不同株型玉米高产群体的质量指标

在黔西北山区特定生态条件下，采用裂区设计，对繁凑型、半紧凑型、平展型三种株型玉米品种的密度及产量结构、叶面积系数、干物重、光合势、净同化率、光能利用率、经济系数等主要群体质量指标进行了研究。结果表明，紧凑型玉米3638的高产群体密度为4100～4900株

Study on quality index ofhigh yield colony of different plant types of corn

In the special ecological condition of mountain area of north-west Guuizhou. Using split plot design, the quality indexes of colony of three different plant types maize were studied. The results show that the best density of the high yield colony structures of compact 3638 is 4 100-4 900 plants per 66.7 m2. The main quality indexes of 3638 are maximum LAI(3 - 4),dry matter aecumulation (1 400 -1 420 kg·667 m-2),total LAD(14- 18 104m 2·d·667m-2),NAR(6.2-7.3g·m-2.d-1),utilization rate of light energy (1.47% - 1.50% ),economic eoefffieient (0.57-0.58). The best density of the se mi-compact S9914 is 4 100 - 4 900 plants per 667m2. The main quality indexes of S9914 are maximum LAI (3.9-4.4), dry matter accumulation (1 380 kg·667 m-2), total LAD (20-22 104 m2·d.667 m-2),NAR(4.7-5.3 g·m-2·d-1), utilization rate of light energy (1.11%-1.15%),economic coefficient(0.44- 0.50). The best density of the plate Bidan 4 is about 4 100 plants per 667 m2. The main quality indexes of Bicdan 4 are maximum LAI (5.2) ,dry matter accumulation (1 300-1 350 kg· 667 m-2), total LAD (26 104m2·d·667m-2) ,NAR (4.8 g·m-2·d-1, utilization rate of light energy (1.15%), economic coefficient (0.44)