高粱早熟杂交组合黑龙11A×七抗七施肥量研究

The Study on the Fertilization Amounts for the Early Mature Sorghum Hybrid Heilong 11A×Qikangqi

在晋中东山气候高寒的寿阳县北部，对适宜当地种植的高粱杂交组合黑龙11A×七抗七，采用氮、磷、钾、农肥四因素二次通用旋转组合设计进行了试验，经运算建立了施肥与产量的数学模型，得到氮、磷、钾、农肥的最佳经济施肥量为亩施纯氮17．4kg，P2O56．84kg，K2O2．8kg，农家肥787．5kg，此施肥量可获得高粱亩产量极大值358．31kg。以目前市场价格扣除施肥成本155．96元，每亩高架子粒产量的经济收入为345．67元。

The effects of four factors, nitrogen, phosphorous, potassium and compost were tested for thesorghum hybrid, Heilong 11A×Qikangqi in the northern part of Shouyang county which locates in easternhight elevate mountains of Jinzhong region. A mathematical model between the fertilization amounts andthe sorghum grain yield was established. It was revealed that the moot economical fertilization amounts permu were 17.4kg N, 6.84kg P2O5, 2.8kg K2O and 787.5kg compost. The maximun sorghum grain yieldY=358. 31kg can be obtained by these fertilization amounts. The net cash income per mu for thesorghum grain was 345 .67 yuan after the deduction of foe 155 .96 yuan for the fertilizer costs.