摘要
１９９４年在中国科学院封丘生态试验站通过小区试验研究了土壤质地和水分状况对稻田 Ｎ２Ｏ排放的影响。结果表明稻田 Ｎ２Ｏ排放主要受土壤水分状况的影响，淹水状态下，Ｎ２Ｏ排放很少，水分落干期间 Ｎ２Ｏ排放量占水稻生长期 Ｎ２Ｏ排放总量的 ８７．５０％～９８·６５％。土壤质地显著影响稻田平均Ｎ２Ｏ排放通量，砂质土壤排放的Ｎ２Ｏ显著或极显著高于壤质和粘质土壤，水稻生长期砂质、壤质及粘质土壤的平均Ｎ２Ｏ排放通量分别为 １３７．６３、８７．５４和６３．４６μｇＮ２Ｏ－Ｎ／ ｍ２· ｈ。
Plot experiment was carried out to study the effect of soil water regime and soil texture on N2O emission from rice paddy field in Fengqiu ecological experimental station, Chinese Academy of Sciences in 1994. The results showed that N2O emission was mainly affected by soil water regime. N2O emission was very low when the soil was flooded, while N2O emission during soil drying period accounted for as high as 87.50%~ 98.65% of the total seasonal N2O emission. Soil texture significantly influenced N2O emission from rice paddy field. N2O emission from sandy soil was significantly higher than that from loam and clay soils. Seasonal mean N2O fluxes from sandy, loam and clay soils were 137.63. 87.54 and 63.46μg N2O-N. m-2. h-1, respectively.
出处
《土壤学报》
CAS
CSCD
北大核心
2000年第4期499-505,共7页
Acta Pedologica Sinica
基金
国家自然科学基金会资助!(批准号49371039)
