IMHE OpenIR  > 山地表生过程与生态调控重点实验室
川中丘陵地区冬水田甲烷排放特征研究
Alternative TitleCharacteristics of methane emission from winter flooded paddy field in the hilly area of central Sichuan Province
贺冬冬1; 周维1; 陈霖1; 任晓静1; 莫永亮1; 朱波2; 胡荣桂1
Corresponding Author胡荣桂
2017
Source Publication环境科学学报
ISSN0253-2468
Volume37Issue:6Pages:2281-2287
Other Abstract

以川中丘陵地区典型冬水田为对象,设置了有水稻常规施肥(RF)、无水稻常规施肥(NP)、有水稻无氮肥(NN)3种处理,以静态暗箱-气相色谱法对甲烷(CH_4)排放进行了原位观测.结果表明,RF、NP和NN处理下CH_4排放通量分别为-0.0042~ 18.29、0.03~ 16.78和0.10~ 26.76 mg·m~(-2)·h~(-1),平均排放通量分别为10.22、4.25和14.15 mg·m~(-2)·h~(-1)(以每平方米每小时消耗/产生的C量(mg)计),水稻生长季是主要排放期,但休闲季CH_4排放量仍占全年CH_4总排放量的14%.没有水稻处理的CH_4排放量显著低于有水稻处理(p<0.01);而不施氮肥处理的CH_4排放量显著高于施肥处理(p<0.01).CH_4排放通量与5 cm深土壤温度呈显著正相关(p<0.01),随着温度的升高,甲烷排放量呈指数增加.CH_4排放通量与1~ 4 cm的稻田水深呈显著负相关(p<0.01),随着水深的增加,甲烷的排放呈指数迅速下降;而与4~ 8 cm的稻田水深无相关性,甲烷的排放也变化缓慢.由此表明,土壤温度和水深在很大程度上调控着CH_4的排放.此外,研究结果也显示将冬水田休闲期改为旱作可减少CH_4排放,对环境有利.

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This study was conducted to investigate CH_4 fluxes and associated environmental factors from a typical winter paddy field in the hilly region of central Sichuan Province. Three treatments were set,i.e. rice-flooded fallow rotation (RF),no plant (NP)and no nitrogen fertilizer (NN). CH_4 fluxes were analyzed by the static opaque chamber and gas chromatography techniques. The results showed that CH_4 fluxes from treatments of RF,NP and NN varied from -0.0042~ 18.29,0.03~ 16.78 and 0.10~ 26.76 mg·m~(-2)·h~(-1),with average fluxes of 10.22,4.25 and 14.15 mg·m~(-2)·h~(-1),respectively. The emissions of CH_4 mainly occurred in a paddy soil during rice-growing season. However,emissions of CH_4 in non-cropping season accounted for 14% of the total annual emissions,which could not be ignored. CH_4 emission after treatment of RF was significantly higher than that of NP but lower than that of NN (p<0.01). CH_4 emissions were positively correlated with soil temperature at the 5 cm depth (p<0.01)due to the exponential increase of the amount of methane emissions with temperature. CH_4 fluxes were negatively related to water depth in 1 ~ 4 cm of paddy fields (p<0.01),which suggested that soil temperature and water depth significantly influenced the fluxes of CH_4 . The study also indicated that wheat cultivation in paddy soils during non-cropping season might be an effective way to reduce the release of CH_4,which facilitated decreasing the emission of greenhouse gasses.

Keyword冬水田 甲烷 影响因子 相关性
Subject AreaX53
DOI10.13671/j.hjkxxb.2016.0408
Indexed ByCSCD ; 北大中文核心
Language中文
CSCD IDCSCD:5998746
Funding Organization国家重点基础研究发展计划(No.2012CB417106) ; 中央高校基本科研业务费专项基金(No.2662016PY098)
Citation statistics
Cited Times:1[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/19021
Collection山地表生过程与生态调控重点实验室
Affiliation1.华中农业大学资源与环境学院
2.中国科学院成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
贺冬冬,周维,陈霖,等. 川中丘陵地区冬水田甲烷排放特征研究[J]. 环境科学学报,2017,37(6):2281-2287.
APA 贺冬冬.,周维.,陈霖.,任晓静.,莫永亮.,...&胡荣桂.(2017).川中丘陵地区冬水田甲烷排放特征研究.环境科学学报,37(6),2281-2287.
MLA 贺冬冬,et al."川中丘陵地区冬水田甲烷排放特征研究".环境科学学报 37.6(2017):2281-2287.
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