Open AccessEffect of urea modified hydroxyapatite nano fertilizer on nitrogen release pattern in red soil
Author(s) -
C. M. Rashmi,
Sadguru Prakash
Publication year - 2021
Publication title -
international journal of agricultural sciences/international journal of agricultural sciences
Language(s) - English
Resource type - Journals
eISSN - 0976-5670
pISSN - 0973-130X
DOI - 10.15740/has/ijas/17.2/271-275
Subject(s) - zoology , fertilizer , urea , nitrogen , incubation , chemistry , nitrate , veterinary medicine , biology , biochemistry , medicine , organic chemistry
A laboratory incubation study was conducted during 2018 at College of Agriculture V.C. Farm, Mandya using CRD design with eight treatments and three replication. Treatments included were T1:100% Nitrogen-Urea (NU), T2 to T4: NU: UHA @ 75:25, 50:50 and 25:75 per cent, respectively and T5 to T7: UHA @ 50, 75 and 100%, respectively, T8: Absolute control. Results revealed that application of 100 per cent N through nano UHA increased the content of ammonical-N at 5 DAI (653.3 μg g-1) but the content decreased at 10 DAI (583.3 μg g-1) and increased to 716.7 μg g-1 at 15 DAI and maintained it upto 20 DAI while, it decreased at 45 DAI. The nitrate –N release was highest (596.7 μg g-1) at 10 DAI in T7 treatment and maintained it upto 20 DAI and decreased at 45 DAI. Similar pattern was observed with the application of 75 and 50 per cent N-UHA treatments (T6 and T5, respectively). The amount of release of ammonical and nitrate N was proportional to the amount N added through UHA at any sampling interval.