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Journal of Pharmacognosy and Phytochemistry

Journal of Pharmacognosy and Phytochemistry

Vol. 8, Special Issue 2 (2019)

Drip irrigated paddy: An adaptation strategy to mitigate the climate change

Author(s):

Ramesh T, Rathika S, Ravi V, Sabarinathan R and Eli Vered

Abstract:
A field experiment was conducted at Tamil Nadu Rice Research Institute, Aduthurai to quantify the greenhouse gases (CH4, CO<sub>2</sub> and N<sub>2</sub>O gas flux) emission in drip irrigated paddy in comparison with conventional flooded paddy. Gas flux was collected during critical stages of rice by static chambers installed in the field. Gas chromatography Varian 450 equipped with three different detectors was used for gas analysis. Results on greenhouse gases (GHG) emission revealed that drip irrigated paddy emitted lesser methane as compared to transplanted paddy in all stages of sampling. In tillering stage, both Hybrid CORH 3 and variety ADT 45 under drip irrigated system emitted lesser quantum of CH<sub>4</sub> as compared to transplanted paddy (9.31 mg/m<sup>2</sup>/day). Comparing two cultivars under drip system, variety ADT 45 emitted more CH<sub>4 </sub>(6.37 mg/m<sup>2</sup>/day) than Hybrid CORH3 (3.97 mg/m<sup>2</sup>/day). In case of CO<sub>2</sub>, drip irrigated paddy emitted higher CO<sub>2</sub> during tillering stage (CORH3-4107.1 mg/m<sup>2</sup>/day and ADT45-5184.2 mg/m<sup>2</sup>/day) over conventional paddy (1061.4 mg/m<sup>2</sup>/day). Variety ADT 45 emitted more CO<sub>2</sub> in all stages than Hybrid CORH3 under drip irrigated system. The quantification of N<sub>2</sub>O emission revealed that there was not much variation during early stages of crop growth in both drip and conventional system of planting. However, flooded paddy emitted higher NO<sub>2 </sub>in both flowering (2.3 mg/m<sup>2</sup>/day) and maturity stages (2.9 mg/m<sup>2</sup>/day) over drip irrigated paddy (0.5 mg/m<sup>2</sup>/day in both stages). In general, CH<sub>4</sub> and CO<sub>2</sub> emission were higher during tillering stage with steady decline in later stages in drip irrigated paddy. In flooded paddy, lesser CO<sub>2</sub> emission during tillering stage and reached maximum at flowering stage, then decline towards maturity. Growing paddy under drip irrigation saved 31.8% water in ADT 45 variety and 28.2% in hybrid CORH 3 as compared to transplanted paddy. Hybrid CORH 3 registered 45.4% higher yield over ADT 45 under drip irrigation and 7.0% lesser yield than ADT 43 variety grown as conventional transplanted paddy.

Pages: 190-193  |  1212 Views  241 Downloads

How to cite this article:
Ramesh T, Rathika S, Ravi V, Sabarinathan R and Eli Vered. Drip irrigated paddy: An adaptation strategy to mitigate the climate change. J Pharmacogn Phytochem 2019;8(2S):190-193.

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