National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
A field study was conducted during Kharif 2016 at the research farm of ICAR Complex for NEH Region (Umiam) Barapani, Meghalaya to find out the effect of different nutrient management practices and microbial inoculants on microbial properties in soil of lowland rice in Eastern Himalayas. The experiment was laid out in split plot design with 12 treatment combinations and 3 replications. The main plots consisted of 3 different nutrient management practices viz. 100% organic, 100% inorganic (recommended dose of fertilizer-RDF) and integrated nutrient management- INM (75% RDF+ 25% FYM) while in the sub plot there were 4 treatments viz. control, Azospirillum, Azospirillum + PSB, Azospirillum + PSB + ZnSB. Results showed that soil alkaline phosphatase activity was found to be higher at 60 days after transplanting (DAT) and it declined at harvesting stage. The highest value of alkaline phosphatase activity was recorded under organic nutrient management at 60 DAT (162.58 μg p-NP/g soil/ hr) and at harvest (105.92 μg p-NP/g soil/ hr) and at both the stages it was significantly higher than INM and inorganic treatment. Similarly the highest value (174.49 µg/g dry soil) of MBC was recorded at 60 DAT and it declined at crop harvest stage (90.73 µg/g dry soil). Values of Fluorescein diacetate activity (FDA) were the highest (11.80 μg fluorescein/g soil/hr) at 60 DAT and declined further at crop harvest stage (8.84 μg fluorescein/g soil/hr). The lowest values of all the three parameters were observed in case of inorganic nutrient management practices. The results clearly indicated that organic nutrient management was responsible for higher microbial activities in the soil.
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