Study of effect of different shading factors on photo synthetically active radiation (PAR) (µ mol m-2 s-1), transpiration rate and stomatal conductance rate of tomato plant under Shadenet house condition

The studies was performed by conducting the field experiments under different shadenets at the Instructional Farm of Department of Irrigation and Drainage Engineering, Dr. Annasaheb Shinde College of Agricultural Engineering and Technology, Mahatma Phule Krishi Vidyapeeth, Rahuri during rabi seasons of 2013-14. Result shows that photosynthetically active radiation decreased with increase in shading levels. Maximum PAR was found in open field (0 shadenet) as compared to other shades. Treatment wise mean PAR values were near about similar over the season in both years under same shade. The transpiration rate and stomatal conductance rate of tomato plant increased with the advancement of age of crop during both the years. During the year 2013-14 average transpiration rate and average stomatal conductance rate was found maximum due to T1(75% x 0.95 ETc) i.e., (6.82 m mol m-2 s-1) and (0.61 m mol m-2 s-1) .During the year 2014-15 average transpiration rate and average stomatal conductance rate was found maximum due toT1 (75% x 0.95 ETc) i.e. (7.37 m mol m-2 s-1) and (0.74 m mol m-2 s-1).