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    李晓庆, 赵承森, 孟雨田, 等. 玉米秸秆对不同有机碳含量的黑土有机碳库的影响[J]. 华南农业大学学报, 2018, 39(6): 39-46. doi: 10.7671/j.issn.1001-411X.2018.06.007
    引用本文: 李晓庆, 赵承森, 孟雨田, 等. 玉米秸秆对不同有机碳含量的黑土有机碳库的影响[J]. 华南农业大学学报, 2018, 39(6): 39-46. doi: 10.7671/j.issn.1001-411X.2018.06.007
    shu
    LI Xiaoqing, ZHAO Chengsen, MENG Yutian, XU Qingqing, CHEN Lin, MA Xiaowei, LIU Xibo, WANG Hongyan, ZHAO Wei. Effects of maize straw on organic carbon pool in different organic carbon with different contents of organic carbon in black soil[J]. Journal of South China Agricultural University, 2018, 39(6): 39-46. DOI: 10.7671/j.issn.1001-411X.2018.06.007
    Citation: LI Xiaoqing, ZHAO Chengsen, MENG Yutian, XU Qingqing, CHEN Lin, MA Xiaowei, LIU Xibo, WANG Hongyan, ZHAO Wei. Effects of maize straw on organic carbon pool in different organic carbon with different contents of organic carbon in black soil[J]. Journal of South China Agricultural University, 2018, 39(6): 39-46. DOI: 10.7671/j.issn.1001-411X.2018.06.007
    shu

    玉米秸秆对不同有机碳含量的黑土有机碳库的影响

    Effects of maize straw on organic carbon pool in different organic carbon with different contents of organic carbon in black soil

      摘要
    • 摘要:
      目的  研究玉米秸秆不同添加量对不同有机碳含量的黑土土壤有机碳库的影响，为提高退化的黑土质量以及利用秸秆修复退化黑土提供重要参考。
      方法  通过室外培养法，在2种不同有机碳含量的黑土中添加不同量(w)的玉米秸秆(0.5%、1.5%和2.5%)，研究黑土有机碳库中总有机碳(TOC)、易氧化有机碳(ROC)、微生物量碳(MBC)、溶解性有机碳(DOC)、颗粒有机碳(POC)、轻组有机碳(LFOC)、矿物结合态有机碳(MOC)、重组有机碳(HFOC)和惰性碳(IOC)的含量变化及各组分之间的相关关系。
      结果  不同添加量的玉米秸秆均可增加2种有机碳含量黑土的TOC、ROC、MBC、DOC、POC、LFOC、MOC和IOC含量，且对低有机碳含量的黑土提高效果更明显，但却降低了2种黑土的HFOC含量。土壤有机碳库各组分除LFOC和HFOC之外均与TOC具有极显著正相关关系，ROC、MBC、DOC和POC含量之间具有极显著相关性。
      结论  添加不同量玉米秸秆对2种有机碳含量的黑土均有一定的影响，高添加量秸秆施入可以有效提升高、低有机碳含量黑土的有机碳库组分，对低有机碳含量的黑土效果更好。在本试验玉米秸秆添加范围内，最佳添加质量分数为2.5%。

       

      Abstract:
      Objective  To investigate the effects of different addition levels of maize straw on organic carbon pool of black soil with different organic carbon contents, and provide important references for improving the quality of degraded black soil and repairing with straw.
      Method  Different amounts (0.5%, 1.5%, and 2.5%) of maize straw were added to black soils with two different organic carbon contents by outdoor culture method to study the content changes of total organic carbon (TOC), readily oxidizable organic carbon (ROC), microbial biomass carbon (MBC), dissolved organic carbon (DOC), particulate organic carbon (POC), light fraction organic carbon (LFOC), mineral-bound organic carbon (MOC), high fraction carbon soil (HFOC) and inert organic carbon (IOC), and correlations among each component of the soil.
      Result  All three straw amounts applied increased the contents of TOC, ROC, MBC, DOC, POC, LFOC, MOC, and IOC in two black soils. The enhancing effects were more obvious on the soil with low organic carbon content than the soil with high organic carbon content. The HFOC contents of the two black soils decreased. All the components of soil organic carbon pool except LFOC and HFOC had highly significant positive correlations with TOC. Also the correlation relationships between ROC, MBC, DOC contents and POC content in each treatment were highly significant.
      Conclusion  All three straw adding amounts have certain effects on the black soils with two kinds of organic carbon contents. The application of high straw adding amount can effectively enhance the carbon pool component contents of two soils, especially the soil with low organic carbon content. In the range of straw adding amount, the best treatment is mass ratio 2.5%.

       

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