Effect of integrated nutrient management (INM) on available micro nutrients of pomegranate (Punica granatum L.) orchard soil

Abstract

A field experiment was conducted on “Effect of Integrated Nutrient Management on Disease Resistance of Pomegranate (Punica granatum L.) Orchards” during 2017-18 and 2018-19 at College of Agriculture, Golegaon, VNMKV, Parbhani. The experiment was laid out in randomized block design with seven treatments i. e. T1- Absolute Control, T2- Farmer’s Practices (½ RDF), T3- RDF (625:250:250 g N, P2O5, K2O tree-1), T4- INM (15 kg FYM + 8 ml Azotobactor, 8 ml PSB, 100 g Trichoderma + RDF), T5- RDF + Antibiotics (Streptocycline @ 250 ppm), T6- T4 + Antibiotics, T7- T4 + Umber (Ficus racemosa) Rhizosphere Hybridised Soil (URHS @ 25 kg per tree) and four replications. The result showed that maximum DTPA extractable micronutrients content i.e. Fe (5.88 and 4.81mg kg1), Zn (1.59 and 1.33mg kg-1), Cu (4.05 and 3.79mg kg-1), Mn (12.24 and 11.02mg kg-1) and available B (1.00 and 0.98mg kg-1) was recorded at flowering stage in FYM @ 15 kg, Azotobacter @ 8 ml per tree, PSB@ 8 ml per tree and Trichoderma @ 100 g per tree, 625:250:250 g N, P2O5 and K2O per tree and URHS @ 25 kg per tree (T7) at 0-22.5 and 22.5-45 cm depth, respectively. Similar trend was noticed at harvesting stage. However, minimum DTPA extractable Fe, Zn, Cu, Mn and available B content were recorded at absolute control.