Effect of slow release urea nano fertilizer on soil microflora and yield of direct seeded rice (Oryza sativa L.)
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Date
2023
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Punjab Agricultural University
Abstract
The present work aimed to study the effect of a slow release urea nanofertilizer on soil microflora and yield of direct seeded rice (Oryza sativa L.). A soil column study indicated slow-release pattern of the urea from the nano-urea product varied for the soil samples having three different textures (low, medium and heavy).The leachate analysis revealed release of ammonical and nitrate nitrogen from the synthesized product. Further, the effect of the nanourea fertilizer on soil microflora study identified that the viable cell counts for a variety of soil microbes were not negatively affected on application of different doses of nanourea fertilizer. The soil urease, protease, and dehydrogenase enzyme activities exhibited significant increase in nano urea (100% RDN) treatment in light textured soil. A field experiment was performed to observe the effect of nano urea fertilizer on the growth and yield of direct seeded rice. An increase in the plant height, shoot and root fresh weight and dry weight was recorded for different doses of Nitrogen applied through nano urea and conventional urea N-fertilizer level for plants sampled after every 30 days after sowing till three months of the growth. The maximum plant growth was recorded for treatments which received 100% of the recommended N-fertilizer. Likewise, the yield attributing traits particularly the number of filled grains and thousand grain weight increased on application of 100% Recommended dose of N through nano urea. The soil chemical parameters were recorded to be non-significantly altered for plant and grain nutrient content (NPK content) at nano-urea fertilizer (100% RDN). Non-significant effect was recorded for the soil microbial viable cell count on different doses of nano-urea fertilizer. These results indicate the use of nano-urea fertilizer as a possible alternative for conventional urea fertilizer.
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Yashika (2023). Effect of slow release urea nano fertilizer on soil microflora and yield of direct seeded rice (Oryza sativa L.) (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.