Impact of integrated nutrient management on soil properties and plant nutrient uptake in summer maize (Zea mays)

摘要

A field experiment was carried out at Assam Agricultural University, Jorhat during the year 2019 to study the post- harvest nutrient status of soil as affected by integrated nutrient management (INM)in summer maize. The experiment was laid-out in a randomized block design with nine treatments and replicated thrice. The soil of the experimental site was sandy loam in texture, acidic in reaction, medium in organic carbon (0.72), low in available N (156.19 kg/ha) and medium in available P_2O_5 (23.78 kg/ha) and K_2O (161.50 kg/ha). The maize seed of the variety VMH-53 was sown on 15~(th) of March (2019) and harvested by two pickings on 10~(th) June and 15~(th) June. Experimental findings revealed that the nitrogen, phosphorus and potassium uptake were highest under the 100 RDF + Azospirillum + PSB + 2 sprays of vermiwash at 25 40 DAS which was at par with 75 RDF + 25 of N replaced by vermicompost + Azospirillum + PSB + 2 sprays of vermiwash at 25 40 DAS (T_6). However, the nutrient status of the soil did not differ significantly due to different INM practices, the available nutrient status decreased as compared to initial status.