The Effects of different agricultural management measures on CH4 emission from paddy fields in southwest Shandong Province

Abstract

The field experiments were conducted on garlic stubble rice fields in southwestern Shandong Province. The experimental program was designed and the influence of different agricultural management measures on CH4 emission flux and the factors affecting CH4 emission were analyzed. The results show that although temperature affects CH4 emissions from paddy fields, it is not the only influencing factor. Compared with submerged irrigation+no basal fertilizer method, the CH4 emission flux of intermittent irrigation+basal fertilizer method is significantly larger; under the same submerged irrigation method, applying basal fertilizer is beneficial to CH4 emission. In the submerged irrigation+basal fertilizer mode, tillering fertilizer is more conducive to methane emission than panicle fertilizer. The use of intermittent irrigation method to apply appropriate amount of base fertilizer and tiller fertilizer can effectively control the increase of rice yield and the reduction of CH4 emissions in the rice field. The above operations can increase agricultural production and income and reduce greenhouse gas emissions.