HEAT USE, HELIO -THERMAL USE AND RADIATION USE EFFIENCY OF BT COTTON UNDER RAINFED CONDITIOND OF ANDRAPRADESH

Publication Date : 22/02/2016


Author(s) :

M. RATNAM , S.RAJAMANI.


Volume/Issue :
Volume 2
,
Issue 2
(02 - 2016)



Abstract :

A field experiment was carried out during kharif, 2010-2011 and 2011-2012 on clay soils of Regional Agricultural Research Station, Lam, Guntur. The experiment consists of six dates of sowing windows viz., 2 FN of July, 1 FN of Aug, 2FN of Aug, 1 FN of Sept, 2 FN of Sept and 1 FN of Oct to know the heat use efficiency, heliothermal use efficiency and radiation use efficiency of Bt. cotton (NCS-145) in Krishna agro climatic zone of Andhra Pradesh. The results indicated that the Bt. cotton sown on 2nd FN of July has received maximum heat use efficiency, heliothermal use efficiency and radiation use efficiency (131.55 MJm-2) and consequently resulted in to maximum seed cotton yield (2510 kgha-1) followed by crop sown on 1st FN of August with a yield of 1820 kgha-1. Statically significant correlation was found between radiation use efficiency and seed cotton yield of Bt. cotton under rainfed conditions of Andhra Pradesh.


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