CAJ | 학술논문

采用静态箱-气相色谱法对2012年水稻(Oryza sativa)生长期内不同有机无机配施双季稻田CH4排放通量进行观测.结果表明:稻田CH4排放主要集中在持续淹水的苗期和分蘖期,该时段CH4排放量占全生育期排放总量的78%,说明田间水分是影响 CH4排放的重要因素.有机无机肥配施均不同程度增加稻田 CH4排放量,猪粪+化肥处理(猪粪处理)、猪粪堆肥+化肥处理(堆肥处理)和沼渣沼液+化肥处理(沼渣沼液处理)的全年累积排放量较纯化肥处理分别增加了207.3%(P<0.01)、67.4%和75.7%.新鲜猪粪直接施用可极显著地增加稻田CH4的排放,但猪粪堆肥与沼渣沼液处理和对照相比,并不显著增加稻田CH4排放量;从单位产量的GWP来看,猪粪堆肥处理的单位产量全球增温潜势(GWP)为0.49 kg·kg-1,明显低于猪粪处理,也低于沼渣沼液与无氮处理,与无肥处理几乎相同,是较好的施肥处理,可较好地协调经济效益与环境效益的关系.
채용정태상-기상색보법대2012년수도(Oryza sativa)생장기내불동유궤무궤배시쌍계도전CH4배방통량진행관측.결과표명:도전CH4배방주요집중재지속엄수적묘기화분얼기,해시단CH4배방량점전생육기배방총량적78%,설명전간수분시영향 CH4배방적중요인소.유궤무궤비배시균불동정도증가도전 CH4배방량,저분+화비처리(저분처리)、저분퇴비+화비처리(퇴비처리)화소사소액+화비처리(소사소액처리)적전년루적배방량교순화비처리분별증가료207.3%(P<0.01)、67.4%화75.7%.신선저분직접시용가겁현저지증가도전CH4적배방,단저분퇴비여소사소액처리화대조상비,병불현저증가도전CH4배방량;종단위산량적GWP래간,저분퇴비처리적단위산량전구증온잠세(GWP)위0.49 kg·kg-1,명현저우저분처리,야저우소사소액여무담처리,여무비처리궤호상동,시교호적시비처리,가교호지협조경제효익여배경효익적관계.
Methane emission fluxes from double-cropping paddy fields with different combined application of organic and inorganic fertilizers were measured by using the static chamber-gas chromatograph technique during rice growth period in 2012. Results showed that methane emitted principally at the seedling and tillering stages of rice in the durative water logging condition, accounting for 78%of the total methane discharge during the whole rice growth period. It indicated that field moisture content was an significant factor affecting methane emission. Treatments with combined application of organic and inorganic fertilizers could increase methane discharge to different degrees. Compared with chemical fertilizer treatment, annual methane emission of treatments with ZF(Pig manure and mineral fertilizer), DF(Pig manure composting and mineral fertilizer), ZYF(biogas slurry and mineral fertilizer) increased by 207.3%(P<0.01)、67.4%and 75.7%respectively. In contrast to CF(chemical fertilizer treatment), the fresh pig manure application could significantly increased methane emission in paddy fields, while the DF treatment and ZYF treatment were not remarkably increase methane emission.GWP(Global warming potential) of unit yield in DF treatment was 0.49 kg·kg-1, which was obviously lower than ZF, ZYF and non-nitrogen treatments and similar to non-fertilizer treatment, indicating that DF was an optimized fertilizer which could coordinate the relationship between economic benefit and environmental risk.