| 太湖地区主要土壤上水稻氮素吸收利用的研究 |
| |
| 引用本文： | 赵洪涛,周健民,范晓晖,刘崇群.太湖地区主要土壤上水稻氮素吸收利用的研究[J].土壤,2006,38(2):153-157. |
| |
| 作者姓名： | 赵洪涛 周健民 范晓晖 刘崇群 |
| |
| 作者单位： | 中国科学院南京土壤研究所,南京,210008 |
| |
| 基金项目： | 中国科学院知识创新工程项目;国家自然科学基金 |
| |
| 摘 要： | 通过在太湖地区两种主要水稻土(黄泥土和乌栅土)上的田间小区试验,研究了水稻在不同N水平下对N吸收变化规律、N素表观利用率以及N肥的增产效果和经济效益。研究结果表明:水稻在两种土壤上的吸N速率均在分蘖结束后到开始孕穗即孕穗期最快,施N处理的吸N速率大约在N2.2~4.2kg/(hm2·d)。两种土壤不同施肥处理下化肥N利用率的变化范围在31.6%~46.2%之间,平均为37.6%。N肥最佳施用量黄泥土为N227kg/hm2,乌栅土为N255kg/hm2。
|
| 关 键 词： | 水稻土 氮素利用率 经济效益 |
Nitrogen Uptake and Utilization by Rice in Main Paddy Soils in Taihu Area |
| |
| ZHAO Hong-tao,ZHOU Jian-min,FAN Xiao-hui and LIU Chong-qun.Nitrogen Uptake and Utilization by Rice in Main Paddy Soils in Taihu Area[J].Soils,2006,38(2):153-157. |
| |
| Authors: | ZHAO Hong-tao ZHOU Jian-min FAN Xiao-hui and LIU Chong-qun |
| |
| Institution: | Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China,Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China,Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China and Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China |
| |
| Abstract: | A field experiment was carried out in two main paddy soils (Wushan soil,Huangni soil) in Taihu Area to study nitrogen uptake and utilization by rice,effect of nitrogen fertilizer on rice yield,and economic efficiency of N fertilization.The results indicated that the nitrogen uptake rate of rice was the highest at the booting stage,being around N 2.2~4.2 kg/(hm2·d),and the nitrogen apparent utilization rate of rice was about 31.62%~46.15%,and 37.64% on average.The recommended optimal N application rate was about N 227 kg/hm2 in Huangni soil and 255 kg/hm2 in Wushan soil for rice production. |
| |
| Keywords: | Paddy soil Nitrogen utilization rate Economic efficiency of nitrogen |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《土壤》浏览原始摘要信息 |
| 点击此处可从《土壤》下载免费的PDF全文 |
|
