Effect of bio-fertilizer on growth and yield of cowpea [Vigna unguiculata (L.) Walp] var. Kashi Kanchan under foot hills of Arunachal Pradesh.
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Date
2015-11-17
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College of Horticulture and Forestry, Central Agricultural University, Pasighat
Abstract
The present investigation was carried out during zaid in 2014 at the Experimental Farm, Department of Vegetable Science, College of Horticulture and Forestry, Central Agricultural University, Pasighat, Arunachal Pradesh. The experiment was laid out in Factorial Randomized Block Design with 12 treatments, three levels of P (0, 20 and 40kg/ha) and four levels of bio-fertilizer (Control, Rhizobium @ 10ml/ kg seed, PSB @ 10ml/ kg seed and Rhizobium + PSB each @ 10ml/ kg seed) with three replications. The uniform doses of N and K @ 20 kg/ha along with 10 t/ha FYM were applied to all the treatments. Main effect of phosphorus, bio-fertilizer and their interaction effects were studied for days to 50% germination, days to 1st flowering, plant height, number of leaf per plant, leaf area index(LAI), stem girth, number of branches per plant, root length, number of nodules per plant, total dry matter production, pod yield, physio-chemical properties of soil (pH, , available N, P, K and organic carbon) before sowing and after harvesting and uptake of N, P, and K by plant.
In the main effect of phosphorus, treatment P40 (20 : 40 : 20 kg NPK/ha + 10 t/ha FYM) showed the significantly superior performance with respect to almost all the growth parameters, yield, available soil nutrient and nutrient uptake by plant, except days to 50% germination, days to 1st flowering, plant height (at 15 and 30 DAS), number of leaves (at all the stages) and stem girth (at 30 DAS). Among the bio-fertilizers, the effect of B3 (inoculation of seed with Rhizobium + PSB along with application of 20 kg N, 20 kg K2O and 10 FYM/ha.) was found significantly superior for all the growth parameters, yield, available soil nutrient and nutrient uptake by plant, except days to 50% germination, days to 1st flowering, plant height (at 15 and 30 DAS), number of leaves (at all the stages), stem girth (at 30 DAS) and number of branches per plant (at 45 DAS).
In interaction effect, P40B3 (inoculation of seed with Rhizobium + PSB along with application of 20 : 40 : 20 kg NPK/ha + 10 t/ha FYM) proved to be superior for all the growth parameters at later stages (45th and/or 60th DAS) of crop growth, while it was statistically at par with treatment P20B3 (inoculation of seed with Rhizobium + PSB along with application of 20 : 20 : 20 kg NPK/ha + 10 t/ha FYM) in most of the growth parameters. The treatment combination, P40B3 also recorded significantly higher green pod yield (196.4 g/plant, 10.64kg/plot and 120.90 q/ha) including available soil nutrient status viz., pH (6.20), N (370.89 kg/ha), P (38.57 kg/ha), K (168.77 kg/ha) and organic carbon (2.8%) and NPK uptake by plant after harvesting. Hence, the treatment P40B3 (application of 20 : 40 : 20 kg NPK/ha + 10 t/ha FYM along with inoculation of seed with Rhizobium + PSB) was considered the best treatment among the other treatments with respect to growth and yield parameters along with physio-chemical properties of soil and nutrient uptake by plant in cowpea variety Kashi Kanchan.
Description
The present investigation was carried out during zaid in 2014 at the Experimental Farm, Department of Vegetable Science, College of Horticulture and Forestry, Central Agricultural University, Pasighat, Arunachal Pradesh. The experiment was laid out in Factorial Randomized Block Design with 12 treatments, three levels of P (0, 20 and 40kg/ha) and four levels of bio-fertilizer (Control, Rhizobium @ 10ml/ kg seed, PSB @ 10ml/ kg seed and Rhizobium + PSB each @ 10ml/ kg seed) with three replications. The uniform doses of N and K @ 20 kg/ha along with 10 t/ha FYM were applied to all the treatments. Main effect of phosphorus, bio-fertilizer and their interaction effects were studied for days to 50% germination, days to 1st flowering, plant height, number of leaf per plant, leaf area index(LAI), stem girth, number of branches per plant, root length, number of nodules per plant, total dry matter production, pod yield, physio-chemical properties of soil (pH, , available N, P, K and organic carbon) before sowing and after harvesting and uptake of N, P, and K by plant.
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