| 地膜覆盖对菜地生态系统N2O排放的影响 |
| |
| 引用本文： | 冯迪,郝庆菊,张凯莉,石将来,石孝均,江长胜.地膜覆盖对菜地生态系统N2O排放的影响[J].环境科学,2017,38(10):4380-4389. |
| |
| 作者姓名： | 冯迪 郝庆菊 张凯莉 石将来 石孝均 江长胜 |
| |
| 作者单位： | 西南大学资源环境学院, 三峡库区生态环境教育部重点实验室, 重庆 400715,西南大学资源环境学院, 三峡库区生态环境教育部重点实验室, 重庆 400715,西南大学资源环境学院, 三峡库区生态环境教育部重点实验室, 重庆 400715,西南大学资源环境学院, 三峡库区生态环境教育部重点实验室, 重庆 400715,西南大学资源环境学院, 三峡库区生态环境教育部重点实验室, 重庆 400715;国家紫色土肥力与肥料效益监测基地, 重庆 400715,西南大学资源环境学院, 三峡库区生态环境教育部重点实验室, 重庆 400715 |
| |
| 基金项目： | 国家自然科学基金项目（41275160，40975095）；中央高校基本科研业务费专项（XDJK2015A013，XDJK2013A009） |
| |
| 摘 要： | 为了探讨地膜覆盖对菜地N_2O的排放通量、土壤剖面N_2O浓度以及土壤温度和湿度的影响,选取西南地区常见菜地(辣椒-萝卜轮作)为研究对象,采用静态暗箱/气相色谱法,进行了为期1 a的野外观测实验.结果表明,在辣椒季,常规处理(不覆膜)N_2O的平均排放通量为1000.0μg·(m~2·h)~(-1),覆膜处理为400.6μg·(m~2·h)~(-1),覆膜显著低于常规处理(P0.05);而在萝卜季,N_2O的平均排放通量则表现为覆膜处理128.1μg·(m~2·h)~(-1)]高于常规处理107.8μg·(m~2·h)~(-1)],但两者差异未达到显著水平(P0.05).覆膜和常规菜地土壤中N_2O含量均基本随土层深度的增加而增加,表现为:30 cm20cm10 cm,相同处理各层次土壤N_2O含量间均呈显著相关,不同处理相同深度处的土壤N_2O含量间也存在显著的正相关关系.对不同土层中的N_2O含量与地表N_2O排放通量的相关性分析可得出,常规处理各土层处的N_2O含量与地表N_2O排放通量呈显著正相关关系.覆膜处理的N_2O排放通量仅与30 cm深土壤中的N_2O含量存在显著正相关关系.通过对土壤湿度和温度的观测可以得出,地膜覆盖对土壤的增温效应在夏季更加明显,对土壤的保水作用在秋冬季更加突出.相关性分析和主成分分析结果表明,土壤中氮素形态是决定农田N_2O排放最重要的因素,其中常规菜地N_2O排放主要受土壤中总氮含量的影响,而覆膜菜地N_2O的排放对土壤中无机态氮含量的变化更加敏感.
|
| 关 键 词： | 西南地区 地膜覆盖 菜地 N2O排放 影响因素 |
| 收稿时间： | 2017/2/2 0:00:00 |
| 修稿时间： | 2017/4/30 0:00:00 |
Effects of Plastic Film Mulching on Nitrous Oxide Emissions from a Vegetable Field |
| |
| FENG Di,HAO Qing-ju,ZHANG Kai-li,SHI Jiang-lai,SHI Xiao-jun and JIANG Chang-sheng.Effects of Plastic Film Mulching on Nitrous Oxide Emissions from a Vegetable Field[J].Chinese Journal of Environmental Science,2017,38(10):4380-4389. |
| |
| Authors: | FENG Di HAO Qing-ju ZHANG Kai-li SHI Jiang-lai SHI Xiao-jun and JIANG Chang-sheng |
| |
| Institution: | Key Laboratory of Eco-environments in Three Gorges Reservoir Region of Ministry of Education, College of Resources and Environment, Southwest University, Chongqing 400715, China,Key Laboratory of Eco-environments in Three Gorges Reservoir Region of Ministry of Education, College of Resources and Environment, Southwest University, Chongqing 400715, China,Key Laboratory of Eco-environments in Three Gorges Reservoir Region of Ministry of Education, College of Resources and Environment, Southwest University, Chongqing 400715, China,Key Laboratory of Eco-environments in Three Gorges Reservoir Region of Ministry of Education, College of Resources and Environment, Southwest University, Chongqing 400715, China,Key Laboratory of Eco-environments in Three Gorges Reservoir Region of Ministry of Education, College of Resources and Environment, Southwest University, Chongqing 400715, China;National Monitoring Station of Soil Fertility and Fertilizer Efficiency on Purple Soils, Chongqing 400715, China and Key Laboratory of Eco-environments in Three Gorges Reservoir Region of Ministry of Education, College of Resources and Environment, Southwest University, Chongqing 400715, China |
| |
| Abstract: | |
| |
| Keywords: | Southwestern China plastic film mulching vegetable field ecosystem N2O emissions influencing factors |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《环境科学》浏览原始摘要信息 |
| 点击此处可从《环境科学》下载免费的PDF全文 |
|
