Methane fluxes from rice fields in China: Spatial and temporal variability and estimates of contributions to the global budget. Progress report.

摘要

During the last year we have made considerable progress on determining the emission rate of methane from rice fields in China and the factors that control the emissions. We have completed work on the methane emissions from rice fields for a period of four years at Tu Zu near Chengdu in Szechuan province in China. The available data is being entered into the computer. Flux calculations will be available within 2 months. The fluxes of methane from the rice fields and ambient methane concentrations near the fields are provided including temperature cloud cover, wind speeds, water level, planing density, fertilizer application, pests, diseases, growth rate, rice type, soil type, microbial ecology, root exchange exudates, and pH for the 4-year period. The analysis of the data show that there are a number of internal and external variables that affect the emissions of methane from rice fields.