| 耕作措施对华北农田CO_2排放影响及水热关系分析 |
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| 引用本文： | 张宇,张海林,陈继康,伍芬琳,陈阜.耕作措施对华北农田CO_2排放影响及水热关系分析[J].农业工程学报,2009,25(4). |
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| 作者姓名： | 张宇 张海林 陈继康 伍芬琳 陈阜 |
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| 作者单位： | 中国农业大学农学与生物技术学院/农业部作物栽培与耕作学重点开放实验室,北京,100193 |
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| 基金项目： | 国家科技支撑计划，公益性行业(农业)科研专项基金 |
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| 摘 要： | 为探讨不同耕作措施对农田土壤呼吸排放的影响及其与土壤温度、水分之间的关系,该研究利用长期定位试验研究翻耕、旋耕、免耕3种耕作措施下冬小麦、夏玉米生育期农田CO2的排放通量及其季节变化规律,并通过农田土壤温度、水分对CO2的排放通量进行回归统计分析.结果表明:不同耕作措施下农田CO2排放通量具有明显的季节排放规律,冬小麦、夏玉米生育期农田CO2排放通量:翻耕>旋耕>免耕,且处理间差异都达到显著或极显著水平.不同耕作措施对农田土壤温度及土壤含水率具有显著的影响,免耕条件下农田各层土壤温度最低,冬小麦季免耕农田土壤水分含量高于其他两处理.各处理条件下农田CO2排放通量与土壤温度具有显著的相关性,其中翻耕处理的CO2排放通量与10 cm土温相关性最高,旋耕和免耕则均与20 cm土温相关性最高.当土壤温度高于10℃时CO2排放通量与5 cm土壤含水率具有显著的相关性,此时土壤水分成为CO2排放的主要影响因素.
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| 关 键 词： | 耕作 土壤水分 土壤温度 CO2排放通量 |
Effects of different tillage practices on CO_2 emission fluxes from farmland in North China Plain and the analysis of soil temperature and moisture |
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| Zhang Yu,Zhang Hailin,Chen Jikang,Wu Fenlin,Chen Fu.Effects of different tillage practices on CO_2 emission fluxes from farmland in North China Plain and the analysis of soil temperature and moisture[J].Transactions of the Chinese Society of Agricultural Engineering,2009,25(4). |
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| Authors: | Zhang Yu Zhang Hailin Chen Jikang Wu Fenlin Chen Fu |
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| Institution: | Key Laboratory of Crop Cultivation and Farming System;Ministry of Agriculture/College of Agronomy and Biotechnology;China Agricultural University;Beijing 100093;China |
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| Abstract: | In order to discuss the effects of different tillage measures on soil respiration emission and the relationship between soil respiration emission and soil temperature,soil respiration emission and soil moisture,experiments were conducted at long-term sited station to investigate the CO2 emission fluxes and their seasonal variation of winter wheat and summer maize with different tillage measures (conventional tillage,rotary tillage and no-tillage). The CO2 emission fluxes,soil temperature and soil water were... |
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| Keywords: | tillage soil moisture soil temperature CO2 emission fluxes |
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