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在黔西北山区特定生态条件下 ,对紧凑型玉米 36 38高产群体结构进行了研究。结果表明 :36 38产量水平超过6 5 0kg/ 6 6 7m2 ,其密度为 410 0～ 490 0株 / 6 6 7m2 ,种植密度 (x ,千株 / 6 6 7m2 )与产量 (y,kg/ 6 6m2 )的回归方程为 y=6 0 9.86 5 8+ 6 17.3738x - 6 7.76 82x2 。产量结构为 40 0 0～ 45 0 0穗 /6 6 7m2 ,穗粒数 5 80～ 6 40 ,千粒重 315～ 32 5 g,最大叶面积系数3.0 8～ 4.0 1左右 ,总光和势为 (14.6 9～ 18.32 )× 10 4 ·d/6 6 7m2 ,,蜡熟期干物物质积累为 140 9～ 1432kg/ 6 6 7m2 ,平均净同化率为 6 .2 6～ 7.35g/m2 ·d ,光能利用率 1.47%～ 1.5 0 % ,经济系数 0 .5 7～ 0 .5 8。
Under the specific ecological conditions in the mountainous area of northwestern Guizhou Province, the population structure of 36 36 high-yielding compact maize was studied. The results showed that the yield of 36 38 exceeded 650 kg / 667 m2 and the density was 410 0-490 0 plants / 667 m2. The planting density (x, 1000 plants / 667 m2) and the yield (y, kg / 6 6m2) the regression equation is y = 6 0 9.86 5 8+ 6 17.3738x - 6 7.76 82x2. The yield structure was 40 0 0 ~ 45 0 0 spike / 6 6 7m 2, the spikelet number was 5 80 ~ 6 40, the 1000-grain weight was 315 ~ 32 5 g, the maximum leaf area coefficient was 3.0 8 ~ 4.0 1 and the total light- 9 ~ 18.32) × 10 4 · d / 6 6 7m 2. The dry matter accumulation at the ripening stage was 140 9 ~ 1432 kg / 6 6 7 m 2 with an average net assimilation rate of 6.26 ~ 7.35 g / m 2 · d. The light energy The utilization rate is 1.47% ~ 1.5 0%, and the economic coefficient is 0.57 ~ 0.58.