Journal of FARM SCIENCES, Vol 31, No 5 (2018)

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Studies on off season production of field beans (Lablab purpureus L.) in coastal Andhra Pradesh

E. PADMA, K. UMAJYOTHI, G. RAMANANDAM, P. SUBBARAMAMMA, K. UMA KRISHNA

Abstract


The present investigation to ascertain the best suitable variety with appropriate sowing date and to study theinfluence of growth regulators for off season production of field bean for coastal Andhra Pradesh in open field and undershade net conditions was carried out during summer 2014-15 and 2015-16 at the Horticultural Research Station, Ambajipeta,East Godavari District of Andhra Pradesh. The experiment was laid out with 36 different treatment combinations in aFactorial Randomized Block Design each replicated thrice in open field and under shade net. Two experiments were carriedout with four varieties viz., Arka Jay (V1), Arka Amog (V2), Arka Sambhram (V3), and Arka Sowmya (V4), with threedifferent dates of sowing viz., December 15th, (S1), January 1st (S2), and January 15th (S3), with foliar spray of growthregulators viz., NAA 25 ppm (G1), Triacontanol 2 ppm (G2), and control (G3). In these two experiments (open and shadenet conditions) data were recorded on various growth, yield and quality parameters including nutrient uptake by theplant and the data were statistically analyzed based on ANOVA and least significant difference was used to differentiate thetreatments. The growth characters viz., the plant height, primary branches, secondary branches and leaf area were higher forall the treatment combinations in open field when compared to shade net. Arka Sowmya sown on 1st January and sprayedwith Triacontanol 2 ppm (V4S2G2) proved better for number of flower buds per raceme, number of nodes per raceme.Further, Arka Sambhram sown on January 1st in combination with Triacontanol spray (V3S2G2) recorded maximum fruit setin open field and Arka Jay sown on January 1st in combination with Triacontanol 2 ppm spray (V1S2G2) recorded maximumfruit set in shade net house. Arka Sowmya recorded the highest pod yield per hectare (262.12 and 163.27 q/ha, respectively)in open field and shade net house respectively when sown on January 1st and sprayed with Triacontanol 2 ppm foliarspray (V4S2G2). In both open field and shade net experiments, highest benefit cost ratio was recorded in Arka Sowmya(3.97 and 2.47, respectively), when sown on January 1st with Triacontanol 2 ppm foliar spray at 30 and 60 DAS (V4S2G2).

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