Leaf nutrient status, growth and flower yield in rose as influenced by organic and inorganic sources

A field experiment was conducted to partially substitute the chemical fertilizers by organic manures and bio-fertilizers in rose cv. Gruss-an-Teplitz. Treatments consisted of T0 (control), T1 (full dose of NPK @ 50,40, 30 g/m2 by chemical fertilizers), T2 (4 kg FYM + remaining required dose of NPK by chemical fertilizers), T3 (T2 + Azotobacter), T4 (T2 + PSB), T5 (2 kg poultry manure + remaining required dose of NPK bychemical fertilizers), T6 (T5 + Azotobacter), and T7 (T5+PSB), T3 treatment significantly increased leaf N concentration; whereas maximum P and K content was recorded with T4, Application of full dose of NPK supplied by chemical fertilizers (T1) significantly increased leaf area index, whereas T3 treatment resulted in maximum plant height. T1 treatment also significantly increased individual flower weight during winter and summer seasons and number of flowers and yield of flowers/ha, whereas number of flowers and yield were at par with T3 (4 kg FYM + remaining required dose of NPK by chemical Fertilizers + Azotobacter) treatment.