effects of various rates and concentrations of n-p-k on growth ‘rio grande’ tomato seedling

Tomato (l.ycopersicon esculentum mill.) cv. rio grande seedlings were nutritionally conditioned with solutions complete fertilizer n(60% no3+40% nh4)-p-k (20-20-20) , n(30%no3+70% nh4)-p-k (15- 5-30) , the first two week n(60% no3+40% nh4)-p-k (20-20-20) and later two week n(30%no3+70% nh4)-p-k (15-5-30) and vice versa were applied in completely randomized experiment with three replications to determine the effect of nutritional regimes on tomato transplant growth. as nitrate rate increased from 30% to 60%, fresh shoot weight, plant height, stem diameter, leaf number, leaf area, shoot and root dry weights, and total chlorophyll increased. in the 750 mg/lit of n( 60% no3+40%nh4 )-p-k (20-20-20) were decreased and it is with to increasing in stem diameter and total plant growth , application of n(60%no3 + 40%nh 4 )-p-k(20-20-20) in the first two weeks of seedling growth and n(30%no3+70%nh4)-p-k (15-5-30) in the last two weeks in the concentration of 200 mg/liter seedling height decreased.