| 不同水分条件与毕节烟田土壤氮素淋失的关系 |
| |
| 引用本文： | 胡 玮,刘吉振,邸 青,张谊模,田时炳.不同水分条件与毕节烟田土壤氮素淋失的关系[J].中国农学通报,2015,31(1):63-68. |
| |
| 作者姓名： | 胡 玮 刘吉振 邸 青 张谊模 田时炳 |
| |
| 作者单位： | (;1.贵州省烟草公司毕节市公司,贵州毕节 551700；;2.重庆市农科院蔬菜花卉研究所,重庆 400055） |
| |
| 基金项目： | 基金项目：贵州省烟草公司毕节市公司科研项目“毕节烟田土壤硝态氮淋失因素及调控技术研究”(201303)。 |
| |
| 摘 要： | 为了研究不同水分状况对毕节烟田土壤氮素淋失的影响，采用盆栽试验比较了2种土壤在3个土壤含水量层次下，土壤渗滤液中总氮含量、各氮素形态、硝态氮淋失量之间的差异。结果表明，在不同水分状况下，毕节烟田土壤渗滤液可溶性总氮含量随土壤含水量的增加而明显提高，其回归方程为 y=0.447lnx-0.222；毕节烟田土壤渗滤液中的主要氮素形态是可溶性有机氮和硝态氮，铵态氮所占比例较低；土壤硝态氮的累积程度和水分入渗量是决定毕节烟田土壤硝态氮淋失量的重要影响因子；毕节市金沙县的紫色土其氮素淋失风险显著高于七星关区的黄壤。
|
| 关 键 词： | 技术-环境贸易壁垒 技术-环境贸易壁垒 遵循成本 局部均衡分析 农产品 |
| 收稿时间： | 2014/7/30 0:00:00 |
| 修稿时间： | 2014/7/30 0:00:00 |
Relationship Between Different Water Conditions and Nitrogen Leaching in Tobacco Field of Bijie |
| |
| Hu Wei,Liu Jizhen,Di Qing,Zhang Yimo and Tian Shibing.Relationship Between Different Water Conditions and Nitrogen Leaching in Tobacco Field of Bijie[J].Chinese Agricultural Science Bulletin,2015,31(1):63-68. |
| |
| Authors: | Hu Wei Liu Jizhen Di Qing Zhang Yimo and Tian Shibing |
| |
| Institution: | (;1.Bijie Tobacco Company of Guizhou Province, Bijie Guizhou 551700;2.Vegetable and Flower Institute of Chongqing Academy of Agricultural Sciences, Chongqing 400055) |
| |
| Abstract: | To find out the effects of different water conditions on nitrogen leaching in tobacco field of Bijie, a pot experiment was conducted to determine the difference of total nitrogen content in soil leachate, various forms of nitrogen and nitrate leaching loss between the two kinds of soil under three soil moisture levels. The results showed that: the concentration of soluble total nitrogen in the percolation water was significantly improved with increasing soil moisture, the regression equation was y=0.447lnx-0.222. Soluble organic nitrogen and nitrates were the major forms of nitrogen in soil percolation water, while ammonium had a lower proportion compared with soluble organic nitrogen and nitrates. The accumulated soil nitrate and amount of infiltration were the important factors to determine nitrate leaching in Bijie tobacco field. The nitrogen leaching risk was significantly higher in purple soil than yellow soil. |
| |
| Keywords: | tobacco soil soil percolation water soluble organic nitrogen nitrate leaching |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《中国农学通报》浏览原始摘要信息 |
| 点击此处可从《中国农学通报》下载免费的PDF全文 |
