摘要
通过稻田生产性对比试验研究了4种沼渣(分别以猪粪、鸡粪、马粪和人粪尿为主要发酵原料)、尿素和堆肥施用对稻田甲烷排放量的影响。测得前3种沼渣处理的稻田甲烷平均排放通量(3.92～7.76mg/(m^2·h))显著低于施堆肥的稻田(10.16mg/(m^2·h)),说明这3种沼渣作稻田肥料有显著控制甲烷排放量的作用,而且水稻产量也是前者(542.7～459.3千克/亩)高于施化肥(448.0千克/亩)和堆肥(455.1千克/亩)的处理。马粪沼渣处理的稻田甲烷排放量(10.02mg/(m^2·h))不显著高于施化肥(8.81mg/(m^2·h))和不显著低于施堆肥的处理,表现为生长后期排放量较高。此外,观察到一季稻田甲烷排放最高峰值集中在分蘖盛期至拔节期之间,可选作控制稻田甲烷排放总量的关键时期。
Through a comparative experiment in productive rice paddies, the influences of 4 inds of bogikas pit sediments, a compost and urea used as fertilizers on CH_4 emission from paddies were studied. The average CH_4 emission fluxes from paddies amended with sediments from biogas pits of pig dung, chicken dropping and nightsoil as the main fermentative materials were determinated in the range of 3.92-7.76mg/m^2/hr, which were significantly less than that from the compost amended paddies (10.26mg/m^2/hr). It is well illustrated that these 3 kinds of sedlments can be used as paddy manures for CH_4 emission control. In addition, the rice outputs from the former paddies (542.7-459.3kg/mu)were significantly higher than that from the latter field (455.1kg/mu) and that from the urea treated field(448.0kg/mu). The average CH_4 flux from the field treated with horse dung biogas sediment (10.02mg/m^2/hr) was unsignificantly higher than that from the urea treated field(8.81mg/m^2/hr), but less than that from the compost treated one. It was also observed from this experiment that the highest peak emission of CH_4 from the single cropping rice paddies appeared concentratedly between the midtillering and the earing stages, which can be chosen as the critical period for its CH_4 emission control.
出处
《中国沼气》
北大核心
1993年第4期11-15,共5页
China Biogas
关键词
稻田
沼渣
甲烷
排放量
沼气
Rice paddies,Biogas pit sedimecnts,CH_4 emission
