CAJ | 학술논문

采用3种秸秆还田方式(对照、秸秆均匀混施和秸秆条带状覆盖)进行田间试验,观测稻田CH_4和N_2O的排放通量,以探讨秸秆条带状覆盖对稻田CH_4和N_2O排放的影响.结果表明:秸秆条带状覆盖的CH_4排放量是对照的2.7倍,二者的N_2O排放量无明显差异;秸秆条带状覆盖的稻田CH_4排放量较秸秆均匀混施减少32%,其N_2O排放量是后者的5.1倍;稻田排放CH_4和N_2O的全球增温潜势(GWP)为:秸秆均匀混施＞秸秆条带状覆盖＞对照,且差异显著;秸秆条带状覆盖的水稻产量分别较对照和秸秆均匀混施增加27%和17%.秸秆条带状覆盖是值得推荐的稻季秸秆还田方式.
채용3충갈간환전방식(대조、갈간균균혼시화갈간조대상복개)진행전간시험,관측도전CH_4화N_2O적배방통량,이탐토갈간조대상복개대도전CH_4화N_2O배방적영향.결과표명:갈간조대상복개적CH_4배방량시대조적2.7배,이자적N_2O배방량무명현차이;갈간조대상복개적도전CH_4배방량교갈간균균혼시감소32%,기N_2O배방량시후자적5.1배;도전배방CH_4화N_2O적전구증온잠세(GWP)위:갈간균균혼시＞갈간조대상복개＞대조,차차이현저;갈간조대상복개적수도산량분별교대조화갈간균균혼시증가27%화17%.갈간조대상복개시치득추천적도계갈간환전방식.
A field experiment was conducted in 2006 to monitor CH_4 and N_2O emissions from rice fields as affected by strip mulching of wheat straws. The experiment was designed to have three treatments, i.e. (ⅰ) no wheat straw applied (Treatment CK);(ⅱ) incorporating wheat straws evenly into the topsoil (Treatment WI);and (ⅲ) strip mulching of wheat straws over the field (Treatment WM). Results show that compared with Treatment CK, Treatment WM significantly increased CH_4 mission by 2.7-fold. No significant difference in N_2O emission was observed between Treatments CK and WM. Compare with Treatment WI, Treatment WM decreased CH_4 emission significantly by 32%, while enhancing N_2O emission by 5.1-folds. The GWP of CH_4 and N_2O emitted from rice field was greatest in Treatment WI, which was followed by Treatments WM and CK, and the differences between them reached significant level. Compared with Treatments CK and WI, Treatment WM increased rice grain yield by 27% and 17%, respectively. Based on these results, the best management of wheat straw prior to rice cultivation is mulching of strips of wheat straws over the field.