Comparative performance of a rainfed cotton variety and hybrid under late sown condition
2010
Hebbar, K.B. | Venugopalan, M.V. | Dawale, M. | Rao, M.R.K.
The growth and physiological performance of a normal and late sown cotton variety (LRA 5166) and a hybrid (NIllI44) 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 co~pared to variety both in D1 and D2.. Hybrids also accumula(ed more biomass and had higher LAI at reproductive phase and showed a strong correlation with photosynthesis rate (P N). This higher P N 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.
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