胡南南, 逄　蕾, 路建龙, 杨　锦, 王小燕, 肖歆玥, 郑浩飞, 马明生, 刘兵艳, 杨　楠. 秸秆覆盖对玉米农田土壤有机碳及其组分的影响[J]. 土壤通报, 2024, 55(3): 695 − 706. DOI: 10.19336/j.cnki.trtb.2023050302
引用本文: 胡南南, 逄　蕾, 路建龙, 杨　锦, 王小燕, 肖歆玥, 郑浩飞, 马明生, 刘兵艳, 杨　楠. 秸秆覆盖对玉米农田土壤有机碳及其组分的影响[J]. 土壤通报, 2024, 55(3): 695 − 706. DOI: 10.19336/j.cnki.trtb.2023050302
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HU Nan-nan, PANG Lei, LU Jian-long, YANG Jin, WANG Xiao-yan, XIAO Xin-yue, ZHENG Hao-fei, MA Ming-sheng, LIU Bing-yan, YANG Nan. Effects of Straw Mulching on Soil Organic Carbon and Its Components in Maize fields[J]. Chinese Journal of Soil Science, 2024, 55(3): 695 − 706. DOI: 10.19336/j.cnki.trtb.2023050302
Citation: HU Nan-nan, PANG Lei, LU Jian-long, YANG Jin, WANG Xiao-yan, XIAO Xin-yue, ZHENG Hao-fei, MA Ming-sheng, LIU Bing-yan, YANG Nan. Effects of Straw Mulching on Soil Organic Carbon and Its Components in Maize fields[J]. Chinese Journal of Soil Science, 2024, 55(3): 695 − 706. DOI: 10.19336/j.cnki.trtb.2023050302
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秸秆覆盖对玉米农田土壤有机碳及其组分的影响

Effects of Straw Mulching on Soil Organic Carbon and Its Components in Maize fields

    摘要
  • 摘要:
    目的 探究旱地秸秆覆盖条件下土壤有机碳组分及碳库管理指数的变化。
    方法 2022年依托大田试验，设秸秆带状覆盖（TSM）和秸秆碎秆覆盖（TSR）试验为主效应处理，以地膜覆盖（TPM）和露地平作（TCK）为双对照，测定分析玉米农田播前和收获后0 ~ 20 cm、20 ~ 40 cm和40 ~ 60 cm土层的土壤总有机碳（TOC）、易氧化有机碳（EOC）、可溶性有机碳（DOC）和颗粒有机碳（POC）含量，并计算土壤碳库管理指数。
    结果 与播前相比，处理TCK和TPM降低了0 ~ 60 cm土层TOC含量，TSM和TSR提高了0 ~ 20 cm土层TOC含量；各处理降低了0 ~ 60 cm土层EOC、DOC和POC含量及其占TOC比例。收获期，TSM较TCK显著增加了土壤POC、EOC、DOC和TOC含量，提高幅度分别为47.52%、38.47%、20.58%和19.91%；TSR较TCK显著增加了0 ~ 20 cm土层TOC和DOC含量，提高幅度分别为3.43%和14.55%；显著提高了0 ~ 60 cm土层EOC含量和POC含量，提高幅度分别为5.81%和20.95%。收获期，TSM较TPM显著提高了0 ~ 60 cm土层EOC、TOC、POC和DOC含量，提高幅度分别为25.00%、22.51%、19.30%和12.69%。TSR较TPM显著提高了0 ~ 20 cm土层DOC、EOC和TOC含量，提高幅度分别为20.04%、7.75%和7.10%，显著提高了0 ~ 40 cm土层POC含量，提高幅度为27.64%。与TCK相比，TSM显著提高了0 ~ 60 cm土层土壤碳库指数、碳库活度、碳库活度指数和碳库管理指数；TSR提高了0 ~ 20 cm土层土壤碳库指数以及0 ~ 60 cm土层土壤碳库活度、碳库活度指数和碳库管理指数。与TPM相比，TSM显著提高了0 ~ 60 cm土层土壤碳库指数和碳库管理指数，TSR显著提高了0 ~ 20 cm土层土壤碳库指数。
    结论 秸秆带状覆盖可有效提高土壤有机碳组分含量及碳库管理指数，可为半干旱雨养区农业高产高效种植提供理论支撑。

     

    Abstract:
    Objective The aim was to investigate the impact of straw mulching on soil total organic carbon (TOC) composition and carbon pool management index in dryland.
    Method Straw strip covering (TSM) and straw residue covering (TSR) trials were set up as the main effect treatments in the field trials since 2022, with plastic film covering (TPM) and open field flat cropping (TCK) as double controls. The TOC and easily oxidizable organic carbon (EOC) were determined in soil layers of 0 - 20 cm, 20 - 40 cm and 40 - 60 cm before sowing and during the harvest period of corn farmland, and the contents of soluble organic carbon (DOC) and particulate organic carbon (POC) and the soil carbon pool management index were calculated.
    Result  The treatments of TCK and TPM reduced the TOC content in the 0 - 60 cm soil layer compared with before sowing, while TSM and TSR increased the TOC content in the 0 - 20 cm soil layer. Each treatment reduced the EOC, DOC and POC contents and their distribution proportion in the 0 - 60 cm soil layer. During the harvest period, TSM significantly increased the contents of soil POC, EOC, DOC, and TOC compared to TCK, reaching 47.52%, 38.47%, 20.58%, and 19.91%, respectively. TSR significantly increased the TOC and DOC contents in the 0 - 20 cm soil layer by 3.43% and 14.55%, and significantly increased the EOC and POC contents in the 0 - 60 cm soil layer by 5.81% and 20.95%. During the harvest period, TSM significantly increased the contents of EOC, TOC, POC and DOC in the 0 - 60 cm soil layer compared to TPM, by 25.00%, 22.51%, 19.30% and 12.69%, respectively. Compared with TPM, TSR significantly increased the contents of DOC, EOC and TOC in the 0 - 20 cm soil layer by 20.04%, 7.75% and 7.10%, respectively, and significantly increased the POC content in the 0 - 40 cm soil layer by 27.64%. TSM significantly increased the soil carbon pool index, carbon pool activity, carbon pool activity index and carbon pool management index in the 0 - 60 cm soil layer compared with TCK. TSM significantly increased the soil carbon pool index and carbon pool management index in the 0 - 60 cm soil layer compared with TPM, while TSR significantly increased the soil carbon pool index in the 0 - 20 cm soil layer.
    Conclusion Straw strip mulching can effectively improve the contents of soil organic carbon components and carbon pool management index, providing theoretical support for high-yield and efficient agricultural planting in semi-arid rainfed areas.

     

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