期刊文献+

地膜覆盖对菜园紫色土壤环境因子及N2O排放的影响 预览 被引量:6

Effects of Plastic Film Mulching on the Environmental Factors and Nitrous Oxide Emissions in Purple Soil of Vegetable Fields
在线阅读 下载PDF
收藏 分享 导出
摘要 地膜覆盖技术目前被广泛使用,为了研究地膜覆盖对土壤环境因子及N_2O排放的影响,以重庆市典型的紫色土为研究对象,以传统不覆膜方法为对照,在萝卜生长季应用静态暗箱/气相色谱法通过原位测定进行研究。结果表明,覆膜处理方式下地下5cm土壤温度明显变高、总生物量明显增大,均极显著高于不覆膜处理(P=0.02和P=0.005);叶重和肉质根均明显增加(P=0.011和P=0.013),但二者在土壤湿度及土壤硝态氮含量间则无显著差异。在萝卜生长周期内,覆膜处理下N_2O平均排放通量发芽期为(70.21±10.51)μg/(m^2.h),叶片生长旺盛期盛期为(65.43±5.66)μg/(m^2.h);幼苗期的地膜覆盖措施使N2O排放通量最高,平均通量达(109.13±11.23)μg/(m^2.h),肉质根生长期最低,为(62.81±15.10)μg/(m^2.h),全季的平均排放通量为(58.59±10.76)μg/(m^2.h),总排放量为1.58kg/hm~2。而常规对照条件下全季N2O的平均排放通量为(51.39±12.09)μg/(m^2.h),总排放量1.30kg/hm~2,覆膜与不覆膜相比N_2O排放全季增加了21.5%。因此,覆膜处理既能增加萝卜产量,也能增加N_2O的排放。 Nowadays,the plastic film mulching was applied in croplands all over the world,in order to study the effect of plastic film mulching on soil environmental factors and the nitrous oxide emission,the author made the typical purple soil in Chongqing as the research objective,and comparing with the traditional cropping system(no plastic film mulching) ,a field experiment was conducted in situ for half a year during the radish growing period by the method of static opaque chamber and gas chromatogram method.The result showed that the temperature of soil in 5 cm depth under the plastic film mulching was higher greatly and the total biomass of radish improved obviously than that of control(P=0.02 and P=0.005) ,the weight of leaves and stalk of radish under the plastic film mulching were also obviously higher than that of the control group(P=0.011 and P=0 .013) ,but there was no significant differences in the soil moisture and nitrate nitrogen between two groups.During the radish growing periods,the average N_2O flux was(58.59±10.76) μg/(m~2 ·h) and total N_2O emission amount was 1.58 kg/hm 2 in the whole observing period,and the average N_2O flux in the 4 stages of radish under plastic film mulching was(70.21±10.51) μg/(m~2 ·h) in germinate stage,(65.43±5.66) μg/(m~2 ·h) in leaves vigorous growing stage,(109.13±11.23) μg/(m~2 ·h) in seedling stage and(62.81±15.10) μg/(m~2 ·h) in stalk growing stage,respectively.The average N_2O flux was(58.59±10.76) μg/(m~2 ·h) and total N_2O emission amount was 1.30 kg/hm~2 under no film mulching in the whole observing period.The N_2O emission amount increased 21.5% under plastic film mulching than no film mulching during the whole observing period.So planting the radish with film mulching method could improve the yield,but increased the N_2O emission as well.
作者 郑磊 江长胜 孙丽娟 刘聪 冉思丹 黄欢 邱昕恺 Zheng Lei,Jiang Changsheng,Sun Lijuan,Liu Cong,Ran Sidan,Huang Huan,Qiu Qikai(1Key Laboratory of Eco-environments in Three Gorges Reservoir Region,Ministry of Education/College of Resources and Environment,Southwest University,Chongqing 400715;2Chongqing Key Laboratory of Agricultural Resources and Environment,Chongqing 400716)
出处 《中国农学通报》 CSCD 北大核心 2011年第30期 82-87,共6页 Chinese Agricultural Science Bulletin
基金 国家自然科学基金项目“水位变化对三峡水库消落区温室气体排放的影响研究”(40975095) 西南大学资源环境学院大学生科技创新“光炯”培育重大项目“地膜覆盖对菜园土壤CO2和N2O排放的影响”(20100103) 西南大学生态学重点学科“211工程”三期建设项目
关键词 N2O排放 地膜覆盖 菜园 紫色土 nitrous oxide emission plastic film mulching vegetable garden purple soil
作者简介 郑磊,男,1989年出生,重庆沙坪坝人,本科,研究方向:环境工程。E—man:452183259@qq.com。 通讯作者:江长胜,男,1974年出生,江西贵溪人,教授,博士,主要从事农田生态系统碳氮循环研究。通信地址:400716重庆市北碚区西南大学资源环境学院,Tel:023-68250484,E-maihjiangcs@126.com。
  • 相关文献

参考文献19

二级参考文献138

共引文献594

同被引文献153

引证文献6

二级引证文献54

投稿分析

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部 意见反馈