M M Kulkarni, M M Burondkar, K D Kelkar, C D Pawar, N B Gokhale and P M Haldankar
Influence of irrigation and intensity of light on physiological attributes of mango (Mangifera indica L.) Cv. Alphonso” experiment was conducted at College of Agriculture, Dapoli, the west coast Konkan region of Maharashtra. There are 8 light intensities treatments viz. 2000 pfd, 1750 pfd, 1500 pfd, 1250 pfd, 1000 pfd, 750 pfd, 500 pfd, 250 pfd (provided by Li-cor 6400 Portable photosynthesis system) while irrigated and non-irrigated plants were sub treatments. The physiological attributes considered were rate of photosynthesis, stomatal conductance, rate of transpiration and intracellular CO2 concentration. It revealed that irrespective of sub treatments the light saturation point (at which rate of photosynthesis is maximum) of mango Cv. Alphonso in Konkan condition was recorded 750-1000 pfd. showing the maximum rate of photosynthesis was 10.91 μ mol CO2 m-2 Sec-1. Irrigated plants showed significantly maximum physiological functioning. The data showed that the rate of photosynthesis in irrigated plants (11.52 μ mol CO2 m-2 Sec-1) was 204.16% more than non-irrigated plants (3.63 μ mol CO2 m-2 Sec-1), the stomatal conductance in irrigated plants (0.1547 μ mol H2O m-2 Sec-1) was 189.09 % more than non-irrigated plants (0.0510 μmol H2O m-2 Sec-1) and the rate of transpiration in irrigated plants (4.5432 μ mol H2O m-2 Sec-1) was 119% more than non-irrigated plants (2.0439 μ mol H2O m-2 Sec-1), where the intracellular CO2 concentration in irrigated plants (245.25 μmol CO2mol air-1) was 6.76 % less than non-irrigated plants (263.05 μmol CO2mol air-1). It showed that the photosynthesis and other physiological activities are better in irrigated plants at 750-1000 pfd at costal conditions in Konkan.
Published Date: 2020-12-29; Received Date: 2020-11-15