Methane emission from paddy fields influenced by fertilization and dual cropping with azolla

Department of Microbiology, Annamalai University, Annamalainagar, Tamilnadu, India

Paddy fields are thought to be major greenhouse gases emitters. Several studies have investigated the reduction of greenhouse gases emission from paddy fields by applying AWD irrigation (alternative wetting and drying), a used method of water management practice and dual cropping method during rice growing seasons. This study was carried out to investigate the influence of fertilization and dual cropping of Azolla with rice cultivation on methane emissions and environmental variables in flooded paddy fields. The paddy fields are located in confluence point ofVellar and Manimuktha river basin in Peruvarappur village, Tamilnadu, India. The results showed that the organic fertilization increased the methane emission, increase in Total carbon (TC) level and decrease in pH of bulk soil of OFPF treatment. The dual cropping of Azolla with rice significantly degreased the methane emission, likely decreasing redox potential (Eh) in root region of rice in CFPF+Azolla treatment.

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