太湖地区稻麦轮作系统中氮肥效应的研究  

Studies on the nitrogen fertilizer application of rice-wheat rotation system in Taihu Lake Region

作　　者：晏娟[1,2] 尹斌[2] 张绍林[2] 沈其荣[1] 朱兆良[2] 

机构地区：[1]南京农业大学资源与环境科学学院,江苏南京210095 [2]中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室,江苏南京210008

出　　处：《南京农业大学学报》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)

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.

关 键 词：氮肥 适宜施氮量 水稻 小麦 

分 类 号：S147.2[农业科学—肥料学]