冬季土地管理对稻季CH4产生、氧化和排放的影响

doi:CNKI:SUN:NCST.0.2010-02-001

生态与农村环境学报 ›› 2010, Vol. 26 ›› Issue (2): 97-102.doi: CNKI:SUN:NCST.0.2010-02-001

• 区域环境与发展 • 下一篇

冬季土地管理对稻季CH₄产生、氧化和排放的影响

张广斌, 张晓艳, 马二登, 马静, 徐华, 蔡祖聪

中国科学院南京土壤研究所

收稿日期:2009-08-10 出版日期:2010-03-25 发布日期:2011-04-01
通讯作者: 徐华中国科学院南京土壤研究所 E-mail:hxu@issas.ac.an
作者简介:张广斌(1983－)，男，湖南邵阳人，博士生，主要从事农田温室气体排放规律及其机理方面的研究。E-mail: gbzhang@issas.ac.cn
基金资助:
中国科学院知识创新重要方向项目群(KZCX2-YW-Q1-07);国家科技支撑计划项目(2007BAD89B18);中国科学院院长奖专项资金

Effects of Land Management in Winter on Production, Oxidation and Emission of CH₄ During the Rice-Growing Season

ZHANG Guang-Bin, ZHANG Xiao-Yan, MA 二Deng, MA Jing, XU Hua, CAI Zu-Cong

Institute of Soil Science,Chinese Academy of Sciences

Received:2009-08-10 Online:2010-03-25 Published:2011-04-01
Contact: XU Hua Institute of Soil Science,Chinese Academy of Sciences E-mail:hxu@issas.ac.an

摘要/Abstract

摘要： 通过室内培养和田间试验测定了冬季休闲、种麦和淹水处理水稻生长期CH₄的产生潜力、氧化潜力及其排放通量,以探讨冬季土地管理对后续稻季CH₄产生、氧化和排放的影响。结果表明:休闲与种麦处理间CH₄产生潜力无显著差异(P>0.05),但2者均显著低于淹水处理(P<0.05);各处理间CH₄氧化潜力无显著差异(P>0.05),土壤中NH₄⁺-N含量可能是较冬季土地管理更为重要的影响CH₄氧化潜力的因素;休闲处理CH₄平均排放通量显著高于种麦处理(P<0.05),但2者均显著低于淹水处理(P<0.05)。冬季持续淹水稻田CH4产生潜力显著高于冬季排水稻田是其CH₄排放量远高于冬季排水稻田的原因。冬季土地管理对稻季CH₄排放的影响主要受CH₄产生潜力而非CH₄氧化潜力的限制。

关键词: CH₄产生潜力, CH₄氧化潜力, CH₄排放通量, 土地管理

Abstract: To study effects of land management in winter on production,oxidation, and emission of CH₄ from the paddy field during the following rice-growing season, indoor incubation and field experiments were carried out to measure CH₄ production potential, CH₄ oxidation potential, and CH₄ flux in Treatments DF (drained fallow), DW (drained with wheat planting), and FF (flooded fallow). Results show that no significant difference in CH₄ production potential was observed between Treatments DF and DW (P>0.05), but both were significantly lower than in Treatment FF (P<0.05). No significant difference in CH₄ oxidation potentials was observed among the three treatments (P>0.05). Compared with the effects of land management in winter on CH₄ oxidation potential, the effect of soil NH₄⁺-N content during the rice-growing season was more important. The mean CH₄ flux was much higher in Treatment DF than in Treatment DW (P<0.05), but both were significantly lower than in Treatment FF (P<0.05). The significantly higher CH₄ production potential in Treatment FF than in Treatment DF was the reason why the CH₄ flux in Treatment FF was much higher. The effects of land management in winter on CH₄ emission during the rice-growing season were mainly affected by CH₄ production potential rather than CH₄ oxidation potential.

Key words: CH₄ production potential, CH₄ oxidation potential, CH₄ flux, land management

中图分类号:

S511

张广斌, 张晓艳, 马二登, 马静, 徐华, 蔡祖聪. 冬季土地管理对稻季CH₄产生、氧化和排放的影响[J]. 生态与农村环境学报, 2010, 26(2): 97-102.

ZHANG Guang-Bin, ZHANG Xiao-Yan, MA 二Deng, MA Jing, XU Hua, CAI Zu-Cong. Effects of Land Management in Winter on Production, Oxidation and Emission of CH₄ During the Rice-Growing Season[J]. Journal of Ecology and Rural Environment, 2010, 26(2): 97-102.

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冬季土地管理对稻季CH₄产生、氧化和排放的影响

Effects of Land Management in Winter on Production, Oxidation and Emission of CH₄ During the Rice-Growing Season

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