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Effects of Water‐Washed Biochar on Soil Properties, Greenhouse Gas Emissions, and Rice Yield
Author(s) -
Lu Haohao,
Wang Yaofeng,
Liu Yuxue,
Wang Yuying,
He Lili,
Zhong Zheke,
Yang Shengmao
Publication year - 2018
Publication title -
clean – soil, air, water
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 66
eISSN - 1863-0669
pISSN - 1863-0650
DOI - 10.1002/clen.201700143
Subject(s) - biochar , bamboo , greenhouse gas , carbon sequestration , soil water , chemistry , slash and char , charcoal , environmental chemistry , environmental science , agronomy , carbon dioxide , soil science , pyrolysis , materials science , ecology , organic chemistry , composite material , biology
Biochar application might be a newly agricultural method for improving soil quality and carbon sequestration by its special physical and chemical properties, which has generated great interest for scientists and policy makers. However, the physical structure of biochar and its effect on N 2 O and CH 4 emissions are not yet clear. The effect of bamboo biochar and water‐washed bamboo biochar with or without N fertilization on greenhouse gas emissions, soil properties, and rice yield in a pot experiment were investigated. The results showed that biochar application increased soil pH, total N content, dissolved organic carbon (DOC), and rice plant growth. Although biochar application increased DOC content, N 2 O and CH 4 emissions decreased. The soil N H 4 +and N O 3 −contents were significantly decreased by biochar application, indicating that bamboo biochar has a remarkable ability to absorb N H 4 +and N O 3 − . However, no significant differences in N 2 O emission were observed between biochar and washed biochar treatment. The CH 4 emission in the washed biochar treatment was decreased to a greater extent than in the unwashed biochar, indicating that washed biochar has a greater inhibitory effect on CH 4 emission than does unwashed biochar, and that the stable physical structure of biochar might be an important factor for reducing CH 4 emissions. Additional studies are needed to investigate the role of functional microorganism in order to better understand the biochar on greenhouse gas emissions from paddy soils.