摘要
通过温室盆栽试验，研究了不同冬作处理时后茬水稻生长期甲烷排放通量及土壤温度、土壤Ｅｈ的日变化规律。结果表明：连续晴天甲烷排放通量和土壤温度存在明显的昼夜变化，最大值出现在下午４时左右，最小值出现在凌晨４时左右，符合余弦函数变化规律；连续阴雨天甲烷排放通量有逐日降低的趋势，但其昼夜变化缺乏规律性。种稻盆钵土壤甲烷排放通量昼夜变化主要受０～１０ｃｍ深土壤温度的影响，而与土壤氧化还原电位无关。
A pot
culture experiment of rice in greenhouse was carried out to investigate the diurnal variations of
CH 4 fluxes,soil temperatures and soil Eh during rice growing period with different treatments
applied in the former winter cropping season.The results showed that there existed obvious
diurnal variations of CH 4 fluxes and soil temperatures in continuous fine days.The maximum
fluxes occurred at 4 pm while the minimum fluxes at about 4 am,and the variation patterns of
CH 4 fluxes and soil temperatures were in conformity with cosine function of time t as a
variable.Methane fluxes in continuous overcast and rainy days had a decreasing tendency day
by day,and its diurnal variations could not be fitted with a cosine functional curve of time t
.Diurnal variations of CH 4 fluxes were mainly influenced by soil temperature at 0 10 cm soil
depth.And there is no influence of soil Eh on diurnal variations of CH 4 fluxes.
出处
《农村生态环境》
CSCD
1999年第1期10-13,36,共5页
Rural Eco-Environment
基金
国家自然科学基金
