【摘要】 应用三因素最优设计构造试验方案,研究氮肥、磷肥、钾肥不同水平与组合对苜蓿产量的动态关系。结果表明,磷肥对产量的影响最大,其次氮肥较小,钾肥最小。产量大于850 kg/667m2为优域,在63套方案中,在本试验条件下,苜蓿产量大于850 kg/667m2的农艺措施为:施氮肥5.524~7.805 kg/667m2、磷肥10.86~12.856kg/667m2、钾肥0.583~3.749 kg/667m2。更多还原

【Abstract】 The 3-factors optimum design experiment was conducted to investigate the dynamic relation between different levels and combinations of nitrogenous,phosphate and potassium fertilizers and yield of alfalfa.The results showed that the influence of phosphate fertilizer to yield was the largest,that of nitrogenous fertilizer was the second,and that of potassium fertilizer was the smallest.The optimum range of alfalfa yield was larger than 850 kg/667 m~2.In the 63 sets of scheme under test condition,the agronomic measures for the yield of more than 850 kg/667m~2 was: nitrogenous fertilizer 5.524～7.805 kg/667m~2,phosphate fertilizer 10.86～(12.856) kg/667m~2,and potassium fertilizer 0.583～3.749 kg/667m~2.更多还原