~ 1078 ~ Journal of Pharmacognosy and Phytochemistry 2020; 9(1): 1078-1082 E-ISSN: 2278-4136 P-ISSN: 2349-8234 JPP 2020; 9(1): 1078-1082 Received: 18-11-2019 Accepted: 22-12-2019 Pooja Goswami Assistant Professor, College of Agriculture, Balaghat, JNKVV, Jabalpur, Madhya Pradesh, India RS Singh Professor, Department of Agronomy, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, Madhya Pradesh, India Amita Sharma Assistant Professor, College of Agriculture, Balaghat, JNKVV, Jabalpur, Madhya Pradesh, India Corresponding Author: Pooja Goswami Assistant Professor, College of Agriculture, Balaghat, JNKVV, Jabalpur, Madhya Pradesh, India Effect of different fertilizer doses and bio- inoculants on yield, nutrient content and economics of summer mungbean ( Vigna radiata L.) Pooja Goswami, RS Singh and Amita Sharma Abstract A field experiment was conducted during summer season of 2011-12 and 2012-13 at the Agricultural Research Farm, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi (U.P.) to study the effects of fertility levels (25 and 50 kg P2O5 ha -1 , 25 kg S ha -1 and 3 kg Zn ha -1 ) and bioinoculants (PSB, Trichoderma and PSB + Trichoderma) on yield, yield attributes, protein content, protein yield and economics of summer mungbean. The results revealed that application of 50 kg P2O5 ha -1 + 25 kg S ha -1 + 3 kg Zn ha -1 and seed inoculation with PSB + Trichoderma recorded significantly higher grain yield and yield attributes viz., pods plant -1 , grains pods -1 and 100 seed weight over other fertility levels during both the years. The combined application of PSB and Trichoderma out performed PSB and Trichoderma alone. Maximum values of yield, yield attributes, protein content and protein yield were obtained with dual seed inoculation with PSB + Trichoderma which were found significantly superior to PSB and Trichoderma alone. It was also observed that application of 25 and 50 kg P2O5ha -1 along with 25 kg S ha -1 and 3 kg Zn ha -1 was found significantly superior over phosphorus alone. Increasing levels of phosphorus upto 50 kg P2O5 ha -1 increased yield and yield attributes, protein content and protein yield during both the years of study. Keywords: Fertility levels, P2O5, S, Zn, PSB, trichoderma Introduction India is the largest producer, consumer and importer of pulses in the world. In India, pulses occupy an area of about 24.78 m ha with the production of 22.95 mt. (Directorate of Economics and Statistics, Department of Agriculture and Cooperation-2012). Pulses are important for existing farm production system as it adds nitrogen in the soil and provides food and nutritional security to large number of vegetarians and weaker section of the society who cannot afford other sources of protein (Kokate et al., 2013) [14] . Among pulses, mungbean (Vigna radiata L.) is one of the most important pulse crops of India ranking third after chickpea and pigeon pea (Sathymoorthi et al., 2008) [21] . After the harvest of wheat and before the transplanting of rice, the land remains fallow for 65 – 70 days (late March/April to early July). This period could be used to raise a catch crop of summer mungbean to accomplish resources efficiency, resource maximization productivity, profitability and prosperity to the farmers besides sustaining soil health (Anbumani et al., 2003) [1] . Phosphorus has novel function of special importance in the process of energy storage and transfer. Some species of phosphorus solubilizing bacteria like Bacillus polymyxa and Pseudomonas striata are known to have the ability to solubilize phosphorus from insoluble sources (Gupta et al., 2009) [10] . Trichoderma spp. is among the most commonly isolated soil fungi due to their ability to protect plants and contain pathogen populations under different soil conditions. Trichoderma spp. was found to be most effective organic phosphorus mobilizer as compared to other fungi (Tarafdar et al., 2003) [27] and also possess strong antagonistic activity against soil borne plant pathogenic fungi (Bennett and Lane, 1992; Kumar and Mukerji, 1996) [4, 13] apart from promoting vegetative growth in plant. Sulphur is one of the essential plant nutrients classified as secondary nutrient. Legumes require almost equal amount of phosphorus and sulphur. When phosphorus and sulphur are present below the critical level in the soil, plant growth and quality of produce are affected adversely (Dubey and Mishra 1970) [9] . Sulphur application increased the total chlorophyll content in mungbean (Poorani, 1992) [17] . Sulphur plays a dominant role in improving the quality of pulses (Pasricha and Fox, 1993) [18] . Singh and Yadav (1997) [22] indicated that mung beans quite responsive to sulphur application.