摘要
通过网室小区试验，观测得到单施尿素处理的甲烷排放通量为０．６４ｍｇ／ｍ￣２·ｈ；农家肥＋尿素处理、农家肥＋硝铵处理、农家肥＋硫铵处理的甲烷排放通量分别为５７．１，４２．１，３０．７１ｍｇ／ｍ￣２·ｈ；农家肥＋硫铵＋间歇灌溉处理和农家肥十尿素＋间歇灌溉处理的甲烷排放通量分别为２２．０和１４，７ｍｇ／ｍ￣２·ｈ。结果表明，以农家肥为基肥的５个处理的甲烷排放通量大大高于单施尿素处理的甲烷排放通量，表明高量有机肥是影响甲烷排放通量的首要因素。对于甲烷排放通量，追施硫铵、硝铵处理比追施尿素处理分别减少４６．２％和２６．３％；间歇灌溉处理比淹灌处理减少２８．３－７４．３％。表明追施硫铵、硝铵，间歇灌溉可明显降低甲烷排放通量。
Abstract Some conclusions were determined through plot experiments:the MEF,when the paddy soil was applied only with urea,was 0.62mg/m￣2·h;theMEFs.when sepsrately treated With manures + urea, manures + ammo-and manures + ammonium sulphate,were 57. 1,42.1,and30.7mg/m￣2 h; the MEFs, when separately treated with manures + ammo-nium sulphate + intermittent irrigation,and manures + urea + intermittentirrigation, were 22.0 and 14.7mg/m￣2·h. The MEFs of five treatments ofusing manures as a base fertilizer much higher than that of treatment ofurea,The results showed that manures was the first factor which affectedthe MEFs. The MEFs of treatments with ammonium sulpbate,ammoniumnitrate were 46.2% and 26.2%,less than that of treatment with urea. TheMEF of treatment with intermittent irrigation was 28.3-71.1% less thanthat of treatment basin irrigation. So,the treatments with ammoniumsulpbate,ammonium nitrate and intermittent irrigation could obviouslyreduce the MEF.
出处
《农业环境保护》
CSCD
1995年第3期101-104,共4页
Agro-Environmental Protection
