Vol. 3 (2) : March-April 2012 issue
Green Farming Vol. 3 (2) : 142-146 (March-April, 2012)
Occurrence of drought severities during different growth stages and their impact on growth, development and yield in Bt cotton
S.L. PATIL1, B.C. PATIL2* and A.G. BABU3
Department of Crop Physiology, Agricultural Research Station-Dharwad, University of Agricultural Sciences, College of Agriculture, Dharwad - 580 007 (Karnataka)
Designation : 1Scientist, 2Principle Scientist (Cotton) & Head *(bc_patil@yahoo.com), 3Ph.D. Scholar
Subject : Plant Physiology, Crop Physiology and Bio-Chemistry
Paper No. :
Total Pages : 5
Received : 05 January 2012
Revised accepted : 20 March 2012
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Citation :
S.L. PATIL, B.C. PATIL and A.G. BABU. 2012. Occurrence of drought severities during different growth stages and their impact on growth, development and yield in Bt cotton. Green Farming Vol. 3 (2) : 142-146 ; March-April, 2012
ABSTRACT
Cotton (Gossypium hirsutum) is the leading fibre crop of the world. Majority of the cotton grown in India comes from rainfed condition. As a result there will be water deficiency stress at one or the other growth stages. A field experiment was conducted at Agricultural Research Station, Dharwad, Karnataka during 2011-12 to study the occurrence of drought severities during different crop growth stages and its impact on growth, development and yield in Bt cotton hybrids. The experiment consists of four moisture levels viz., irrigated, two irrigations, one irrigation and rainfed as main plots, two genotypes viz., RCH-2 Bt BGII and MRC-6322 Bt BG-II as subplots in a split plot design with three replications on medium black soil in field condition. The results revealed that the genotype RCH-2 Bt BG-II recorded maximum plant height, TDM, LAI, rate of photosynthesis, transpiration, less water potential, more CSI, higher number of bolls as compared to MRC-6322 Bt BG-II under irrigated regime as compared to rainfed condition. Among the treatments, RCH-2 Bt in fully irrigated condition recorded significantly more seed cotton yield compared to MRC-6322 Bt in rainfed condition.
Key words :
Bt cotton, CSI, Gossypium hirsutum, moisture levels, phenology, water potential, yield attributes.
