EFFECT OF PAPER MILL EFFLUENT ON CHLOROPHYLLS, LEAF AREA AND GRAIN NUMBER IN TRANSPLANTED RICE (ORYZA SATIVA L. VAR MASURI)S.K. Dutta and C.L. Biossya
Effect of effluents released from the Nagaon Paper Mill, Jagireoad Assam on chlorophylls, leaf area and grain number, was studied in rice (Oryza sativo L. var Masuri). Effluent affected areas and effluent free areas where rice plants were grown were selected and divided into five separate plots in each case. The chlorophyll contents and leaf areas were studied at three different stages of plant growth viz., seedling, flowering and mature stages. The grain number was counted at the mature stage only. It was found that chlorophyll content and leaf area could not be directly correlated in both affected and non-affected rice plants. It emerged further that under similar conditions leaf area and total number of grains produced were directly proportional to each other in both affected and non- affected plants when taken separately.
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