RAJNEESH KASHYAP, ROHAN BAJAJ, SANDRA SAJEN, AMRIT RAJ AND JEPHIN VARUGHESE JOSE
Abstract
In plant, if amount of Nitrogen (N) is low or in excess, then plant growth is hindered also it affects nutrient uptake. Phosphorus (P) deficiency makes the leaf dull grayish green or red pigmented at leaf base or even plant growth is retarded, while in excess it reduces absorption of other important plant micro-nutrients. Potassium (K) deficiency affects the plant seeds and fruits. Excess potassium may lead to deficiency of other nutrients like magnesium and calcium. The study is mainly focused on estimating the level of NPK content in plant species, found in controlled and polluted areas in Vellore district. Leaves of Peltophorum Ferrugenium and Lagestroemia speciosa were collected and after digested they were treated with Nesslers Reagent, for nitrogen and potassium estimation, whereas in case of phosphorous estimation, ascorbic acid was used. They were then analyzed using spectrophotometer. The parameters were found to be greater in plant leaves from environment with relatively high pollution than the control.