, the correlation coefficient r is 0 92 14, both of which decrease with the increase of density. The yield of population first obeys the pressure of density and the variety of different varieties, the density limits are different, and the suitable density of 8112 × OFF 17-1 is 6 750000 hm2, Jindan 27 suitable density of 60,000 hm2; under the same density conditions, uniformity and population yield was significantly and positively correlated, the correlation coefficient r = 0 9665.