Mitigating Methane Emission from the Rice Ecosystem through Organic Amendments

Kandasamy Senthilraja, Subramanian Venkatesan (), Dhandayuthapani Udhaya Nandhini (), Manickam Dhasarathan, Balasubramaniam Prabha, Kovilpillai Boomiraj, Shanmugam Mohan Kumar, Kulanthaivel Bhuvaneswari, Muthurajan Raveendran and Vellingiri Geethalakshmi ()
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Kandasamy Senthilraja: Directorate of Crop Management, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu, India
Subramanian Venkatesan: Directorate of Research, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu, India
Dhandayuthapani Udhaya Nandhini: Centre of Excellence in Sustaining Soil Health, Anbil Dharmalingam Agricultural College & Research Institute, Trichy 620027, Tamil Nadu, India
Manickam Dhasarathan: Agro-Climatic Research Centre, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu, India
Balasubramaniam Prabha: Department of Renewable Energy Engineering, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu, India
Kovilpillai Boomiraj: Agro-Climatic Research Centre, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu, India
Shanmugam Mohan Kumar: Agro-Climatic Research Centre, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu, India
Kulanthaivel Bhuvaneswari: Agro-Climatic Research Centre, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu, India
Muthurajan Raveendran: Directorate of Research, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu, India
Vellingiri Geethalakshmi: Agro-Climatic Research Centre, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu, India

Agriculture, 2023, vol. 13, issue 5, 1-17

Abstract: Tamil Nadu in particular is a key rice-producing region in peninsular India. Hydrochemistry, viz., redox potential (Rh), soil temperature and dissolved oxygen (DO), of rice soils can determine the production of greenhouse gas methane (CH 4 ). In recent decades, the cultivation of crops organically became a viable option for mitigating climate change. Hence, this study aimed to investigate the effects of different organic amendments on CH 4 emission, Rh, DO, and soil and water temperature (T) in relation to the yield of paddy. The treatments composed of viz., control, blue-green algae (BGA), Azolla , farm yard manure (FYM), green leaf manure (GLM), blue-green algae + Azolla , FYM + GLM, BGA + Azolla + FYM + GLM, vermicompost and decomposed livestock manure. With the addition of BGA + Azolla , the highest reduction in CH 4 emission was 37.9% over the control followed by BGA. However, the same treatment had a 50% and 43% increase in Rh and DO, respectively, over the control. Established Pearson correlation analyses showed that the CH 4 emission had a positive correlation with soil (r = 0.880 **) and water T (r = 0.888 **) and negative correlations with Rh (r = −0.987 **) and DO (r = −0.963 **). The higher grain yield of 26.5% was associated with BGA + Azolla + FYM + GLM application. Our findings showed that there are significant differences in CH 4 emissions between different organic amendments and that hydro-parameters may be a more important controlling factor for methane emissions than temperature. The conclusion has been drawn based on valid research findings that bio-fertilization using BGA and Azolla is an efficient and feasible approach to combat climate change, as it assists in reducing methane emissions while simultaneously boosting crop yield by fixing nitrogen into the soil in the studied agro-climatic zone.

Keywords: methane emission; organic amendments; soil and water temperature; redox potential; dissolved oxygen; climate mitigation strategy (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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