密度和施肥水平对超甜玉米“双元600”产量及群体指标与生态因子的影响

Effects of different density and fertilizer supplying level on the yield, colony quality and physiological index of the super sweet corn “Shuang Yuan 600”

采用裂区和正交旋转组合设计方法,研究了密度、施肥水平对超甜玉米“双元600”的产量及产量结构,群体主要质量生理指标及生态因子的影响。结果表明;①密度为45 000株/hm2时,果穗产量与等级均高;②同一密度不同施肥水平产量差异极显著;③最佳产量时群体各生育期叶面积系数为:苗期1.08,拔节期1.61,大喇叭口期3.02,抽雄期3.98,乳熟期3.17;④产量最高的合理群体平均净同化率为3.95～5.33 g/(m3d)。

The split plot and regressive orthogonal rotary combination design were used to study the effects of different density and fertilizer supplying level on yield and its factors, colony quality and physiology index of the super sweet corn 揝huang Yuan 600? The results indicates: 1) was in the level of 45 000 plants per hm2 , both yield and class of were high;2) same density with different fertilizer supplying levels leads to remarkable different yields; 3) when the corn reaches the highest yield, the leaf area index in different growing stages are: 1.08 in seedling stage; 1.61 in jointing stage; 3.02 in ear merging stage, 3.98 in staminate flowing appearing, 3.17 in milk stage; 4) rational colony net assimilation rate in highest yield is 3.95～5.33 g/(m3d).