摘要
采用自动连续测量系统，对不同施肥情况下稻田甲烷排放通量进行了监测。结果表明：施肥是影响稻田甲烷排放的重要因素。增施有机肥会导致甲烷排放量增加．应用化肥可降低甲烷排放，有机肥加倍处理，３２ｄ甲烷总排放量１６．４０ｇＣＨ＿４／ｍ￣２，是化肥加倍处理的１．５６倍；常规施肥处理介于两者之间。略高于常规加倍处理。肥料种类对甲烷排放量也有影响。全施有机肥高于有机肥加化肥（１：１）组，施沼渣肥组次之，全化肥组排放量最低，不到全有机肥处理排放量的１／５．有机肥又以施人畜粪的甲烷排放率最高，绿肥次之，沼渣肥和稻草的甲烷排放率最低。有机肥的多级利用是减少稻田甲烷排放的一条重要途径。
CH_4 emission from rice fields in the case of ap-plying different fertilizers has been detected,using automatic continuous measutement system. The result shows:fertilizer application is an important factor that affects methane emis-sion from paddy fields. An increase in organic manure applied Ieads to an increase in methane emission and chemical fertilizer to a decreases,When the amount of organic manure is dou-bled,the amount of CH_4 emission will be:16 40 g CH4/m￣2 in 32d.that is 1,56 times the amount of chemital fertilizer dou-bled.Normal amount applied is between the two and slightly higher than the amount doubled.Different fertilizers applied give different methane emissions from paddy fields. Methane emission from fully organic manured field is higher than that from organic plus chemical(1:1) manured field, next is that for biogas residue manured and the lowest is that for fully chemical fertilizer which is 1/5 less than that of the fully or-ganic manure. Among the organic manured fields,the field that receivers human and animal excrements gives the highest methane emission, the green manured field takes the second place and the biogas residue and rice straw manured fields givelowest methane emission. And therefore,the multistage uti-lization of organic manure is a way to decrease methane emis-sion from paddy fields.
出处
《农村生态环境》
CSCD
1995年第1期10-14,共5页
Rural Eco-Environment
关键词
肥料
稻田
甲烷
自动监测
fertilizer,paddy field, methane,automaticdetecting
