Effect of Growth Regulator and Ultra-Narrow Row (Unr) Spacing on Growth, Yield and Yield Components of Cotton
Effect of Growth Regulator and Ultra-Narrow Row (Unr) Spacing on Growth, Yield and Yield Components of Cotton
Sikander Hiyat1, Nazim Hussain1, Muhammad Ishaq Asif Rehmani2*, Muhammad Nasir Abbas2, Smana Raza3, Javed Shabbir Dar4 and Tauqeer Ahmad Yasir5
ABSTRACT
Mepiquat chloride, widely used growth regulator in cotton fields to increase crop yield. The present study was performed to investigate the effects of growth regulator (mepiquat chloride) and row spacings on growth and yield attributes of cotton. The experiment was conducted on randomized complete block design (RCBD) with split plot arrangement. Three levels of row spacing (25 cm, 50 cm, and 75 cm) were arranged in main plots, whereas, mepiquat chloride treatments (control, MQC0), mepiquat chloride 0.61 liter ha-1). Vegetative (plant height, number of monopodial and sympodial branches, no. of nodes plant-1) and reproductive growth and yield (no. of flowers plant-1, no. of square plant-1, no. of open and un-open bolls plant-1, seed cotton yield and cotton seed yield) parameters were recorded. The results revealed that exogenous application of mepiquat chloride @ 0.61 L ha-1, significantly reduced plant height as compared to control treatment. However, it did not reduce all other yield attributes of cotton. Among the row spacing treatments, widely spaced cotton plants (RS3, 75 cm) without application of mepiquat chloride produced maximum seed cotton yield as compared to all other spacing levels. Ultra-narrow row spacing (RS1, 25 cm) Combination of narrow row spacing (RS2, 50 cm) and mepiquat chloride application slightly higher seed cotton yield. Ultra-narrow row spacing must carefully use to exploit in the cotton production system was appeared to be a viable alternative approach for successful cotton production.
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