不同冬季覆盖作物对双季稻田土壤有机碳的影响

发布时间：2018-04-18 23:10

本文选题：冬季覆盖作物 + 总有机碳　；参考：《应用生态学报》2017年02期

【摘要】：以冬闲-双季稻种植模式为对照(CK),分析了黑麦草-双季稻(Ry)、紫云英-双季稻(Mv)、马铃薯-双季稻(Po)和油菜-双季稻(Ra)5种不同种植模式下冬季覆盖作物秸秆还田后对0~5、5~10、10~20 cm土壤有机碳、活性有机碳、碳库管理指数和有机碳储量的影响.结果表明:与CK处理相比,黑麦草、紫云英、马铃薯和油菜秸秆还田处理均提高了稻田0~5、5~10、10~20 cm土壤总有机碳和活性有机碳含量,其中Po处理最高.冬季覆盖作物秸秆还田均提高了稻田不同层次土壤的碳库活度、碳库活度指数、碳库指数和土壤碳库管理指数,其大小顺序均表现为PoMvRyRaCK.不同冬季覆盖作物秸秆还田处理与CK处理相比均有利于提高稻田不同层次土壤有机碳储量,其中以紫云英秸秆还田的效果最好,黑麦草和马铃薯次之;各处理稻田土壤有机碳储量均随土壤深度的增加而递增.
[Abstract]:The planting pattern of winter fallow double cropping rice as control (CK), analysis of ryegrass double cropping rice (Ry), the Chinese milk vetch rice (Mv), potato double cropping rice (Po) and rape - Rice (Ra) of 5 different planting pattern of winter cover crop straws in 0~5,5~10,10~20 cm soil organic carbon, labile organic carbon and the effects of carbon management index and organic carbon storage. The results showed that: compared with CK, ryegrass, milk vetch, potato and rape straw treatment increased the rice 0~5,5~10,10~20 cm soil total organic carbon and labile organic carbon content, the Po treatment was highest. The winter cover crop straw returning significantly increased in different soil layers in paddy field the carbon pool activity, carbon pool activity index, carbon pool index and soil carbon pool management index, the size of the order of PoMvRyRaCK. was different winter cover crop straw treatment compared with the CK treatment are beneficial to the improvement of rice Organic carbon storage in different soil layers in the field, which had the best effect of Astragalus sinicus straw, ryegrass and potato secondary; organic carbon storage of paddy soil treatments were increased with soil depth increasing.

【作者单位】：湖南省土壤肥料研究所;
【基金】：国家公益性行业(农业)科研专项(201503123) 国家自然科学基金项目(31571591) 中南大学硕士生自主创新项目(2016zzts587)资助~~
【分类号】：S153.6

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