Journal of Integrative Agriculture ›› 2014, Vol. 13 ›› Issue (8): 1772-1781.DOI: 10.1016/S2095-3119(13)60565-1

• 论文 • 上一篇    下一篇

Effects of Long-Term Winter Planted Green Manure on Distribution and Storage of Organic Carbon and Nitrogen in Water-Stable Aggregates of Reddish Paddy Soil Under a Double-Rice Cropping System

 YANG Zeng-ping, ZHENG Sheng-xian, NIE Jun, LIAO Yu-lin, XIE Jian   

  1. 1、Soil and Fertilizer Institute of Hunan Province, Hunan Academy of Agricultural Sciences, Changsha 410125, P.R.China
    2、Scientific Observing and Experimental Station of Arable Land Con servation (Hunan), Ministry of Agriculture, Changsha 410125, P. R.China
  • 收稿日期:2013-02-05 出版日期:2014-08-01 发布日期:2014-08-02
  • 通讯作者: ZHENG Sheng-xian, Tel: +86-731-84691576, Fax: +86-731-84691581, E-mail: shengxianzheng@foxmail.com
  • 作者简介:YANG Zeng-ping, Mobile: 18975161396, E-mail: yzp55168@163.com
  • 基金资助:

    This research was funded by the Special Fund for Agro- Scientific Research in the Public Interest of China (201103005- 08, 201203030). The work was also supported in partial by the Key Technologies R&D Program of China during the 12th Five -Year Plan period (2012BAD05B05-3, 2013BAD07B11) and the International Plant Nutrition Institute, Canada (IPNI China Program: Hunan-17).

Effects of Long-Term Winter Planted Green Manure on Distribution and Storage of Organic Carbon and Nitrogen in Water-Stable Aggregates of Reddish Paddy Soil Under a Double-Rice Cropping System

 YANG Zeng-ping, ZHENG Sheng-xian, NIE Jun, LIAO Yu-lin, XIE Jian   

  1. 1、Soil and Fertilizer Institute of Hunan Province, Hunan Academy of Agricultural Sciences, Changsha 410125, P.R.China
    2、Scientific Observing and Experimental Station of Arable Land Con servation (Hunan), Ministry of Agriculture, Changsha 410125, P. R.China
  • Received:2013-02-05 Online:2014-08-01 Published:2014-08-02
  • Contact: ZHENG Sheng-xian, Tel: +86-731-84691576, Fax: +86-731-84691581, E-mail: shengxianzheng@foxmail.com
  • About author:YANG Zeng-ping, Mobile: 18975161396, E-mail: yzp55168@163.com
  • Supported by:

    This research was funded by the Special Fund for Agro- Scientific Research in the Public Interest of China (201103005- 08, 201203030). The work was also supported in partial by the Key Technologies R&D Program of China during the 12th Five -Year Plan period (2012BAD05B05-3, 2013BAD07B11) and the International Plant Nutrition Institute, Canada (IPNI China Program: Hunan-17).

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摘要： In agricultural systems, maintenance of soil organic matter has long been recognized as a strategy to reduce soil degradation. Manure amendments and green manures are management practices that can increase some nutrient contents and improve soil aggregation. We investigated the effects of 28 yr of winter planted green manure on soil aggregate-size distribution and aggregateassociated carbon (C) and nitrogen (N). The study was a randomized completed block design with three replicates. The treatments included rice-rice-fallow, rice-rice-rape, rice-rice-Chinese milk vetch and rice-rice-ryegrass. The experiment was established in 1982 on a silty light clayey paddy soil derived from Quaternary red clay (classified as Fe-Accumuli-Stagnic Anthrosols) with continuous early and late rice. In 2009, soil samples were collected (0-15 cm depth) from the field treatment plots and separated into water-stable aggregates of different sizes (i.e., >5, 2-5, 1-2, 0.5-1, 0.25-0.5 and <0.25 mm) by wet sieving. The long-term winter planted green manure significantly increased total C and N, and the formation of the 2-5-mm water-stable aggregate fraction. Compared with rice-rice-rape, rice-rice-Chinese milk vetch and rice-rice-ryegrass, the rice-rice-fallow significantly reduced 2-5-mm water-stable aggregates, with a significant redistribution of aggregates into micro-aggregates. Long-term winter planted green manure obviously improved C/N ratio and macro-aggregate-associated C and N. The highest contribution to soil fertility was from macro-aggregates of 2-5 mm in most cases.

关键词: green manure , organic carbon , reddish paddy soil , total nitrogen , water-stable aggregates

Abstract: In agricultural systems, maintenance of soil organic matter has long been recognized as a strategy to reduce soil degradation. Manure amendments and green manures are management practices that can increase some nutrient contents and improve soil aggregation. We investigated the effects of 28 yr of winter planted green manure on soil aggregate-size distribution and aggregateassociated carbon (C) and nitrogen (N). The study was a randomized completed block design with three replicates. The treatments included rice-rice-fallow, rice-rice-rape, rice-rice-Chinese milk vetch and rice-rice-ryegrass. The experiment was established in 1982 on a silty light clayey paddy soil derived from Quaternary red clay (classified as Fe-Accumuli-Stagnic Anthrosols) with continuous early and late rice. In 2009, soil samples were collected (0-15 cm depth) from the field treatment plots and separated into water-stable aggregates of different sizes (i.e., >5, 2-5, 1-2, 0.5-1, 0.25-0.5 and <0.25 mm) by wet sieving. The long-term winter planted green manure significantly increased total C and N, and the formation of the 2-5-mm water-stable aggregate fraction. Compared with rice-rice-rape, rice-rice-Chinese milk vetch and rice-rice-ryegrass, the rice-rice-fallow significantly reduced 2-5-mm water-stable aggregates, with a significant redistribution of aggregates into micro-aggregates. Long-term winter planted green manure obviously improved C/N ratio and macro-aggregate-associated C and N. The highest contribution to soil fertility was from macro-aggregates of 2-5 mm in most cases.

Key words: green manure , organic carbon , reddish paddy soil , total nitrogen , water-stable aggregates