...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Structural Convergence of Maize and Wheat Straw during Two-Year Decomposition under Different Climate Conditions
【24h】

Structural Convergence of Maize and Wheat Straw during Two-Year Decomposition under Different Climate Conditions

机译：不同气候条件下玉米和小麦秸秆两年分解过程中的结构收敛

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Straw decomposition plays an important role in soil carbon sequestration. Litter quality and climate condition are considered to be key factors that regulate straw decomposition.This study investigated the decomposition characteristics of wheat and maize straw under cold temperate, warm temperate,and midsubtropic climate conditions, and examined whether the chemical structures of straw residues became similar during decomposition under different climate conditions. Straws were put in 0.074-mm-mesh size litter bags to exclude soil fauna and buried in black soil plots at three experimental stations located in the aforementioned climate regions to rule out the impact of soil type. The decomposition rate constants of wheat straw and maize straw increased linearly with temperature, and the former was more sensitive to temperature. Climate conditions and straw quality had marked effects on the residual material structure in the first half year of decomposition, but then decreased. Wheat and maize straw showed common decomposition characteristics with a decrease of O/N-alkyl carbons and di-O-alkyls, and a simultaneous increase of alkyl carbons, aromatic carbons, aromatic C-O groups, and COO/N-C=O groups. Overall, the results indicated that the chemical compositions of the two types of straw became similar after 2-year decomposition under different climate conditions.
机译：秸秆分解在土壤碳固存中起重要作用。凋落物质量和气候条件被认为是调节秸秆分解的关键因素。本研究调查了在低温，温带和中亚热带气候条件下小麦和玉米秸秆的分解特征，并研究了秸秆残留物的化学结构是否相似在不同的气候条件下分解。将稻草放入0.074 mm网眼大小的垃圾袋中，以排除土壤动物，并在上述气候区域的三个实验站中将其埋在黑色土壤中，以排除土壤类型的影响。小麦秸秆和玉米秸秆的分解速率常数随温度线性增加，前者对温度更敏感。气候条件和秸秆质量对分解前半年的残留物质结构有显着影响，但随后下降。小麦和玉米秸秆表现出共同的分解特性，其中O / N-烷基碳和二-O-烷基减少，烷基碳，芳族碳，芳族C-O和COO / N-C = O基团同时增加。总体而言，结果表明，两种秸秆的化学成分在不同气候条件下经过2年分解后变得相似。

著录项

  • 来源
    《Environmental Science & Technology》 |2012年第13期|p.7159-7165|共7页
  • 作者

    Xiaoyue Wang; Bo Sun; Jingdong Mao; Yueyu Sui; Xiaoyan Cao;

  • 作者单位

    State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Sdence, Chinese Academy of Sciences, No. 71 East Beijing Road, Nanjing 210008, China,Graduate School of the Chinese Academy of Sciences, Beijing 100049, China;

    State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Sdence, Chinese Academy of Sciences, No. 71 East Beijing Road, Nanjing 210008, China;

    Department of Chemistry and Biochemistry, Old Dominion University, 4541 Hampton Boulevard, Norfolk, Virginia 23529, United States;

    Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Harbin 150040, China;

    Department of Chemistry and Biochemistry, Old Dominion University, 4541 Hampton Boulevard, Norfolk, Virginia 23529, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号