玉米单交种西农11号的高产栽培措施研究

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

High-yielding cultivated measures on maize hybrid Xinong 11

The optimum mixture design 311A is used to study the relationship between yield and cultivated measures,including nitrogen-phosphorus rates and density of population in maize hybrid Xinong 11.The results show that yield increases along with upward density and fertilizer rates in a certain scope,but the contribution of density to the yield is the most and of phosphorus rates the smallest.In order to obtain the yield from 9 000 to 10 800 kg/hm2,it is necessary to ensure a density ranging from 52 500 to 60 000 plants/hm2 and nitrogen 93.75 kg/hm2 in middle fertility field.It is possible to obtain the yield of over 10 800 kg/hm2 with nitrogen 562.5 kg/hm2,density 63 750 plants and moderate phosphorus.