Indian Journal of Plant Physiology

  • Year: 2010
  • Volume: 15
  • Issue: 1

Comparative Performance of a Rainfed Cotton Varietyand Hybrid Under Late Sown Condition

  • Author:
  • K.B. Hebbar, M.V. Venugopalan, M. Dawale, M.R.K. Rao
  • Total Page Count: 4
  • DOI:
  • Page Number: 61 to 64

Central Institute for Cotton Research, P.B. No. 2, Shankarnagar, Nagpur, India.

*Corresponding author, E-mail: kb_hebbar@rediffmail.com.

Present address: Indian Institute of Soil Science, Bhopal, M.P.

Abstract

The growth and physiological performance of a normal and late sown cotton variety (LRA 5166) and a hybrid (NHH44) was tested during 2003–04 and 2004–05 cropping seasons under rain-fed condition. Normal planting (D1) was done with the commencement of rain while, late sowing (D2) was done 15 days after D1. Phenological development of the variety and the hybrid was similar up to flowering however, the hybrid had an extended reproductive period compared to variety both in D1 and D2. Hybrids also accumulated more biomass and had higher LAI at reproductive phase and showed a strong correlation with photosynthesis rate (PN). This higher PN in addition to longer duration of reproductive stage enabled hybrids to produce far more number of squares and bolls compared to the variety in D2.

Keywords

Cotton, growth, hybrid, late sown, photosynthesis, variety, yield