摘要
采用密度、氮肥、磷肥三因子二次饱和D -最优设计 ,筛选出 9× 10 3 ~ 1 0 5× 10 4kg·hm-2 的农艺方案为 :密度 5 190 0~6 0 75 0株·hm-2 ,纯氮 16 9 5~ 2 14 5kg·hm-2 ,纯磷 4 8~ 87kg·hm-2 ;高于 1 0 5× 10 4kg·hm-2 的农艺方案 :密度 6 0 75 0~ 6 5 70 0株·hm-2 ,纯氮 2 35 5~ 2 6 4kg·hm-2 ,纯磷 5 8 5~ 90kg·hm-2 .
The second degree saturation D optimum design with 3 factors(density,nitrogen and phosphorus)was used to sift the agronomic plan with 9×10 3~1 05×10 4 kg·hm -2 :density,51 900~60 750 plants·hm -2 ;N, 169 5~214 5 kg·hm -2 and p,48~87 kg·hm -2 ,which were higher than those of the agronomic plan with 1 05×10 4 kg·hm -2 :its density,N,P were 60 750~67 500 plants·hm -2 ,235 5~264 kg·hm -2 and 58 5~90 kg·hm -2 respectively
出处
《河南农业大学学报》
CAS
CSCD
2001年第z1期7-10,共4页
Journal of Henan Agricultural University
关键词
秦巴山区
春玉米
密度
氮肥
磷肥
Qinba mountain area
spring maize
density
nitrogen fertilizer
phosphorus fertilizer