摘要
在大田条件下,应用甲烷自动测试系统在水稻生育期内持续测定3个水稻品种的甲烷排放通量。试验结果表明:水稻品种对稻田甲烷排放通量有明显的影响,品种间差异高达2.26倍;根量大的水稻品种,甲烷排放通量高,稻田气泡排放甲烷强度大,土壤水溶液中水溶甲烷浓度也高。试验证明,水稻根系的大小是导致水稻品种间甲烷排放通量差异的主要原因。
Methane emission rates as affected by rice cultivars were measured during the rice season under field condition, using an automatic sampling-measuring system. The experiment results showed that methane emission rates differed greatly among the three rice cultivars studied. The cultivars with larger root biomass not only gave higher methane emission rate, and also gave higher ebullition of methane and higher dissolved methane concentration. Data indicate that difference in methane emission rates among rice cultivars was determined by the difference in root biomass among them.
出处
《作物学报》
CAS
CSCD
北大核心
1999年第4期441-446,共6页
Acta Agronomica Sinica
基金
UNDP和IRRI资助项目(UNDP-IGEF GLO/91/G31)
关键词
水稻
品种
甲排放通量
稻田
Rice cultivars
Methane emission rate
Ebullition of methane
Dissolved methane concentration
Root biomass
