Effect of Phosphorus and Biofertilizers on growth, yield and quality of Summer Greengram (Vigna radiata L.) after wheat crop
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Date
2021-07
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ANDUAT, Kumarganj, Ayodhya
Abstract
The present investigation was carried out in Zaid (Summer) season 2018-19 and 2019-20 at Agronomy Research Farm of Acharya Narendra Deva University of Agriculture and Technology, Kumarganj, Ayodhya (U.P). The 12 treatments comprised of four phosphorus levels viz., 0, 20, 40 and 60 kg P2O5 ha-1 with three seed inoculants viz., Phosphate solubilising bacteria (PSB), Rhizobium and PSB + Rhizobium were tried in Randomized Block Design (RBD). The soil was silty-loam texture with slightly alkaline pH 8.1, organic carbon 0.37 %, available nitrogen 176.00 kg ha-1, available phosphorus 15.20 kg ha-1, and available potash 210.0 kg ha-1 during 2018-19 and 2019-20. The rainfall received during the crop period in first and second year was 56.8 and 476.8 mm, respectively. The relative humidity was recorded maximum during month of June in both the years of study while, the sunshine ranged from 5.6 to 9.8 hours during the first year and 1.5 to 10.2 hours during second year. Increasing levels of phosphorus significantly increased most of the growth and yield attributing characters viz., plant height, leaf area index, number of branches, number of nodules plant-1, dry matter accumulation, root length, root dry weight, root volume, root spread and yield attributes viz., number of pods plant-1, number of grains pod-1, pod length and test weight were significantly higher with 60 kg P2O5 ha-1 and superior to other doses of phosphorus. All the growth characteristics, yield attributes and yield were also increased significantly due to seed inoculants. Seed inoculants PSB + Rhizobium increased significantly all these characteristics as compared to PSB and Rhizobium alone. The N, P, K and protein content and uptake of nutrient increased with increasing levels of phosphorus. The highest nutrient content and uptake were recorded with 60 kg P2O5 ha-1 with PSB + Rhizobium. The highest benefit cost ratio (2.85 and 3.31) was recorded with 60 kg P2O5 + PSB + Rhizobium while lowest (0.45 and 0.62) with control + PSB during respective years. Thus for obtaining better yield and profit apply 60 kg P2O5 ha-1 in combination with seed inoculant PSB + Rhizobium for summer greengram after wheat crop.
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