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| Effects of pig-manure biochar on soil nitrification and soil microbial enzyme activity in tea soils |
| Received:June 19, 2020 |
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| KeyWord:pig-manure biochar;greenhouse gases;nitrification;redox enzymes;hydrolysis enzymes |
| Author Name | Affiliation | E-mail | | HE Li-li | Institute of Environmental Resources and Soil Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
Zhejiang Engineering Research Center of Biochar, Hangzhou 310021, China | | | HUANG Jia-jia | Zhejiang Engineering Research Center of Biochar, Hangzhou 310021, China
College of Environmental Sciences, Zhejiang University of Technology, Hangzhou 310014, China | | | LIU Yu-xue | Institute of Environmental Resources and Soil Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
Zhejiang Engineering Research Center of Biochar, Hangzhou 310021, China | | | LÜ Hao-hao | Institute of Environmental Resources and Soil Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
Zhejiang Engineering Research Center of Biochar, Hangzhou 310021, China | | | WANG Yu-ying | Institute of Environmental Resources and Soil Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
Zhejiang Engineering Research Center of Biochar, Hangzhou 310021, China | | | YANG Sheng-mao | Institute of Environmental Resources and Soil Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
Zhejiang Engineering Research Center of Biochar, Hangzhou 310021, China
College of Environmental Sciences, Zhejiang University of Technology, Hangzhou 310014, China | yangshengmao@263.net |
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| Abstract: |
| The aim of the present study was to explore the effects of pig-manure biochar on soil nitrification, N2O emissions, and soil microbial enzyme activity in tea-growing soils by conducting a 35-day aerobic incubation experiment. The results showed that pig-manure biochar reduced the acidity of tea soils by significantly increasing soil pH, making the soil more suitable for tea tree growth. Tea trees typically prefer high ammonium, and high nitrification rates are not conductive to the growth of tea plants. The low and medium(BC1+N, BC2+N)biochar application treatments significantly increased soil pH, while having no significant effects on soil nitrification; the high biochar application treatment significantly increased soil net nitrification rate and reduced cumulative N2O emissions by 62.4%. Biochar application significantly increased the activities of fluorescein diacetate hydrolase(FDA), urease, and dehydrogenase in the soil, indicating that appropriate levels of pig manure-biochar application could decrease soil acidity and increase microbial activity in tea soils, thus enhancing the availability of soil nutrients and improving soil quality. |
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