EFFECT OF DATES OF SOWING AND CHEMICALS ON SEED YIELD AND QUALITY OF MALE PARENT SB (YF)-425 COTTON (Gossypium barbadense L.)
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Date
2001-08-04
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE
Abstract
A field experiment was conducted at Main Research Station,
University of Agricultural Sciences, Dharwad during kharif 1999-2000 to
find out the effect of dates of sowing and chemicals on seed yield and quality
of barbadense cotton cultivar SB(YF)-425. The experiment consists of two
dates of sowing (main plots) and nine treatments (sub plots) comprising of
two plant growth regulators and two micronutrients at different
concentrations and different combinations. The experiment was laid out in
split plot design with three replications.
The data indicate that the May sowing was found to be best to
produce higher yields and high quality seeds as compared to June sowing.
Plant height and number of leaves increased significantly due to foliar
application of ZnS04 (0.1%) and boron (0.1%) in combination with GA3
(50 ppm). The application of growth regulators and nutrients significantly
increased the number of squares, flowers and matured bolls per plant except
acetyl salicylic acid which resulted in significantly higher values for these
parameters.
The yield and yield components were significantly influenced
due to growth regulators and nutrients. Among the treatments, the highest
yield and yield components were recorded in RDF + foliar spray of ZnS04
(0.1%) + Boron (0.1%) in combination with GA.i (50 ppm) followed by ZnS04
(10 kg/ha) + Boron (5 kg/ha) + GA,3 (50 ppm).
The seed quality parameters were significantly improved by the
use of growth regulators and nutrients. Significantly higher germination,
shoot length, root length and vigour index were observed in plants sprayed
with ZnS04 (0.1%) + Boron (0.1%) + GA3 (50 ppm).
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