Journal of Integrative Agriculture ›› 2014, Vol. 13 ›› Issue (3): 570-576.DOI: 10.1016/S2095-3119(13)60714-5

• 论文 • 上一篇    下一篇

Effects of Long-Term Organic Amendments on Soil Organic Carbon in a Paddy Field: A Case Study on Red Soil

 HUANG Qing-hai, LI Da-ming, LIU Kai-lou, YU Xi-chu, YE Hui-cai, HU Hui-wen, XU Xiao-lin   

  1. 1、National Engineering and Technology Research Center for Red Soil Improvement, Jiangxi Institute of Red Soil, Jinxian 331717, P.R.China
    2、Key Laboratory of Crop Nutrition and Fertilization, Ministry of Agricultural/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China
  • 收稿日期:2013-10-09 出版日期:2014-03-01 发布日期:2014-03-12
  • 通讯作者: HUANG Qing-hai, Tel: +86-791-85537684, Fax: +86-791-85537751, E-mail: hqh0791@vip.sina.com
  • 作者简介:HUANG Qing-hai, Tel: +86-791-85537684, Fax: +86-791-85537751, E-mail: hqh0791@vip.sina.com
  • 基金资助:

    This research was supported by the Special Fund for Agro- scientific Research in the Public Interest (201203030 and 201003016), the National Basic Research Program of China (973 Program, 2011CB100501-S06) and the National Natural Science Foundation of China (41301269). The authors thank the colleagues in Jiangxi Institute of Red Soil for the contribution to the long-term organic fertilizer field experiment from 1981.

Effects of Long-Term Organic Amendments on Soil Organic Carbon in a Paddy Field: A Case Study on Red Soil

 HUANG Qing-hai, LI Da-ming, LIU Kai-lou, YU Xi-chu, YE Hui-cai, HU Hui-wen, XU Xiao-lin   

  1. 1、National Engineering and Technology Research Center for Red Soil Improvement, Jiangxi Institute of Red Soil, Jinxian 331717, P.R.China
    2、Key Laboratory of Crop Nutrition and Fertilization, Ministry of Agricultural/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China
  • Received:2013-10-09 Online:2014-03-01 Published:2014-03-12
  • Contact: HUANG Qing-hai, Tel: +86-791-85537684, Fax: +86-791-85537751, E-mail: hqh0791@vip.sina.com
  • About author:HUANG Qing-hai, Tel: +86-791-85537684, Fax: +86-791-85537751, E-mail: hqh0791@vip.sina.com
  • Supported by:

    This research was supported by the Special Fund for Agro- scientific Research in the Public Interest (201203030 and 201003016), the National Basic Research Program of China (973 Program, 2011CB100501-S06) and the National Natural Science Foundation of China (41301269). The authors thank the colleagues in Jiangxi Institute of Red Soil for the contribution to the long-term organic fertilizer field experiment from 1981.

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摘要： Soil organic carbon (SOC) is one of the main carbon reservoirs in the terrestrial ecosystem. It is important to study SOC dynamics and effects of organic carbon amendments in paddy fields because of their vest expansion in south China. A study was carried out to evaluate the relationship between the SOC content and organic carbon input under various organic amendments at a long-term fertilization experiment that was established on a red soil under a double rice cropping system in 1981. The treatments included non-fertilization (CK), nitrogen-phosphorus-potassium fertilization in early rice only (NPK), green manure (Astragalus sinicus L.) in early rice only (OM1), high rate of green manure in early rice only (OM2), combined green manure in early rice and farmyard manure in late rice (OM3), combined green manure in early rice, farmyard manure in late rice and rice straw mulching in winter (OM4), combined green manure in early rice and rice straw mulching in winter (OM5). Our data showed that the SOC content was the highest under OM3 and OM4, followed by OM1, OM2 and OM5, then NPK fertilization, and the lowest under non-fertilization. However, our analyses in SOC stock indicated a significant difference between OM3 (33.9 t ha-1) and OM4 (31.8 t ha-1), but no difference between NPK fertilization (27 t ha-1) and nonfertilization (28.1 t ha-1). There was a significant linear increase in SOC over time for all treatments, and the slop of linear equation was greater in organic manure treatments (0.276-0.344 g kg-1 yr-1) than in chemical fertilizer (0.216 g kg-1 yr-1) and no fertilizer (0.127 g kg-1 yr-1).

关键词: long-term field experiment , organic amendments , soil organic carbon , paddy soil derived from red earth

Abstract: Soil organic carbon (SOC) is one of the main carbon reservoirs in the terrestrial ecosystem. It is important to study SOC dynamics and effects of organic carbon amendments in paddy fields because of their vest expansion in south China. A study was carried out to evaluate the relationship between the SOC content and organic carbon input under various organic amendments at a long-term fertilization experiment that was established on a red soil under a double rice cropping system in 1981. The treatments included non-fertilization (CK), nitrogen-phosphorus-potassium fertilization in early rice only (NPK), green manure (Astragalus sinicus L.) in early rice only (OM1), high rate of green manure in early rice only (OM2), combined green manure in early rice and farmyard manure in late rice (OM3), combined green manure in early rice, farmyard manure in late rice and rice straw mulching in winter (OM4), combined green manure in early rice and rice straw mulching in winter (OM5). Our data showed that the SOC content was the highest under OM3 and OM4, followed by OM1, OM2 and OM5, then NPK fertilization, and the lowest under non-fertilization. However, our analyses in SOC stock indicated a significant difference between OM3 (33.9 t ha-1) and OM4 (31.8 t ha-1), but no difference between NPK fertilization (27 t ha-1) and nonfertilization (28.1 t ha-1). There was a significant linear increase in SOC over time for all treatments, and the slop of linear equation was greater in organic manure treatments (0.276-0.344 g kg-1 yr-1) than in chemical fertilizer (0.216 g kg-1 yr-1) and no fertilizer (0.127 g kg-1 yr-1).

Key words: long-term field experiment , organic amendments , soil organic carbon , paddy soil derived from red earth