author(s)
Javad Amiri, Deepika Kurre and Mangesh M Bhosale

abstract
In the present experiment, effects of organic (chicken droppings and cow dung) and inorganic fertilizers (urea and single super phosphate) on aquatic productivity was studied with a view to standardize minimum effective dosage for getting higher primary productivity without affecting physic-chemical parameters. The present experiment was conducted in 27 plastic tubs (75 Ltrs) for 60 days trial. The results showed significance different (P<0.05) in physic-chemical parameters and primary productivity among different treatments. Temperature (26-32°C) and alkalinity (183 to 264 mg/L) remained within range, but dissolved oxygen and pH showed declining trend except pH in T3 (8.00±0.65). Highest primary productivity was observed in tanks fertilized with inorganic fertilizers (489.37 gm) and was remained stable throughout the experiment (525.3±2.53 mgC/m3). Higher amount of organic manuring depleted water quality while lower amount lead to insufficient primary productivity. Hence, the present protocol can be utilized by small farmers doing extensive or semi-intensive farming to reduce input cost.