| 耕种方式对稻田甲烷排放的影响 |
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| 引用本文： | 马二登,纪洋,马静,徐华,蔡祖聪.耕种方式对稻田甲烷排放的影响[J].生态与农村环境学报,2010,26(6). |
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| 作者姓名： | 马二登 纪洋 马静 徐华 蔡祖聪 |
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| 作者单位： | 1. 土壤与农业可持续发展国家重点实验室/中国科学院南京土壤研究所,江苏,南京,210008;中国科学院研究生院,北京,100049
2. 土壤与农业可持续发展国家重点实验室/中国科学院南京土壤研究所,江苏,南京,210008 |
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| 基金项目： | 中国科学院知识创新重要方向项目群项目(KZCX2-YW-Q1-07); 科技部国际科技合作项目(2008DFA21330); 国家自然科学基金(40971154) |
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| 摘 要： | 通过田间试验研究了稻田2种土壤耕作强度(深翻耕和浅旋耕)和3种水稻栽培方式(直播、抛秧和插秧)下的CH4排放规律,以探讨稻田土壤耕作强度和水稻栽培方式对CH4排放的影响。结果表明,各水稻栽培方式下,深翻耕和浅旋耕稻田CH4排放季节变化趋势一致。土壤耕作强度对稻田CH4季节排放总量的影响受水稻栽培方式的制约:抛秧方式下,浅旋耕与深翻耕处理相比,稻田CH4排放量减少31.37%(P0.05);而直播和插秧方式下,2者CH4季节排放总量相当。水稻栽培方式显著影响稻田CH4排放季节变化规律:直播稻田CH4排放大致呈现"双峰型"模式,且水稻生育前期CH4排放水平较低;而移栽稻田(抛秧和插秧)CH4排放大致呈现"三峰型"模式,且水稻生育前期CH4排放水平较高。与深翻耕抛秧相比,深翻耕直播和深翻耕插秧稻田CH4排放分别减少23.31%和42.51%;而浅旋耕方式下,3种水稻栽培处理CH4季节排放总量相当。降低土壤耕作强度,以浅旋耕代替深翻耕,可以减少耕作对土壤的扰动,在一定程度上减少稻田CH4排放。与水稻移栽相比,水稻直播能够显著降低水稻生育前期CH4排放,具有一定的CH4减排潜力,但仍需加强中后期田间水分管理。
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| 关 键 词： | 稻田 直播 抛秧 插秧 耕作强度 甲烷排放 |
Effects of Soil Tillage and Rice Cultivation Pattern on Methane Emission From Paddy Field |
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| MA Er-deng,JI Yang,MA Jing,XU Hua,CAI Zu-cong.Effects of Soil Tillage and Rice Cultivation Pattern on Methane Emission From Paddy Field[J].Journal of Ecology and Rural Environment,2010,26(6). |
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| Authors: | MA Er-deng JI Yang MA Jing XU Hua CAI Zu-cong |
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| Institution: | MA Er-deng1,2,JI Yang1,MA Jing1,XU Hua1,CAI Zu-cong1(1.State Key Laboratory of Soil and Sustainable Agriculture/Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China,2.Graduate University of Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | A field experiment was carried out to study CH4 emissions from rice field as affected by two levels of soil tillage intensity(digging tillage and rotary tillage) and three rice cultivation patterns(direct seeding,seedling throwing and hand transplanting).Results show that the same in rice cultivation pattern,the tillage intensity treatments,digging and rotary tillage presented the same trend of seasonal variation in CH4 flux.The effect of tillage intensity on total CH4 emission during the rice-growing perio... |
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| Keywords: | rice field direct seeding seedling throwing hand transplanting soil tillage intensity CH4 emission |
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