【摘要】 试验采用四因素三水平正交设计的方法,研究了影响玉米高产的品种、密度、施氮量、施磷量之间的关系,得到了陕北沟谷地春玉米7 650 kg.hm-2的最佳农艺措施组合方案。在本试验条件下,四项农艺措施对产量的影响顺序为密度>品种>施氮量>施磷量,最佳农艺措施组合为密度6.00万株.hm-2,纯氮330 kg,纯磷138kg,品种3 819。生育期指标试验结果表明,四因素中品种对生育期影响达到显著水平。研究结果可作为类似地区春玉米高产栽培的参考。更多还原

【Abstract】 Four factors and three levels with orthogonal design was used in this experiment.We studied the relationship between the four factors that had influence on spring corn yield,densities,varieties,nitrogen fertilizer doses and phosphate fertilizer doses,and achieved the optimum combination scheme of agronomic measures of the yield of 7 650 kg·hm-2 in the field of northern Shaanxi plateau.Under the experimental conditions,the sequence of four agronomic measures,according to the effects on corn yield,was densities > varieties > nitrogen fertilizer doses > phosphate fertilizer doses.The best agronomic measure combination was 6 ×104 per hm2 seedlings,applying 330 kg pure nitrogen,138 kg pure phosphorus,and 3 819.The results also showed that there was significant difference(P<0.05)in growth period between varieties.This could be a reference to the high-yield cultivation of spring corn in similar dryland.更多还原