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控制土壤和地上部营养空间观察玉米生育和产量的结果表明 :改善空间因子使玉米增产 17 0 % ,而改善土壤因子仅使玉米增产 13 0 %。土壤和地上部营养条件对穗粒数的影响高于对千粒重的影响 ,开花以前土壤因子是决定生长的主要矛盾 ,而开花以后空间因子则是决定生长的主要矛盾。
The results of observing the fertility and yield of corn in the nutrition space of soils and shoots showed that improving the space factor increased the yield of corn by 17.0% and improving the soil factor alone increased the yield of corn by 130%. The effect of soil and aboveground nutrient conditions on grain number per spike was higher than that on 1000-grain weight. Before soaking, soil factors were the major contradictions in growth, but space factors after flowering were the main contradictions in growth.