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采用 31 1 - A最优混合设计 ,研究了西农 1 1号杂交种施肥量及密度和产量之间的关系。结果表明 ,在一定范围内 ,产量随密度和施肥量增加而增加 ,其中密度对产量作用最大 ,施氮量次之 ,施磷量最小 ;在中等肥力土壤上要获得 90 0 0～ 1 0 80 0 kg/hm2 的目标产量 ,应留苗 52 50 0～ 60 0 0 0株 /hm2 ,施氮肥 93.75kg/hm2 以上 ;若施氮肥 562 .5kg/hm2 ,并配施适量磷肥 ,留苗 63750株 /hm2 ,可望获得 1 0 80 0 kg/hm2以上的高产
Using 31 1 - A optimal hybrid design, the relationship between fertilizer amount and density and yield of Xong nong 1 1 hybrid was studied. The results showed that within a certain range, the yield increased with the increase of the density and the amount of fertilization. The density had the greatest effect on the yield, followed by the nitrogen application and the minimum phosphorus application. On medium fertility soils, the yield was 90 0 0 ~ 80 80 The target yield of 0 kg / hm2 should be 52 50 0 ~ 60 0 0 0 plants / hm2 and nitrogen fertilizer 93.75 kg / hm2 or above. If applying nitrogen fertilizer 562.5 kg / hm2 and applying appropriate amount of P fertilizer, / hm2, is expected to get more than 1 0 80 0 kg / hm2 more than high yield