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应用生态学报 ›› 2017, Vol. 28 ›› Issue (2): 465-473.doi: 10.13287/j.1001-9332.201702.009

• 中国生态学学会2016年学术年会会议专栏 • 上一篇    下一篇

不同冬季覆盖作物对双季稻田土壤有机碳的影响

唐海明, 程凯凯, 肖小平*, 汤文光, 汪柯, 李超, 张帆, 孙玉桃   

  1. 湖南省土壤肥料研究所, 长沙 410125
  • 收稿日期:2016-06-17 出版日期:2017-02-18 发布日期:2017-02-18
  • 通讯作者: * E-mail: hntfsxxping@163.com
  • 作者简介:唐海明, 男, 1980年生, 博士, 副研究员. 主要从事耕作生态与农作制研究. E-mail: tanghaiming66@163.com
  • 基金资助:
    本文由国家公益性行业(农业)科研专项(201503123)、国家自然科学基金项目(31571591)和中南大学硕士生自主创新项目(2016zzts587)资助

Effects of different winter cover crops on soil organic carbon in a double cropping rice paddy field.

TANG Hai-ming, CHENG Kai-kai, XIAO Xiao-ping*, TANG Wen-guang, WANG Ke, LI Chao, ZHANG Fan, SUN Yu-tao   

  1. Hunan Soil and Fertilizer Institute, Changsha 410125, China.
  • Received:2016-06-17 Online:2017-02-18 Published:2017-02-18
  • Contact: * E-mail: hntfsxxping@163.com
  • Supported by:
    This work was supported by the Special Fund for the Scientific Research in the Public Interest of Agriculture (201503123), the National Natural Science Foundation of China (31571591), and the Central South University Master’s Independent Innovation Project (2016zzts587).

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Po>Mv>Ry>Ra>CK.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: In a double cropping rice field experiment, effects of five winter cover crops on the total organic carbon (TOC), active organic carbon (AOC), carbon pool management index (CPMI) and organic carbon storage were studied in three soil layers (0-5, 5-10 and 10-20 cm).Winter cover crops of ryegrass (Ry), Chinese milk vetch (Mv), potato (Po), and rape (Ra) between two rice crops were compared with fallow as control (CK). The results showed that the TOC and AOC contents under Ry, Mv, Po and Ra treatments were higher than those of CK in all three la-yers. Meanwhile, the TOC and AOC contents in Po treatment were higher than those of other treatments. Compared with CK, the AOC, activity index (AI), carbon pool index (CPI) and CPMI in the soil were improved through the recycling of winter cover crops straw. The AOC, AI, CPI and CPMI in the studied layers increased in order of Po>Mv>Ry>Ra>CK. The results indicated that the recycling of winter cover crops straw promoted the storage of SOC in the 0-20 cm soil profile as compared with CK. The strongest effect of the winter cover crops on the SOC storage occurred in Mv treatment, followed by Mv and Po treatments, and the SOC storage increased with the increasing soil depth.