Vol. 12, Issue 5 (2023)

Author(s):
KK Chauhan and MM Lunagaria

Abstract:
The differences of microclimatic parameters viz; Photosynthetically Active Radiation (PAR), Air temperature and Relative humidity (RH) in capsicum canopy at three heights for PAR (ground level, middle level and effective canopy height) and at two heights for air temperature and relative humidity (ground level, effective canopy height) and their comparison with the different vegetative phases were studied. The microclimatic data were obtained at the field experiment conducted at Horticulture farm of Department of Horticulture, BACA, Anand Agricultural University, Anand, Gujarat during October 2017 to March 2018 from the canopies of capsicum crop under open ventilated greenhouse. It was found, that capsicum canopy microclimate differed significantly at different height. The vertical profile of PAR shows that at the ground level, PAR was ranged from 27 μ mol m⁻² s⁻¹ to 52 μ mol m⁻2 s⁻¹, and it gradually increased. There wasn’t any significant difference in air temperature between top of the canopy and at ground level. This indicates that the crop has experienced uniform thermal condition at different part of the canopy. It was observed that relative humidity was higher at ground level as compared to canopy level due to lower air exchange at the ground level.