Net energy yield and carbon footprint of summer corn under different N fertilizer rates in the North China Plain

doi:10.1016/S2095-3119(15)61042-5

Journal of Integrative Agriculture ›› 2015, Vol. 14 ›› Issue (8): 1534-1541.DOI: 10.1016/S2095-3119(15)61042-5

Net energy yield and carbon footprint of summer corn under different N fertilizer rates in the North China Plain

WANG Zhan-biao, WEN Xin-ya, ZHANG Hai-lin, LU Xiao-hong, CHEN Fu

College of Agronomy and Biotechnology, China Agricultural University/Key Laboratory of Farming System, Ministry of Agriculture, Beijing 100193, P.R.China

收稿日期:2015-03-16 出版日期:2015-08-05 发布日期:2015-08-06
通讯作者: CHEN Fu, Tel/Fax: +86-10-62733316,E-mail: chenfu@cau.edu.cn
作者简介:These authors contributed equally to this study
基金资助:
This work was supported by the National Basic Research Program of China (973 Program, 2010CB951502) and the Special Fund for Agro-Scientific Research in the Public Interest in China (201103001).

Net energy yield and carbon footprint of summer corn under different N fertilizer rates in the North China Plain

WANG Zhan-biao, WEN Xin-ya, ZHANG Hai-lin, LU Xiao-hong, CHEN Fu

College of Agronomy and Biotechnology, China Agricultural University/Key Laboratory of Farming System, Ministry of Agriculture, Beijing 100193, P.R.China

Received:2015-03-16 Online:2015-08-05 Published:2015-08-06
Contact: CHEN Fu, Tel/Fax: +86-10-62733316,E-mail: chenfu@cau.edu.cn
About author:These authors contributed equally to this study
Supported by:
This work was supported by the National Basic Research Program of China (973 Program, 2010CB951502) and the Special Fund for Agro-Scientific Research in the Public Interest in China (201103001).

摘要/Abstract

摘要： Excessive use of N fertilizer in intensive agriculture can increase crop yield and at the same time cause high carbon (C) emissions. This study was conducted to determine optimized N fertilizer application for high grain yield and lower C emissions in summer corn (Zea mays L.). A field experiment, including 0 (N0), 75 (N75), 150 (N150), 225 (N225), and 300 (N300) kg N ha–1 treatments, was carried out during 2010–2012 in the North China Plain (NCP). The results showed that grain yield, input energy, greenhouse gas (GHG) emissions, and carbon footprint (CF) were all increased with the increase of N rate, except net energy yield (NEY). The treatment of N225 had the highest grain yield (10 364.7 kg ha–1) and NEY (6.8%), but the CF (0.25) was lower than that of N300, which indicates that a rate of 225 kg N ha–1 can be optimal for summer corn in NCP. Comparing GHG emision compontents, N fertilizer (0–51.1%) was the highest and followed by electricity for irrigation (19.73–49.35%). We conclude that optimazing N fertilizer application rate and reducing electricity for irrigation are the two key measures to increase crop yield, improve energy efficiency and decrease GHG emissions in corn production.

关键词: maize , nitrogen fertilizer rate , grain yield , net energy ratio , greenhouse gas emissions

Abstract: Excessive use of N fertilizer in intensive agriculture can increase crop yield and at the same time cause high carbon (C) emissions. This study was conducted to determine optimized N fertilizer application for high grain yield and lower C emissions in summer corn (Zea mays L.). A field experiment, including 0 (N0), 75 (N75), 150 (N150), 225 (N225), and 300 (N300) kg N ha–1 treatments, was carried out during 2010–2012 in the North China Plain (NCP). The results showed that grain yield, input energy, greenhouse gas (GHG) emissions, and carbon footprint (CF) were all increased with the increase of N rate, except net energy yield (NEY). The treatment of N225 had the highest grain yield (10 364.7 kg ha–1) and NEY (6.8%), but the CF (0.25) was lower than that of N300, which indicates that a rate of 225 kg N ha–1 can be optimal for summer corn in NCP. Comparing GHG emision compontents, N fertilizer (0–51.1%) was the highest and followed by electricity for irrigation (19.73–49.35%). We conclude that optimazing N fertilizer application rate and reducing electricity for irrigation are the two key measures to increase crop yield, improve energy efficiency and decrease GHG emissions in corn production.

Key words: maize , nitrogen fertilizer rate , grain yield , net energy ratio , greenhouse gas emissions

WANG Zhan-biao, WEN Xin-ya, ZHANG Hai-lin, LU Xiao-hong, CHEN Fu. Net energy yield and carbon footprint of summer corn under different N fertilizer rates in the North China Plain[J]. Journal of Integrative Agriculture, 2015, 14(8): 1534-1541.

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Net energy yield and carbon footprint of summer corn under different N fertilizer rates in the North China Plain

Net energy yield and carbon footprint of summer corn under different N fertilizer rates in the North China Plain

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