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| Effects of Rice Straw and Winter Green Manure Incorporations on Grain Yields and Methane Emissions of Double-Season Rice(Oryza sativa) Field in South China |
| Received:October 23, 2014 |
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| KeyWord:rice;straw incorporation;winter green manure;grain yield;methane emission |
| Author Name | Affiliation | E-mail | | TIAN Ka | Rice Research Institute of Guangdong Academy of Agricultural Sciences,Guangzhou 510640,China
Guangdong Key Laboralory of New Technology for Rice Breeding, Guangzhou 510640,China | | | ZHANG Li | Institute of Applied Ecology, Nanjing Agricultural University, Nanjing 210095, China | | | ZHONG Xu-hua | Rice Research Institute of Guangdong Academy of Agricultural Sciences,Guangzhou 510640,China
Guangdong Key Laboralory of New Technology for Rice Breeding, Guangzhou 510640,China | xzhong8@163.com | | HUANG Nong-rong | Rice Research Institute of Guangdong Academy of Agricultural Sciences,Guangzhou 510640,China
Guangdong Key Laboralory of New Technology for Rice Breeding, Guangzhou 510640,China | | | ZHANG Wei-jian | Institute of Applied Ecology, Nanjing Agricultural University, Nanjing 210095, China | | | PAN Jun-feng | Rice Research Institute of Guangdong Academy of Agricultural Sciences,Guangzhou 510640,China
Guangdong Key Laboralory of New Technology for Rice Breeding, Guangzhou 510640,China | |
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| Abstract: |
| Rice straw and winter green manure incorporations are two common practices to improve soil fertility and increase grain yields in rice farming systems in South China. However, they may also enhance CH4 emissions from the paddy fields due to carbon inputs. This experiment was designed to investigate the effects of rice straw and winter green manure additions on grain yields and methane emissions of paddy fields with double-season rice in South China. Compared to zero-straw treatment, incorporating whole rice straw significantly enhanced both dry matter production and spikelets per panicle, and thus the yield of rice grains by 4.8%. Meanwhile, straw incorporation significantly stimulated CH4 emissions, which was 41.8% higher than in zero-straw treatments. Applying winter green manure significantly increased grain yield by 3.6%, but did not significantly affect CH4 emissions, compared to the no green manure control. There were no significant interactions between straw incorporation and green manure. Our results suggest that winter green manure would be a promising practice for low-carbon emission and high-yield rice production in South China. |
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