RESPONSE OF RICE CROP UNDER ELEVATED CARBON DIOXIDE CONCENTRATION WITH AZOLLA TREATMENT
Journal Title: International Journal of Agricultural Science and Research (IJASR) - Year 2017, Vol 7, Issue 2
Abstract
Azolla is known for efficiently sequestering CO2 without the requirement of soil based nitrogen source. This makes azolla an important green manuring crop in rice based farming systems. Extensive studies have established that elevated CO2 profoundly effects growth and development, physiology and productivity in rice plant. This study was conducted to determine the effect of elevated CO2 on rice supplemented by azolla as nitrogen source. Rice was grown under different CO2 concentrations and azolla treatments in environment controlled chambers (ECC) during June to November 2016. Rice plants responded mostly positively to elevated CO2. Plant Dry weight was found to increase except at 700 ppm. Likewise other parameters responded in the same manner. Azolla treated plants were higher in terms of dry weight against those without the ferns. Panicle length was found to be higher in higher CO2 environment. Same was found in case of test weight as in general, growth and yield of rice tent to increase with elevated atmospheric CO2 concentration. Heading time was shortened but maturity extended with elevated CO2 irrespective of azolla treatment. From these result we conclude that these effects of elevated CO2 to some extent is positively affected by incorporating rice with azolla.
Authors and Affiliations
SONBEER CHACK
Keywords
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