微生物生物量C、土壤呼吸的季节性变化与黑土稻田甲烷排放  

Seasonal variations of soil microbial biomass,respiration rate and CH_4 emission in black earth rice fields

作　　者：梁巍[1] 岳进[1] 吴劼[1] 史奕[1] 黄国宏[1] 梁战备[1] 

机构地区：[1]中国科学院沈阳应用生态研究所陆地生态过程重点实验室,沈阳110016

出　　处：《应用生态学报》2003年第12期2278-2280,共3页Chinese Journal of Applied Ecology

基　　金：国家重点基础研究发展规划资助项目 (G19990 1180 5 )

摘　　要：对黑土水稻田一个生长季中土壤微生物生物量C、土壤呼吸和甲烷排放通量进行了监测 .结果表明 ,在水稻生长初期 ,长效尿素能显著抑制微生物生物量C和土壤呼吸 (P <0 .0 5 ) .间歇灌溉措施对二者几乎没有影响 .间歇灌溉能减少稻田甲烷的排放 ,平均排放量比对照减少了 32 .5 % .长效尿素的施用稻田使甲烷的排放略有增加 .施用长效尿素的处理 。The measurements of soil microbial biomass C,respiration rate and CH 4 emissions during one rice growth period in black earth rice fields showed that the soil microbial biomass C and respiration rate were depressed significantly by the application of slow releasing urea at the early stage of rice growth period (P<0.05),but almost not affected by intermittent irrigation.The CH 4 emission was decreased by 32.5% in the intermittent irrigation treatments,but not significantly affected by the application of slow releasing urea,compared to the control.It was significantly related to soil microbial biomass C in slow releasing urea treatments.

关 键 词：黑土 CH4排放 微生物生物量C 土壤呼吸 

分 类 号：S152.6[农业科学—土壤学]