Journal of Integrative Agriculture ›› 2014, Vol. 13 ›› Issue (6): 1363-1372.DOI: 10.1016/S2095-3119(13)60509-2

• 论文 • 上一篇    下一篇

Soil Nitrous Oxide Emissions Under Maize-Legume Intercropping System in the North China Plain

 HUANG Jian-xiong, CHEN Yuan-quan, SUI Peng, NIE Sheng-wei, GAO Wang-sheng   

  1. 1、Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China
    2、National Key Field Scientific Observation Station of Zhengzhou Fluvo-aquic Soils Ecology Environment, Ministry of Agriculture/Institute of
    Plant nutrient and Environmental Resources, Henan Academy of Ag ricultural Science, Zhengzhou 450002, P.R.China
  • 收稿日期:2013-02-05 出版日期:2014-06-01 发布日期:2014-06-06
  • 通讯作者: GAO Wang-sheng, Tel/Fax: +86-10-62731163, E-mail: wshgao@cau.edu.cn
  • 作者简介:HUANG Jian-xiong, E-mail: lmc172@163.com
  • 基金资助:

    This study was supported by the National Key Technologies R & D Program of China (2011BAD16B15 and 2012BAD14B03).

Soil Nitrous Oxide Emissions Under Maize-Legume Intercropping System in the North China Plain

 HUANG Jian-xiong, CHEN Yuan-quan, SUI Peng, NIE Sheng-wei, GAO Wang-sheng   

  1. 1、Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China
    2、National Key Field Scientific Observation Station of Zhengzhou Fluvo-aquic Soils Ecology Environment, Ministry of Agriculture/Institute of
    Plant nutrient and Environmental Resources, Henan Academy of Ag ricultural Science, Zhengzhou 450002, P.R.China
  • Received:2013-02-05 Online:2014-06-01 Published:2014-06-06
  • Contact: GAO Wang-sheng, Tel/Fax: +86-10-62731163, E-mail: wshgao@cau.edu.cn
  • About author:HUANG Jian-xiong, E-mail: lmc172@163.com
  • Supported by:

    This study was supported by the National Key Technologies R & D Program of China (2011BAD16B15 and 2012BAD14B03).

摘要: Many studies have focused on various agricultural management measures to reduce agricultural nitrous oxide (N2O) emission. However, few studies have investigated soil N2O emissions in intercropping systems in the North China Plain. Thus, we conducted a field experiment to compare N2O emissions under monoculture and maize-legume intercropping systems. In 2010, five treatments, including monocultured maize (M), maize-peanut (MP), maize-alfalfa (MA), maize-soybean (MS), and maize-sweet clover (MSC) intercropping were designed to investigate this issue using the static chamber technique. In 2011, M, MP, and MS remained, and monocultured peanuts (P) and soybean (S) were added to the trial. The results showed that total production of N2O from different treatments ranged from (0.87±0.12) to (1.17±0.11) kg ha-1 in 2010, while those ranged from (3.35±0.30) to (9.10±2.09) kg ha-1 in 2011. MA and MSC had no significant effect on soil N2O production compared to that of M (P<0.05). Cumulative N2O emissions from MP in 2010 were significantly lower than those from M, but the result was the opposite in 2011 (P<0.05). MS significantly reduced soil N2O emissions by 25.55 and 48.84% in 2010 and 2011, respectively (P<0.05). Soil N2O emissions were significantly correlated with soil water content, soil temperature, nitrification potential, soil NH4 +, and soil NO3 - content (R2=0.160-0.764, P<0.01). A stepwise linear regression analysis indicated that soil N2O release was mainly controlled by the interaction between soil moisture and soil NO3 - content (R2=0.828, P<0.001). These results indicate that MS had a coincident effect on soil N2O flux and significantly reduced soil N2O production compared to that of M over two growing seasons.

关键词: maize , legume , intercropping , soil nitrous oxide , environmental factors

Abstract: Many studies have focused on various agricultural management measures to reduce agricultural nitrous oxide (N2O) emission. However, few studies have investigated soil N2O emissions in intercropping systems in the North China Plain. Thus, we conducted a field experiment to compare N2O emissions under monoculture and maize-legume intercropping systems. In 2010, five treatments, including monocultured maize (M), maize-peanut (MP), maize-alfalfa (MA), maize-soybean (MS), and maize-sweet clover (MSC) intercropping were designed to investigate this issue using the static chamber technique. In 2011, M, MP, and MS remained, and monocultured peanuts (P) and soybean (S) were added to the trial. The results showed that total production of N2O from different treatments ranged from (0.87±0.12) to (1.17±0.11) kg ha-1 in 2010, while those ranged from (3.35±0.30) to (9.10±2.09) kg ha-1 in 2011. MA and MSC had no significant effect on soil N2O production compared to that of M (P<0.05). Cumulative N2O emissions from MP in 2010 were significantly lower than those from M, but the result was the opposite in 2011 (P<0.05). MS significantly reduced soil N2O emissions by 25.55 and 48.84% in 2010 and 2011, respectively (P<0.05). Soil N2O emissions were significantly correlated with soil water content, soil temperature, nitrification potential, soil NH4 +, and soil NO3 - content (R2=0.160-0.764, P<0.01). A stepwise linear regression analysis indicated that soil N2O release was mainly controlled by the interaction between soil moisture and soil NO3 - content (R2=0.828, P<0.001). These results indicate that MS had a coincident effect on soil N2O flux and significantly reduced soil N2O production compared to that of M over two growing seasons.

Key words: maize , legume , intercropping , soil nitrous oxide , environmental factors