| Autor: |
Yanyu Lin1, Shujuan Yi2 yishujuan_2005@yeah.net, Zhongxue Zhang3, Dan Xu4, Tangzhe Nie5 |
| Předmět: |
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| Zdroj: |
Fresenius Environmental Bulletin. 5/1/2020, Vol. 29 Issue 5, p3885-3893. 9p. |
| Abstrakt: |
Rice field is an important source of greenhouse gas emissions. In order to explore the characteristics of CH4 and N2O emissions from rice field in the Northeast cold region, this paper takes rice field in Qing'an County of Heilongjiang Province as the research object, and three factors as water, nitrogen fertilizer and biocarbon are selects. In this paper, the DNDC model is used to simulate and estimate the CH4 and N2O emissions under traditional management and optimization modes. The results show that the CH4 emissions in the optimized mode reduced by 54.64% compared with the traditional model, which is from rice fields in the county during the growing season. Under the optimized model, the N2O emissions during the growing season of rice fields in the county were reduced by 20.45% compared with the traditional model. The results of sensitivity factor analysis show that the effect of water depth on CH4 emissions from rice field is positively correlated, while the effect on N2O emissions is reversed. The total amount of nitrogen fertilization in the test range showed a certain inhibitory effect on rice field CH4 emissions, and it significantly promoted N2O emissions. The growth of biocarbon would inhibit rice field CH4 and N2O emissions. The results provide a scientific basis, which scientifically estimates greenhouse gas emissions from rice fields in China and formulates strategies to reduce greenhouse gas emissions from cold temperate rice fields. [ABSTRACT FROM AUTHOR] |
| Databáze: |
GreenFILE |
| Externí odkaz: |
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