| 川中丘陵区覆膜栽培再生稻对CH4排放的影响 |
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| 引用本文： | 宋开付,杨玉婷,于海洋,张广斌,徐华,吕世华,马静. 川中丘陵区覆膜栽培再生稻对CH4排放的影响[J]. 生态学报, 2019, 39(19): 7258-7266 |
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| 作者姓名： | 宋开付 杨玉婷 于海洋 张广斌 徐华 吕世华 马静 |
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| 作者单位： | 土壤与农业可持续发展国家重点实验室, 中国科学院南京土壤研究所, 南京 210008;中国科学院大学, 北京 100049,土壤与农业可持续发展国家重点实验室, 中国科学院南京土壤研究所, 南京 210008;中国科学院大学, 北京 100049,土壤与农业可持续发展国家重点实验室, 中国科学院南京土壤研究所, 南京 210008;中国科学院大学, 北京 100049,土壤与农业可持续发展国家重点实验室, 中国科学院南京土壤研究所, 南京 210008,土壤与农业可持续发展国家重点实验室, 中国科学院南京土壤研究所, 南京 210008,农业部西南山地农业环境重点实验室, 四川省农业科学院土壤肥料研究所, 成都 610066,土壤与农业可持续发展国家重点实验室, 中国科学院南京土壤研究所, 南京 210008 |
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| 基金项目： | 国家重点研发计划项目（2017YFD0300105）；农业部西南山地农业环境重点实验室开放基金（AESMA-OPP-2019002）；国家自然科学基金项目（41671241，41571232）；中国科学院南京土壤研究所领域前沿项目（ISSASIP1652，ISSASIP1654） |
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| 摘 要： | 为探讨覆膜栽培再生稻对CH_4排放的影响,采用静态箱-气相色谱法观测了川中丘陵区2016和2017年覆膜条件下再生稻田的CH_4排放通量。试验设置覆膜单季中稻(SR)和覆膜中稻-再生稻(SR-RR)两个处理。结果表明:SR-RR处理中稻季提前出现CH_4排放峰,再生季CH_4排放量少,约占两季总排放的8%—10%。全观测期内SR-RR处理两季的CH_4排放总量为103—306 kg/hm~2,比SR处理的单季排放量高11%—16%(P0.05)。SR-RR处理两季稻谷总产量为10.2—10.4 t/hm~2,比SR处理高出19%—22%(P0.05)。SR-RR处理单位产量的CH_4排放量为9.9—30.1 kg/t、,比SR处理减少6%(P0.05)。覆膜条件下种植再生稻,可保证水稻高产稳产,减少单位产量的CH_4排放量,值得推广。
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| 关 键 词： | 再生稻 CH4排放 地膜覆盖 稻田 产量 |
| 收稿时间： | 2018-08-15 |
| 修稿时间： | 2019-04-30 |
Effects of plastic film mulching cultivation of ratoon rice on CH4 emissions in the hilly area of central Sichuan |
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| Affiliation: | State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;University of Chinese Academy of Sciences, Beijing 100049, China,State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;University of Chinese Academy of Sciences, Beijing 100049, China,State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;University of Chinese Academy of Sciences, Beijing 100049, China,State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China,State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China,Key Laboratory of Agricultural Environment in Southwest Mountain Areas, Ministry of Agriculture, Institute of Soil Fertilizer, Sichuan Agriculture Sciences Academy, Chengdu 610066, China and State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China |
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| Abstract: | To investigate the effects of plastic film mulching (PM) of ratoon rice on CH4 emissions, CH4 fluxes from ratoon paddy fields under PM in the hilly area of central Sichuan in 2016 and 2017 were observed by static chamber-gas chromatography. The experiment was conducted with two treatments:film mulching single rice (SR) and film mulching ratoon rice (SR-RR). The results showed that the peak of CH4 emissions appeared earlier in the main crop season in the SR-RR treatment, and CH4 emissions in the ratoon season was lower, accounting for approximately 8%-10% of the total amount in the two seasons. The total CH4 emissions of the SR-RR treatment in the two seasons was 103-306 kg/hm2 during the full observation period, which was 11%-16% higher than that of the SR treatment (P > 0.05). The total yield of the SR-RR treatment during the two rice seasons was 10.2-10.4 t/hm2, which was 19%-22% (P < 0.05) higher than that of the SR treatment. The CH4 emissions per unit of yield from the SR-RR treatment was 9.9 to 30.1 kgCH4/t grain, which was 6% lower than that of the SR treatment (P < 0.05). Planting ratoon rice under PM can ensure high and stable yield of rice and reduce CH4 emissions per unit of yield, which is worth popularizing. |
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| Keywords: | ratoon rice CH4 emission plastic film mulching cultivation paddy field yield |
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