International Journal of Environment and Climate Change

The impact of growing environment on yield and heat use efficiency of different varieties of brinjal crop were investigated during autumn-winter season of 2020 at Vegetable Science Research Farm of Chaudhary Charan Singh Haryana Agricultural University, Hisar. The experiment was conducted in Factorial Randomized Block Design with four dates of transplanting (5, 15, 25 July and August 4) and three varieties (Hisar Shymal, HLB-12 and BR-112) with three replications of each. Yield and yield attributes along with heat use efficiency under different growing environment have been worked out. The maximum fruit length, fruit weight and fruit diameter was obtained on D_{2 -} 15^th July, 2020 transplanted crop. The maximum fruit length among varieties was recorded in variety HLB-12 while maximum fruit weight, fruit diameter was recorded in Hisar Shyamal which was significantly higher than other two varieties. The maximum fruit yield/plant and yield/ha was recorded in D₂ - 15^th July, 2020 transplanted crop. If farmers are able to adjust their sowing dates accordingly they will get higher yield and maximum return of their resources used. Among the varieties, maximum yield/plant and yield/ha was recorded in variety Hisar Shyamal. The maximum heat use efficiency was attained in D1 - 5^th July, 2020 transplanted crop of brinjal (by acquiring its required GDD in lesser number of days). Among the varieties, the maximum heat use efficiency was exhibited by the brinjal variety Hisar Shyamal. The brinjal variety ‘Hisar Shyamal’ reported here to be more thermal energy/ heat use efficient when transplanted early on 5^th July.