PJB-2023-616
OPTIMIZATION OF NEEM OIL THICKNESS FOR PREPARATION OF SLOW-RELEASE UREA IN WHEAT UNDER POT CONDITIONS
AMIR AZIZ
Abstract
The purpose of the present study was to study the effect of slow-release fertilizers on nitrate leaching, its distribution in soil profile and yield in wheat cultivation. Presently, there is a growing interest in developing new controlled-release fertilizers based on ecological raw materials. The present study aims to compare for number of coating layers of neem oil on urea granules was investigated and different parameters were monitored. Comparing several coating layers, the higher release was seen from single coating than double and triple coating at an early stage of fertilizer application indicating a poor and less efficient coating. Triple coating extraordinarily suppressed the release that might not match with plant needs. In the second study, Different physiological parameters and crop yield were measured by comparing the different levels (75, 50, and 25 %) of neem oil-coated fertilizer with untreated fertilizer and Control. At pot study result, on the microscale the reduced dose (75 %) fertilizer favored a better global response in the photosynthetic parameters and nutritional status of wheat plants. A significant increase in grain weight yield and grain number was obtained with the neem oil 75 % higher in respect to the uncoated one. Our results showed that the new neem oil-coated urea fertilizer facilitated crop management and reduced the environmental impact generated by N losses, which are usually produced by traditional fertilizers. All laboratory and pot experiments were arranged following a completely randomized design Thus, using naturally occurring neem oil as coating material had the potential to not only enhance the growth, yield, and nitrogen use efficiencies but also control negative effects on the environment
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