Impact of gypsum application on the methane emission from a wetland rice field.
Impact of gypsum application on the methane emission from a wetland rice field.
复制标题
施用石膏对湿地稻田甲烷排放的影响。
DOI：
10.1029/94gb00386
复制
发表时间：
1994
影响因子：
5.2
通讯作者：
H. Neue
中科院分区：
文献类型：
--
作者：
H. Gon;H. Neue
在1991年和1992年的雨季，菲律宾稻田甲烷排放量进行了监测与封闭室技术。与未修正的地块相比，使用6.66吨/公顷石膏修正的地块的甲烷排放量减少了55-70%。虽然从高输入新鲜有机质的领域的CH 4排放强烈增强，实验表明，相对减少CH 4排放石膏应用是独立的有机质添加。减少甲烷排放量石膏应用是最有可能的是由于抑制甲烷的硫酸盐还原菌。在石膏改良地块的土壤溶液中观察到的SO 42 −浓度远高于文献报道的硫酸盐还原菌与产甲烷菌成功竞争的最低浓度。这些数据为减少高硫酸盐土壤或石膏改良土壤上种植的水稻的甲烷排放量提供了基础。
Methane emission from Philippine rice paddies was monitored with a closed chamber technique during the 1991 and 1992 wet season. The methane emission from plots amended with 6.66 tons.ha−1 gypsum was reduced by 55–70% compared to non-amended plots. Although CH4 emission from fields with a high input of fresh organic matter was strongly enhanced, the experiments showed that the relative reduction in CH4 emission upon gypsum application was independent of organic matter addition. The reduced CH4 emission upon gypsum application was most likely due to inhibition of methanogenesis by sulfate-reducing bacteria. Observed SO42− concentrations in the soil solution of gypsum-amended plots were well above minimum concentrations reported in the literature for successful competition of sulfate-reducing bacteria with methanogens. The data provide a base for reducing the estimates of CH4 emissions from rice grown on high-sulfate containing soils or gypsum-amended soils.