اثر کودهای زیستی و شیمیایی نیتروژنه و فسفره بر عملکرد دانه و صفات کیفی ذرت شیرین

In order to evaluation of chemical fertilizers (nitrogen and phosphorus) and nitroxin biofertilizer (containing azospirillum, azotobacter and phosphate solubilizing bacteria from pseudomonas genus) and phosphate barvar2 (containing 2 strains of bacteria, p5 and bacteria p13) application on grain yield and some qualitative traits of sweet corn, an experiment was conducted as factorial split base on randomized complete block design with three replications at research farm of gachsaran agricultural education center in 2010-11. the main factor was included two factor of chemical fertilizers nitrogen (3, 50, 100 and 150 kg/ha) and nitroxin biofertilizer (with one lit/ha application and without application of nitroxin biofertilizer) and second factor was included four phosphorus compound (75, 150 kg/ha triple super phosphate, 75 kg/ha triple super phosphate with 100 g/ha phosphate barvar2 and 100 g/ha phosphate barvar2 without chemical fertilizer. results showed the most of chlorophyll a in 100 kg/ha nitrogen chemical fertilizer and 75 kg/ha phosphorus chemical fertilizer with application nitroxin and phosphate barvar2 biofertilizers treatment and the most of chlorophyll b and total chlorophyll contents, carotenoids and protein content in leaf and grain in the treatment of 150 kg/ha nitrogen and 75 kg/ha phosphorus chemical fertilizer with phosphate barvar2 and nitroxin biofertilizer application. the most of grain and leaf phosphorus and potassium contents was obtained with application of 150 kg/ha nitrogen and 100 g/ha of phosphate barvar2 and nitroxin biofertilizer.