有机肥和无机肥对水稻土产甲烷的影响

EFFECTS OF ORGANIC AND INORGANIC FERTILIZERS APPLICATION ON METHANOGENIC ACTIVITY

在盆栽条件下，研究了二种有机肥和五种无机肥对淹水稻上产甲烷细菌数量和甲烷释放量的影响。结果表明有机肥对产甲烷菌数量和甲烷释放量均有较大的促进作用，其中以绿肥最为显著。无机肥料的施用处理中，NH4HCO3、（NH4）2SO4、CO（NH2）2和NH4Cl对水稻土产甲烷细菌数量的增加和甲烷释放量均略有促进作用，而施NaNO3处理的对甲烷释放总量有较明显的抑制作用。

The effects of two organic fertilizers and five chemical fertilizers on the amount of methane producing bacteria (MPB) and amount of methane release under the condition of pot culture were studied. With improved hungate anaerobic technique. the amount of hydrolytic fermentative bacteria(HFB), hydrogen-producing acetogenic bacteria(HPAB), Methanogenic bacteria (MB) in the submerged paddy soil planting rice crop were determined by the MPN(the most prbbable number)method.The amount of methane released were collected in situ field method, and the amount of methane were determined at once with chromatography. The results obtained showed that the application of organic fertilizers accelerated the amount of MPB and methane released. The effects of green manure were the most significant. Ammonium dicarbonate, ammonium sulfate, urea and ammonium chloride could slightly accelerate the amount of MPB and methane released while sodium nitrate inhibited them.