STUDIES ON EFFECT OF FOLIAR NUTRITION ON MORPHO- PHYSIOLOGICAL CHANGES AND PRODUCTIVITY OF RAINFED BLACKGRAM (Vigna mungo L.)
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Date
2017-07-30
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UNIVERSITY OF AGRICULTURAL SCIENCES, RAICHUR
Abstract
Crop productivity in blackgram being low in North eastern dry zone of Karnataka a field experiment was conducted during kharif 2016 at Agricultural Research Station, Kalaburagi, UAS Raichur, to study the effect of foliar nutrition on morpho-physiological changes and productivity of rainfed blackgram using TAU-1 variety. Among different sources of nutrients, foliar spray of pulse magic (combination of nutrients and PGR) @ 10 g/l during flowering stage recorded significantly higher growth attributes viz., leaf area (5.94 dm2 plant-1) and leaf area index (1.98) at 55 days after sowing and it is also recorded that higher photosynthetic rate (29.70 ยต mol CO2 m-2 s-1), transpiration rate (5.87 m mol H2O m-2 s-1) and chlorophyll a, b (2.587, 0.993 mg g-1 fresh wt.) were higher in same treatment at 55 DAS. Further, these attributes are positively co related to seed yield. The highest no. of seeds pod (8.7), pod length (6.1 cm), test weight (55.1 g) and seed yield (1101 kg ha-1) was recorded with foliar spray of pulse magic along with recommended dose of fertilizers, lower (4.8, 3.6 cm, 48.9 g and 894 kg ha-1, respectively) was obtained in treatment were only recommended dose of fertilizers (25:50 kg N: P2O5 ha-1) were applied and the lowest (3.0, 2.2, 16.6 g and 482 kg ha-1, respectively) was obtained in plot were no basal dose of fertilizers were applied and also no foliar spray was given, realizing the importance of nutrition. The higher gross returns (Rs.60555 ha-1) and net returns (Rs.35047 ha-1) were also highest due to foliar spray were seed yield was highest.
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