| 不同耕作模式下稻田生态系统对田面水中无机态氮的消纳 |
| |
| 引用本文： | 唐颖,黄慰情,黄耀华,雷琳,黄登海,蒋先军,周鑫斌,谢德体.不同耕作模式下稻田生态系统对田面水中无机态氮的消纳[J].西南师范大学学报(自然科学版),2011,36(6). |
| |
| 作者姓名： | 唐颖 黄慰情 黄耀华 雷琳 黄登海 蒋先军 周鑫斌 谢德体 |
| |
| 作者单位： | 西南大学资源环境学院; |
| |
| 基金项目： | 国家科技支撑计划“沿三峡水库(重大工程区)农业面源污染防控与综合治理技术研究”(2007BAD87B10) |
| |
| 摘 要： | 稻田生态系统可以有效减少流入水体的农业面源污染物.本文通过模拟试验,研究了不同施肥时间(常规施肥时间和在此基础上提前一个半月施肥)以及在不同耕作模式(垄作、平作)下稻田生态系统对田面水中无机态氮的消纳效果.结果表明:稻田生态系统能够有效降低田面水中无机态氮、全磷的含量.与灌水第1d相比,灌水14d后,所有稻田田面水中NH4+-N浓度平均下降84.3%,灌水21d后,所有稻田田面水中NO3--N浓度平均下降64.6%,TP浓度下降58.0%;提前施肥条件下稻田生态系统对田面水中无机态氮具有更好的吸附、消纳效果,灌水后的第1d,所有稻田田面水中NH4+-N浓度均出现最高值,其中,常规时间施肥和提前施肥NH4+-N质量体积浓度分别为2.52和1.28mg/L,灌水后的第3d,常规时间施肥稻田田面水中NO3--N质量体积浓度上升至最大值5.92mg/L,而此时提前施肥稻田约为3.65mg/L;不同耕作模式对无机态氮消纳的影响差异不显著.
|
| 关 键 词： | 面源污染 稻田生态系统 保护性耕作 |
Inorganic Nitrogen Sequestration in Rice-based Ecosystems by Different Times of Fertilization and Tillage Methods |
| |
| TANG Ying,HUANG Wei-qing,HUANG Yao-hua,LEI Lin,HUANG Deng-hai,JIANG Xian-jun,ZHOU Xin-bin,XIE De-ti College of Resource , Environment,Southwest University,Chongqing ,China.Inorganic Nitrogen Sequestration in Rice-based Ecosystems by Different Times of Fertilization and Tillage Methods[J].Journal of Southwest China Normal University(Natural Science),2011,36(6). |
| |
| Authors: | TANG Ying HUANG Wei-qing HUANG Yao-hua LEI Lin HUANG Deng-hai JIANG Xian-jun ZHOU Xin-bin XIE De-ti College of Resource Environment Southwest University Chongqing China |
| |
| Institution: | TANG Ying,HUANG Wei-qing,HUANG Yao-hua,LEI Lin,HUANG Deng-hai,JIANG Xian-jun,ZHOU Xin-bin,XIE De-ti College of Resource and Environment,Southwest University,Chongqing 400715,China |
| |
| Abstract: | Rice-based ecosystems could be used to sequestrate pollutants from agricultural waste water.Through the simulation test,the consumption of inorganic nitrogen was studied in the paddy field surface water under different fertilization time(regular fertilization time and fertilized one and a half month earlier,which was called early irrigation in the present paper)and different tillage methods(ridge tillage and conventional tillage).It was found that: rice-based ecosystem could effectively reduce the contents ... |
| |
| Keywords: | non-point source pollution wetland ecosystem protection of cultivated land environmental risks |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《西南师范大学学报(自然科学版)》浏览原始摘要信息 |
| 点击此处可从《西南师范大学学报(自然科学版)》下载免费的PDF全文 |
|
