Effect of drought on growth attributes of tomato (Lycopersicon esculentum Mill.) genotypes
2010
Chavan, M.L. | Janagoudar, B.S. | Dharmatti, P.R. | Koti, R.V.
Studies were undertaken to find the detrimental effect of dronght on growth attributes of tomato (Lycopersicon esculentum Mill.) plants were evaluated in the field experiment at KRC College of Horticulture, Arabhavi, Karnataka. Experiment was laid out with two levels of irrigation and 50 tomato genotypes by adopting factorial RBD with two replications. Drought was imposed two weeks after transplanting in both the IW/CPE ratio (ratio of irrigation water to cumulative pan evaporation) of 0.40 and 1.20 treatments. Irrigation was given when the pan evaporation reading reached 41.66 mm (1.20 IW /CPE ratio) and 125 mm (0.40 IW /CPE ratio). As the stress increased from 1.2 to 0.4 IW /CPE ratio, there was reduction in LAI, NAR and RGR was noticed at all the growth stage whereas, per cent light transmission was increased. At 45 DA T, irrespective of the irrigation levels, genotype L-3 had significantly maximum LAI, 75 DAT and at harvest, significantly maximum LAI was found in the genotype L- 33. During 45-75 DAT, genotype Arka Meghali had significantly higher NAR and RGR, and genotype GK-3 recorded significantly maximum NAR and RGR at 45 DAT- harvest whereas, during 75 DAT to harvest, the genotype L-13 recorded significantly maximum NAR and L-30 recorded significantly higher RGR. Among the genotypes, L-37 recorded significantly maximum per cent light transmission
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