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Pakistan Journal of Biological Sciences
Year: 2004 | Volume: 7 | Issue: 11 | Page No.: 1898 - 1902
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Response of New Cotton Variety MNH-700 to Mepiquat Chloride under Varying Plant Population
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Muhammad Iqbal,
M. Zaffar Iqbal,
Rao Sohail A. Khan,
Khezir Hayat
and
M. A. Chang
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Abstract: Mepiquat chloride (1, 1-dimethyl-piperidinium chloride) as a plant growth regulator
that can used by producer to manage the crop development, uniformity and maturity.
Field experiments conducted during 2002 and 2003 to evaluate the fact of row spacing
and Mepiquat chloride application on cotton (Gossypium hirsutum
L.) var. MNH-700. Four rates of Mepiquat chloride (4x123, 2x246, 4x246 and 4x370
mL ha-1) and a check with 0 mL ha-1 were evaluated for cotton
growing in 25, 50 and 75 cm row spacing in 2002 and 2003. Plant height and number
of total main stem nodes were different among row spacing and Mepiquat chloride
application. The height was highest in plots where no application of Mepiquat
chloride. Cotton grown in narrow row spacing (20 and 50 cm) had higher seed cotton
yield than 75 cm row spacing, but reduce Ginning Out Turn (GOT) percentage in
narrow row spacing negating any increase in seed cotton yield. In general reduced
row spacing and Mepiquat chloride application did not lower fiber quality. In
some cases, micronair was reduced in narrow row spacing (0.1), but values were
in acceptable range for fiber traits. Mepiquat chloride is considered a desirable
management tool to control crop growth. Ultra-narrow row spacing should practices
only in the areas where plant growth is not accurate or upto the standard. In
fertile soils, Mepiquat application is suggested for control of plant growth in
efficient way under narrow row spacing in viewing the habit of cotton genotype. |
Cited References | Fulltext
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