Studies on effect of surface fertigation on nutrient uptake, Fue and economics of inter -specific hybrid BtCotton

A field investigation on Studies on effect of surface fertigation on nutrient removal, fertilizer use efficiency (FUE) and economics of inter-specific hybrid Btcotton was carried out at agronomy fieldunit, UAS, GKVK, Bangalore during kharif 2012. The experiment was laid out in randomized complete block design with 7 treatments and3 replications involving treatment combinations of 3 splits (T2 and T3), 4 splits (T4 and T5) and 5 splits (T6 and T7) at 75 and 100 percent dosages of RDF as compared to RDF through soil application.It was observed that significantly higher N, P and K uptake (160.99,28.57 and 134.87 kg ha-1, respectively) was recorded in 100 per cent RDF with fertigation in 5 splits. The higher nutrient uptake infertigation treatments was attributed to higher fertilizer use efficiency and nutrient availability in the soil as compared to RDF through soil application. Among different treatments, application of100 per cent RDF with fertigation in 5 splits recorded higher net returns (79231 Rs. ha-1) and B:C ratio (3.41). It is advisable to adopt5 splits application of all the major nutrients under surface fertigation to achieve higher cotton productivity and increasing B: C ratio, besides higher cost of cultivation

کلیدواژه ها:

Surface fertigation ، ، Fertilizer use efficiency ، Nutrient uptake ، ، RDF ،