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秸秆源黑炭还田对水稻土生产力和固碳的影响

王江伟 周春菊 赵 旭 徐浩江 王慎强 邢光熹

王江伟, 周春菊, 赵 旭, 徐浩江, 王慎强, 邢光熹. 秸秆源黑炭还田对水稻土生产力和固碳的影响[J]. 环境科学研究, 2013, 26(12): 1325-1332.
引用本文: 王江伟, 周春菊, 赵 旭, 徐浩江, 王慎强, 邢光熹. 秸秆源黑炭还田对水稻土生产力和固碳的影响[J]. 环境科学研究, 2013, 26(12): 1325-1332.
WANG Jiang-wei, ZHOU Chun-ju, ZHAO Xu, XU Hao-jiang, WANG Shen-qiang, XING Guang-xi. Effects of Crop-Straw Biochar on Paddy Soil Productivity and Carbon Sequestration[J]. Research of Environmental Sciences, 2013, 26(12): 1325-1332.
Citation: WANG Jiang-wei, ZHOU Chun-ju, ZHAO Xu, XU Hao-jiang, WANG Shen-qiang, XING Guang-xi. Effects of Crop-Straw Biochar on Paddy Soil Productivity and Carbon Sequestration[J]. Research of Environmental Sciences, 2013, 26(12): 1325-1332.

秸秆源黑炭还田对水稻土生产力和固碳的影响

基金项目: 国家自然科学基金项目(41001147,41271312);中国科学院南京土壤研究所知识创新项目(Y112000010)

Effects of Crop-Straw Biochar on Paddy Soil Productivity and Carbon Sequestration

  • 摘要:

    为揭示秸秆源黑炭连续还田对太湖平原稻麦轮作农田土壤生产力和固碳作用的影响,设黑炭施加量为0(CK)、4.5和9.0t/hm23个处理,通过2a 4个完整稻麦轮作季的盆栽试验,研究了稻秆来源黑炭每季还田下的稻麦作物产量.养分吸收状况及土壤理化性质的变化. 结果显示,土壤w(TOC)(TOC为总有机碳)和w(全N)随黑炭施加量的增加而增加. 每季黑炭施加量为9.0t/hm2时,土壤w(TOC)和w(全N)可分别提高46.7%~113.0%和9.3%~28.3%. 黑炭施入土壤后能够提高稻麦作物地上部分生物量,籽粒产量增加11.4%~60.5%,秸秆产量增加15.0%~56.8%. 黑炭处理下稻麦作物体内N、P、K、Mg和Ca的累积量显著提高,这一现象与每季结束后土壤w(全N)以及土壤有效元素含量〔w(有效P)、w(有效K)、w(有效Mg)和w(有效Ca)〕的增加相吻合. 黑炭施入可显著提高土壤pH和CEC(阳离子交换量),尤其是黑炭施加量为9.0t/hm2时,pH最高可达6.79,CEC最高达到12.7cmol/kg. 连续三季施入黑炭后,土壤容重比不施黑炭处理降低8.0%~12.2%. 试验结果表明,秸秆来源黑炭施入太湖平原稻麦农田可起到固碳增汇、增加土壤碳库容量的作用,也能改善土壤理化性质,提高土壤生产力.

     

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出版历程
  • 收稿日期:  2013-06-24
  • 修回日期:  2013-09-26
  • 刊出日期:  2013-12-25

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