| 宋开付,于海洋,张广斌,徐华,吕世华,马静.川中丘陵区覆膜再生稻田N2O排放规律研究[J].农业环境科学学报,2019,38(6):1381-1387. |
| 川中丘陵区覆膜再生稻田N2O排放规律研究 |
| N2O emissions from ratoon paddy fields covered with plastic film mulching in the hilly area of central Sichuan, China |
| 投稿时间：2018-11-01 |
| DOI：10.11654/jaes.2018-1368 |
| 中文关键词: 再生稻 N2O排放 地膜覆盖 稻田 产量 |
| 英文关键词: ratoon rice N2O emissions plastic film mulching cultivation paddy field grain yield |
| 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） |
| 作者 | 单位 | E-mail | | 宋开付 | 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 | | | 于海洋 | 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 | | | 张广斌 | 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 | | | 徐华 | 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 | | | 吕世华 | 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 | | | 马静 | 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 | jma@issas.ac.cn |
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| 中文摘要: |
| 为明确覆膜再生稻田N2O排放规律，采用静态箱-气相色谱法原位观测了川中丘陵区覆膜条件下再生稻田的N2O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处理中稻季有两个明显的N2O排放峰，第一个排放峰出现时间较SR处理提前13 d，再生季出现N2O排放最高峰，峰值为1 630.7 μgN·m-2·h-1。全观测期内SR-RR处理N2O排放量为5.63 kgN·hm-2，其中再生季N2O排放量为2.35 kgN·hm-2，约占两季总排放的42%。SR-RR处理两季的N2O排放总量比SR处理的单季排放量高246%（P<0.05）。SR-RR处理两季稻谷总产量为10.4 t·hm-2，其中再生季产量为1.89 t·hm-2，约占两季稻谷总产量的18%，SR-RR处理两季稻谷总产量比SR处理高出22%（P<0.05）。SR-RR处理单位产量的N2O排放量为0.54kgN·t-1，较SR处理增加184%（P<0.05）。研究结果为进一步研究覆膜再生稻田N2O排放规律及寻求有效的减排措施提供数据支撑和科学依据。 |
| 英文摘要: |
| To determine N2O emissions patterns of plastic film mulching (PM) in ratoon paddy fields, this study used static chamber-gas chromatography to observe ratoon paddy fields in the hilly area of central Sichuan. The experiment was conducted with two treatments including film mulching of single rice (SR) and film mulching of single-ratoon rice (SR-RR). The results showed that there were two distinct N2O emissions peaks in the SR-RR treatment in the main crop season, and the first appeared 13 days earlier than SR treatment, while the highest peak appeared in the ratoon season with a value of 1 630.7 μgN·m-2·h-1. The N2O emissions from the SR-RR treatment was 5.63 kgN·hm-2 during the full observation period, and the N2O emissions during the ratoon season was 2.35 kgN·hm-2, which accounted for approximately 42% of the total emissions in the two seasons. The total amount of N2O emitted from the SR-RR treatment in the two seasons was 246% higher than that of the SR treatment (P<0.05). The total rice yield of SR-RR in the two seasons was 10.4 t·hm-2, and the yield of the ratoon season was 1.89 t·hm-2, which accounted for 18% of the total rice yield in the two seasons. The grain yields in the two seasons were 22% (P<0.05) higher than that of the SR treatment. The N2O emissions per unit of yield from the SR-RR treatment was 0.54 kgN·t-1 grain, which was 184% higher than that of the SR treatment (P<0.05). These results provide supporting date and a scientific basis for further analysis on the N2O emissions rules of ratoon paddy fields covered with PM, as well as the search for effective emissions reduction measures. |
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