Impacts of Fertilization Alternatives and Crop Straw Incorporation on N2O Emissions from a Spring Maize Field in Northeastern China

IMR OpenIR

	Impacts of Fertilization Alternatives and Crop Straw Incorporation on N2O Emissions from a Spring Maize Field in Northeastern China
其他题名	Impacts of Fertilization Alternatives and Crop Straw Incorporation on N2O Emissions from a Spring Maize Field in Northeastern China
	Yang Li 1; Wang Ligang 1; Li Hu 1; Qiu Jianjun 1; Liu Huiying 2
	2014
发表期刊	JOURNAL OF INTEGRATIVE AGRICULTURE
ISSN	2095-3119
卷号	13 期号:4 页码:881-892
摘要	Spring maize is one of the most popular crops planted in northeastern China. The cropping systems involving spring maize have been maintaining high production through intensive management practices. However, the high rates of nitrogen (N) fertilizers application could have introduced a great amount of nitrous oxide (N2O) into the atmosphere. It is crucial for sustaining the maize production systems to reduce N2O emissions meanwhile maintaining the optimum yields by adopting alternative farming management practices. The goal of this study was to evaluate effects of alternative fertilization and crop residue management practices on N2O emission as well as crop yield for a typical maize field in northeastern China. Field experiments were conducted during the 2010-2011 maize growing seasons (from early May to late September) in Liaoning Province, northeastern China. N2O fluxes were measured at the field plots with six different treatments including no N fertilizer use (CK), farmers' conventional N fertilizer application rate (FP), reduced N fertilizer rate (OPT), reduced N fertilizer rate combined with crop straw amendment (OPTS), slow-release N fertilizer (CRF), and reduced N fertilizer rate combined with nitrification inhibitor (OPT+DCD). The static chamber method combined with gas chromatography technique was employed to conduct the measurements of N2O fluxes. The field data showed that N2O emissions varied across the treatments. During the maize growing season in 2010, the total N2O emissions under the treatments of CK, FP, OPT, OPTS, and CRF were 0.63, 1.11, 1.03, 1.26, and 0.98 kg N ha(-1), respectively. The seasonal cumulative N2O emissions were 0.54, 1.07, 0.96, 1.12, and 0.84 kg N ha(-1), respectively, under CK, FP, OPT, OPTS, and OPT+DCD in 2011. In comparison with FP, CRF or OPT+DCD reduced the N2O emissions by 12 or 21%, respectively, while the crop yields remained unchanged. The results indicate that the reduction of N-fertilizer application rate in combination with the slow-release fertilizer type or nitrification inhibitor could effectively mitigate N2O emissions from the tested field. The incorporation of crop residue didn't show positive effect on mitigating N2O emissions from the tested cropping system. The field study can provide useful information for the on-going debate on alternative N fertilization strategies and crop straw management in China. However, further studies would be needed to explore the long-term impacts of the alternative management practices on a wide range of environmental services.
其他摘要	Spring maize is one of the most popular crops planted in northeastern China. The cropping systems involving spring maize have been maintaining high production through intensive management practices. However, the high rates of nitrogen (N) fertilizers application could have introduced a great amount of nitrous oxide (N_2O) into the atmosphere. It is crucial for sustaining the maize production systems to reduce N_2O emissions meanwhile maintaining the optimum yields by adopting alternative farming management practices. The goal of this study was to evaluate effects of alternative fertilization and crop residue management practices on N_2O emission as well as crop yield for a typical maize field in northeastern China. Field experiments were conducted during the 2010-2011 maize growing seasons (from early May to late September) in Liaoning Province, northeastern China. N_2O fluxes were measured at the field plots with six different treatments including no N fertilizer use (CK), farmers’ conventional N fertilizer application rate (FP), reduced N fertilizer rate (OPT), reduced N fertilizer rate combined with crop straw amendment (OPTS), slow-release N fertilizer (CRF), and reduced N fertilizer rate combined with nitrification inhibitor (OPT+DCD). The static chamber method combined with gas chromatography technique was employed to conduct the measurements of N_2O fluxes. The field data showed that N_2O emissions varied across the treatments. During the maize growing season in 2010, the total N_2O emissions under the treatments of CK, FP, OPT, OPTS, and CRF were 0.63, 1.11, 1.03, 1.26, and 0.98 kg N ha~(-1), respectively. The seasonal cumulative N2O emissions were 0.54, 1.07, 0.96, 1.12, and 0.84 kg N ha~(-1), respectively, under CK, FP, OPT, OPTS, and OPT+DCD in 2011. In comparison with FP, CRF or OPT+DCD reduced the N_2O emissions by 12 or 21%, respectively, while the crop yields remained unchanged. The results indicate that the reduction of N-fertilizer application rate in combination with the slow-release fertilizer type or nitrification inhibitor could effectively mitigate N_2O emissions from the tested field. The incorporation of crop residue didn’t show positive effect on mitigating N_2O emissions from the tested cropping system. The field study can provide useful information for the on-going debate on alternative N fertilization strategies and crop straw management in China. However, further studies would be needed to explore the long-term impacts of the alternative management practices on a wide range of environmental services.
关键词	NITROUS-OXIDE EMISSIONS AVAILABLE MEASUREMENT DATA GREENHOUSE-GAS MITIGATION NITRIFICATION INHIBITOR CARBON SEQUESTRATION USE EFFICIENCY SOIL RESIDUES MANAGEMENT SYSTEMS nitrogen fertilization straw incorporation nitrous oxide crop yield spring maize
收录类别	CSCD
语种	英语
资助项目	[National Natural Science Foundation of China] ; [Special Fund for Agriculture Scientific Non-Profit Research of China] ; [National Basic Research Program of China] ; [National Nonprofit Institute Research Grant of Chinese Academy of Agricultural Sciences]
CSCD记录号	CSCD:5130077
引用统计	被引频次：7[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/90070
专题	中国科学院金属研究所
作者单位	1.Chinese Acad Agr Sci, Institute Agr Resources & Reg Planning, CAAS UNH Joint Lab Sustainable Agroecosyst Res, Key Lab Non Point Source Pollut Control,Minist Ag, Beijing 100081, Peoples R China Institute Agr Resources & Reg Planning CAAS UNH Joint Lab Sustainable Agroecosyst Res Key Lab Non Point Source Pollut Control,Minist Ag 2.中国科学院金属研究所
推荐引用方式 GB/T 7714	Yang Li,Wang Ligang,Li Hu,et al. Impacts of Fertilization Alternatives and Crop Straw Incorporation on N2O Emissions from a Spring Maize Field in Northeastern China[J]. JOURNAL OF INTEGRATIVE AGRICULTURE,2014,13(4):881-892.
APA	Yang Li,Wang Ligang,Li Hu,Qiu Jianjun,&Liu Huiying.(2014).Impacts of Fertilization Alternatives and Crop Straw Incorporation on N2O Emissions from a Spring Maize Field in Northeastern China.JOURNAL OF INTEGRATIVE AGRICULTURE,13(4),881-892.
MLA	Yang Li,et al."Impacts of Fertilization Alternatives and Crop Straw Incorporation on N2O Emissions from a Spring Maize Field in Northeastern China".JOURNAL OF INTEGRATIVE AGRICULTURE 13.4(2014):881-892.