Effects of different agricultural organic wastes on soil GHG emissions: During a 4-year field measurement in the North China Plain

Zhejin Li; Dong Wang; Peng Sui; Pan Long; Lingling Yan; Xiaolong Wang; Peng Yan; Yawen Shen; Hongcui Dai; Xiaolei Yang; Jixiao Cui; Yuanquan Chen

doi:10.1016/j.wasman.2018.10.008

Effects of different agricultural organic wastes on soil GHG emissions: During a 4-year field measurement in the North China Plain

Waste Manag. 2018 Nov:81:202-210. doi: 10.1016/j.wasman.2018.10.008. Epub 2018 Oct 10.

Authors

Zhejin Li¹, Dong Wang¹, Peng Sui¹, Pan Long², Lingling Yan³, Xiaolong Wang⁴, Peng Yan¹, Yawen Shen¹, Hongcui Dai¹, Xiaolei Yang¹, Jixiao Cui¹, Yuanquan Chen⁵

Affiliations

¹ College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China.
² College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China; College of Agronomy, Hunan Agricultural University, Changsha 410000, China.
³ College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China; Yiyang Agricultural Research Institute, Yiyang 413002, China.
⁴ College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China; College of Agronomy, South China Agricultural University, Guangzhou 510642, China.
⁵ College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China. Electronic address: rardc@163.com.

PMID: 30527036
DOI: 10.1016/j.wasman.2018.10.008

Abstract

Large quantities and many varieties of agricultural organic wastes are produced in China annually. Applying agricultural organic wastes to soil plays an essential role in coping with the environmental pollution from agricultural wastes, solving the energy crisis and responding global climate change. But there is little information available on the effects of different agricultural organic wastes on soil greenhouse gas (GHG) emissions. The objectives of this study were to investigate and compare the impacts of different organic wastes on soil GHG emissions during a 4-year field experiments in the North China Plain, as well as analyze the influential factors that may be related to GHG emissions. The treatments were: crop straw (CS), biogas residue (BR), mushroom residue (MR), wine residue (WR) and pig manure (PM) returning to soil, as well as a control with no organic waste applied to soil but chemical fertilizer addition only (CF). The results showed that compared with CF treatment, organic material applied to soil significantly increased GHG emissions and emissions followed the order of WR(27,961.51 kg CO₂-eq/ha/yr) > PM(26,376.50 kg CO₂-eq/ha/yr) > MR(23,366.60 kg CO₂-eq/ha/yr) > CS(22,434.44 kg CO₂-eq/ha/yr) > BR (22,029.04 kg CO₂-eq/ha/yr) > CF(17,402.77 kg CO₂-eq/ha/yr), averagely. And considering the affecting factors, GHG emissions were significantly related to soil temperature and soil water content. Different organic wastes also affected soil total organic carbon (TOC), microbial carbon (MBC) and dissolved organic carbon (DOC) contents, which related to GHG emissions. Further analysis showed that characteristics of organic wastes affected GHG emissions, which included C-N ratio, lignin, polyphenol, cellulose and hemicellulose. Our study demonstrates that biogas residue returning to soil emitted minimum GHG emissions among these different types of organic wastes, which provided a better solution for applying organic wastes to mitigate soil GHG emissions.

Keywords: Characteristics of organic wastes; Cropping system; Emission factors; North China Plain; Organic wastes; Soil GHG emission.

MeSH terms

Agriculture*
Carbon / analysis
China
Greenhouse Gases*
Waste Management*

Substances

Greenhouse Gases
Carbon