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| Effects of Different Soil Amendments on Greenhouse Gas Emissions from a Cold Waterlogged Paddy Field |
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| KeyWord:cold waterlogged paddy field; biochar; greenhouse gas（GHG）; emissions |
| Author Name | Affiliation | | SHAO Ling-ling | College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China
Institute of Environment, Resource, Soil & Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China | | ZOU Ping | Institute of Environment, Resource, Soil & Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China | | YANG Sheng-mao | Institute of Environment, Resource, Soil & Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
Zhejiang Biochar Engineering and Technology Research Center, Hangzhou 310021, China | | YE Jing | Institute of Environment, Resource, Soil & Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China | | TAO Lin-fu | Agricultural Office of Yuqian town in Lin′an City, Zhejiang Province, Lin′an 311311, China | | YU Qiao-gang | Institute of Environment, Resource, Soil & Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China | | FU Jian-rong | Institute of Environment, Resource, Soil & Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China |
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| Abstract: |
| A rice field experiment was conducted to explore the effects of quicklime, rice straw and bamboo biochar applications on the greenhouse gas（GHG） emissions, soil physical-chemical properties and rice yields in a typical cold waterlogged paddy field in Lin′an mountain area, Zhejiang Province. Conventional fertilization without amendments served as a control（CK）. Rice yields and soil fertility were generally improved with all amendment treatments as compared with CK. Rice yields were 7 728.25 kg·hm-2 in the rice straw treatment, while 6 685.84 kg·hm-2 in CK. Compared with CK, soil total nitrogen, available phosphorus and available potassium contents in the biochar treatment increased 15.1%, 49.0% and 22.1%, respectively. Cumulative CH4 emissions were increased by 21.9% in the quicklime treatment, but decreased by 33.3% in the bamboo biochar treatment in comparison with CK. Such effects could be attributed to increased soil temperature and thus microbial activity by quicklime, and improved soil aeration and methane oxidation by bamboo biochar. However, nitrous oxide fluxes and cumulative emissions were quite low in all treatments, might due to low nitrification and denitrification from long-term anaerobic condition with cold water. These results could shed light on reclamation of cold waterlogged paddy fields with aim at high yield as well as reduced GHG emission. |
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