摘要
以太湖地区的常熟市为试验区，选择不同土壤类型的农田，设置不同氮肥水平田间小区试验与微区试验，对稻麦轮作下作物产量的氮肥效应及田间适宜施氮量进行了研究。结果表明，无论是水稻，还是小麦，随施氮量增加，作物氮肥农学利用效率均下降。2年多点田间试验结果显示，该地区水稻的区域平均适宜施氮量为（176±24．2）kg·hm^-2，小麦为（228±27．1）kg·hm^-2。研究结果还表明，在该地区大义黄泥土上，水稻（品种4007）兼顾生产、生态和经济效益比较合理的施氮最为171～204kg·hm^-2。
To investigate the effect of N application rate on crop yield and the optimal nitrogen fertilizer application rates to rieewheat rotation system in Taihu Lake Region, several field experiments and micro-plot experiments were conducted with different N application rates under different soil species and crop cuhivars in Changshu City. The results obtained were as follows. No matter rice or wheat, agrnnomic efficiency of applied N decreased rapidly with the increased N rates. The results from five field experiments in two years evidenced that the regional optimal nitrogen fertilizer application rate of rice was at （ 176 ± 24. 2） kg.hm^-2, and of wheat at （228 ±27.1 ） kg.hm^-2. The ecological and economical satisfactory application rate of nitrogen fertilizer on rice （cuhivar 4007） ranged within 171 -204 kg.hm^-2 on Dayi Huangni soil in Taihu Lake Region.
出处
《南京农业大学学报》
CAS
CSCD
北大核心
2009年第1期61-66,共6页
Journal of Nanjing Agricultural University
基金
江苏省重大科技攻关项目(BE2005369)
关键词
氮肥
适宜施氮量
水稻
小麦
nitrogen fertilizer
optimal nitrogen application rate
rice
wheat
