V.Kumar,* D.K. Shahi, C.S.Singh, P.K.Dewangan and S.C. Pankaj
Department of Soil Science and Agricultural Chemistry, Ranchi Agriculture College, Birsa Agricultural University, Kanke, Ranchi – 834006, Jharkhand, India
Department of Agronomy, Ranchi Agriculture College, Birsa Agricultural University, Kanke, Ranchi – 834006, Jharkhand, India
Email: varunsahu53@gmail.com
Received-09.09.2020, Revised-28.09.2020
Abstract: A field experiment was undertaken to find out the effect of inoculation of AM and Azotobacter on N, P, K status on post harvest soil and uptake by maize( Zea mays L.) at BAU experimental Farm, Ranchi during rabi season 2015-16 on sandy clay loam soil. The experiment was laid out in a Factorial RBD with three levels of inoculants i.e. Arbuscular Mycorrhiza, Azotobacter and AM + Azotobacter were applied along with four levels of plant nutrients i.e. 0, 50, 75 and 100% recommended dose of fertilizer with combination of 12 treatments: 50% NPK + AM, 50% NPK + Azotobacter, 50% NPK + AM + Azotobacter, 75% NPK + AM, 75% NPK + Azotobacter, 75% NPK + AM + Azotobacter, 100% NPK + AM, 100% NPK + Azotobacter, 100% NPK + AM + Azotobacter, AM alone, Azotobacter alone and AM + Azotobacter, replicated thrice. The initial soil properties was EC (0.149 dSm-1), acidic soil (pH 5.4), low in organic carbon (3.3 g kg-1), available nitrogen (189 kg ha-1), medium in available phosphorus (20 kg ha-1) and available potassium (130 kg ha-1). The results revealed that the application of 100% NPK + AM + Azotobacter significantly increase the available nitrogen (214.7 kg ha-1) and phosphorus (27.9 kg ha-1) in post harvest soil and also increased availability of potassium (153.7 kg ha-1) in soil but not significantly. It also significantly increased total uptake of nitrogen (92.53 kg ha-1) and phosphorus (19.50 kg ha-1) except potassium (83.36 kg ha-1).
Keywords: AM, Azotobacter, Maize,NPK Uptake etc.
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