Effect of plant growth regulators on ripening, grain development, and rice quality
1989
Awan, I. | Alizai, H.K. | Chaudhury, F.M. (Agriculture Univ., Faisalabad (Pakistan). Agronomy Dept.)
The effect of plant growth regulators was studied in a pot experiment laid out in a completely randomized block design with four replications. IR6 seedlings were transplanted at 30 d after seeding, 3 seedlings/240-mm-diameter, 300-mm-deep pot. An aqueous solution of 100 ppm gibberellic acid (GA3) and 100 ppm indoleacetic acid (IAA) were sprayed at 3 ml/plant at panicle initiation. Application of growth regulators at panicle initiation significantly affected plant height, tillers/plant, grains/panicle, 1,000-grain weight, sterility, abortive kernels, grain yield, and protein content. Higher, better quality yield with GA3 and IAA may be the result of more efficient, vigorous leaves and other plant parts for a longer period because of delayed senescence in treated plants.
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