Biochemical Changes, Nitrogen Flux and Yield of Crops due to Organic Sources of Nutrients under Maize Based Cropping System

Abstract

3 Abstract: Field exper iments were c onducted f rom June 2001 to A pril 2003 at Tamil Nadu Agricultural University, Coimbatore to e valuate the organic sources of nutrients and Panchagavya spray on the biochemical changes, nitrogen flux and yield of crops in t he m aize - sunflower - greengram cropping system. The experiment consisted of nine treatments comprising six treatments of organic sources of nutrients with and without Panchagavya (blend of five products obtained from cow) foliar spray; two treatments were recommended dose of fertilizers (RDF) with and without recommended foliar spray (RFS) and one control (neither-manured or fertilizer applied). The treatments were f itted i n a randomized block design replicated thrice. The study revealed that increased soluble protein content and N Rase activity of maize, sunflower and greengram was estimated with BGS and it was comparable to RDF to RFS, RDF and B iogas slurry (BGS) treatments in both the years. Increased ni trogen uptake at all growth stages of maize, sunflower and greengram was observed under B GS w ith Panchagavya. Higher yield of maize and sunflower were recorded under B GS w ith Panchagavya. G rain yield of greengram was higher under recommended fertilizer t reatments but it was comparable t o BGS w ith Panchagavya. Among al l the organic sources tri ed, BGS + Panchagavya sp ray proved to be a better so urce than others.