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 |
Nutrient supply and availability during crop growth influences various microbial mediated biochemical reactions and nutrient transformations. Studies were conducted during kharif season of 2015-16 and 2016-17 in the farmer field of Vijayanagar camp, tq/dist: raichur, to study the influence of different nutrient management approaches on soil enzyme activity, soil microbial population and grain yield of dry DSR. Dehydrogenase activity, a key biochemical indicator, was higher (12.09 μg TPF formed g-1 soil hr-1) with application of nutrients as per SSNM approach for targeted yield of 55 q ha-1 in Dry DSR. Farmers’ practice of excessive fertilizer application had negative impact on dehydrogenase activity. The highest phosphatase activity (14.91 μg PNP g-1 soil hr-1) of soil was found with application of nutrients as per targeted yield approach as compared to absolute control (9.47 μg PNP g-1 soil hr-1). Application of nutrients as per SSNM approach for targeted yield of 55 q ha-1 for Dry DSR registered significantly higher soil microbial population viz., bacterial (25.73×106 cfu g-1 of soil), fungal (8.62 × 103 cfu g-1 of soil) and actinomycetes (10.14 × 104 cfu g-1 of soil) and significantly higher the grain and straw yield (54.73 and 68.38 q ha-1, respectively) of dry DSR over farmers practice and other soil test methods.
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