| 周年秸秆还田对农田土壤固碳及冬小麦-夏玉米产量的影响 |
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| 引用本文： | 李昊昱,孟兆良,庞党伟,陈金,侯永坤,崔海兴,金敏,王振林,李勇.周年秸秆还田对农田土壤固碳及冬小麦-夏玉米产量的影响[J].作物学报,2019,45(6):893-903. |
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| 作者姓名： | 李昊昱 孟兆良 庞党伟 陈金 侯永坤 崔海兴 金敏 王振林 李勇 |
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| 作者单位： | 山东农业大学农学院/作物生物学国家重点实验室;山东农业大学生命科学学院 |
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| 基金项目： | This study was supported by the National Research and Development Program(2016YFD0300400);This study was supported by the National Research and Development Program(2017YFD0301001);the National Basic Research Program of China(2015CB150404);the Shandong Mount Tai Program for Industrial Leading Talents, and the Shandong Innovation Project for Applied Technologies in Agriculture (2014GJJS0201-5-2). |
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| 摘 要： | 为明确不同秸秆还田模式对黄淮海东部小麦-玉米周年产量与农田土壤固碳的影响,研究了双季秸秆不还田(NS),夏玉米季秸秆还田(SS),冬小麦季秸秆还田(WS)和双季秸秆还田(DS)对0～40cm各土层土壤容重(SBD),有机碳含量(SOC)、储量(SCS)和土壤团聚体分布及固碳能力(CPC)的影响。结果表明,秸秆还田尤其是双季秸秆还田模式显著降低土壤容重,促进0～30 cm各土层0.25 mm粒级团聚体向大团聚体团聚,5 mm、5～2 mm和1～0.5 mm粒级团聚体质量比例显著升高,平均增加57.2%、25.0%和13.7%;同时,土壤团聚体的平均重量直径(MWD)提高22.7%;与NS相比,秸秆还田显著提高了土壤有机碳含量,增幅为4.0%～20.7%;有机碳储量增幅为0.2%～14.7%。且双季秸秆还田对0～30 cm各粒级团聚体关联SOC和土壤固碳能力的提升作用最为显著。0～30 cm土层中秸秆还田量与SOC、SOC与MWD均呈显著正相关;而SOC与SBD则呈显著负相关。在30～40 cm土层中,各处理差异不显著。与不还田处理相比,各还田处理均提高小麦-玉米周年产量,其中, DS处理增产幅度最大,两个周年平均增产达14.3%。双季还田模式是当前黄淮海区域土质提升和作物增产的最佳措施;单季秸秆还田能维持较高的土壤生产力,同时提供大量秸秆的饲料化、能源化和原料化多元利用。
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| 收稿时间： | 2018-10-21 |
Effect of annual straw return model on soil carbon sequestration and crop yields in winter wheat-summer maize rotation farmland |
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| Hao-Yu LI,Zhao-Liang MENG,Dang-Wei PANG,Jin CHEN,Yong-Kun HOU,Hai-Xing CUI,Min JIN,Zhen-Lin WANG,Yong LI.Effect of annual straw return model on soil carbon sequestration and crop yields in winter wheat-summer maize rotation farmland[J].Acta Agronomica Sinica,2019,45(6):893-903. |
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| Authors: | Hao-Yu LI Zhao-Liang MENG Dang-Wei PANG Jin CHEN Yong-Kun HOU Hai-Xing CUI Min JIN Zhen-Lin WANG Yong LI |
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| Institution: | 1.Agronomy College, Shandong Agricultural University / State Key Laboratory of Crop Biology, Tai’an 271018, Shandong, China;2.College of Life Sciences, Shandong Agricultural University, Tai’an 201018, Shandong, China; |
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| Abstract: | This study sought to determine the effects of different straw return patterns on the annual wheat-maize yield and soil organic carbon content (SOC) in the east area of Huang-Huai-Hai Plain. Four treatments were set up in the experiment: No straw return (NS), Summer maize-season straw return (SS), Winter wheat-season straw return (WS), and Double-season straw return (DS). SOC and aggregates classified by wet screening in 0-40 cm soil layers were measured. The straw return significantly decreased the soil bulk density and the mass proportion of micro-aggregate (< 0.25 mm), and increased the macro-aggregate of >5 mm, 5-2 mm, and 1-0.5 mm by 57.2%, 25.0%, and 13.7% on average suggesting straw return could accelerate soil aggregation and aggregate stability. MWD increased by 22.7%. Meanwhile, straw return not only increase SOC in 0-30 cm layers by 4.0% to 20.7%, and SCS by 0.2% to 14.7%, but also markedly increased the SOC of aggregates and carbon preservation capacity. The straw returning amount was correlated related with SOC, and SOC was positively correlated with MWD in 0-30 cm soil layers. In the 30-40 cm soil layer, both SOC of aggregates and carbon preservation capacity among treatments were not significantly different. The highest grain yield was observed in DS with the increased annual crop yield by 14.3%. Consequently, the double-season straw return model is a good option for improving soil quality in winter wheat-summer maize rotation systems; however, single-straw incorporation could maintain higher soil production, and provide abundant straw feed, energy and raw materials. |
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| Keywords: | annual straw return model aggregate organic carbon yield |
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