高产玉米栽培中的氮肥分期优化技术研究  

Qptimizing Nitrogen Application for Maize at Different Growth Stage under High Yield Cultivation

作　　者：肖焱波[1] 苏凡[2] 段宗颜[2] 

机构地区：[1]云南民族大学化学与生物技术学院,云南昆明650031 [2]云南省农业科学院农业环境资源研究所,云南昆明650205

出　　处：《农业现代化研究》2005年第2期141-144,共4页Research of Agricultural Modernization

基　　金：云南省自然科学基金(2004C0059M)。

摘　　要：1999—2000年在云南省祥云县草甸土壤上进行移栽玉米的不同水平氮肥试验研究,对移栽玉米在产量、氮素吸收及不同氮肥处理下土壤剖面中硝酸盐残留进行了研究。研究中发现祥云坝区玉米种植中农民习惯施但量明显偏高,在目标产量为1032kg/hm2时最佳施氮量为250kg/hm2,仅相当于农民习惯施氮量的45%。合理施用氮肥,无论对减少农民的投入,还是降低氮肥潜在的环境污染,都有不可忽视的意义。Field experiments had been carried out to optimize N rate for maize under high yield cultivation in the meadow loamy soil in Xiangyun County, Yunnan Province from 1999 to 2000.The yield of maize, nitrogen uptake during the whole growth season, and residual nitrate in soil profile had been investigated. The results showed that the farmers'traditional N application rate was much higher than what the maize required. With the target yield at 10 321 kg/hm^2, the optimal N rate should be 250 kg/hm^2, 45% of what the farmer had been applied. The optimal N application cannot be overridden either to reduce the farmers'input or decrease the threat from overuse of N to the environment.

关 键 词：氮肥 高产玉米 施氮量 移栽 栽培 目标产量 合理施用 农民 玉米种植 优化技术 

分 类 号：S513[农业科学—作物学] S511