Effects of Different Levels of Supplementary Nitrogen and Potassium in Nutrient Solution on Yield and Leaf N and K Concentrations of Tomato

摘要

The effects of different levels of nitrogen (100, 200, 300 and 400 mg/L) and potassium (125, 250 and 375 mg/L) on yield and leaf N and K concentrations of tomato were investigated in perlit culture using a factorial randomized design with three replications. The highest fruit yield was obtained with 200 mg/L N. Higher levels of nitrogen decreased tomato yield. With increasing nitrogen concentration in nutrient solution, N content of leaf increased significantly whereas leaf K concentration decreased. Different potassium levels had no significant effect on tomato yield. With increasing potassium levels of nutrient solution, concentration of leaf N decreased significantly whereas concentration of leaf K increased. The greatest and the least fruit yields were obtained from N200K250 and N400K375 treatments, respectively. The highest and the lowest concentrations of leaf N were observed in N400K125 and N100K375 treatments, respectively. The greatest and the least concentrations of leaf K were observed in N100K375 and N400K125 treatments, respectively. Keywords: Tomato, Yield, Nitrogen, Potassium, Perlite. Full-Text Type of Study: Research | Subject: General Received: 2010/07/25 Send email to the article author Related Websites Scientific Publications Commission - Health Ministry Scientific Publications Commission - Science Ministry Yektaweb Company Site Keywords ?????, Academic Journal, Scientific Article, ???? ????? ??, ???? ????? ??, ???? ????? ??, ???? ????? ??, ???? ????? ??, ???? ????? ??, ???? ?? Vote ? 2015 All Rights Reserved | Journal of Science and Technology of Greenhouse Culture -Isfahan University of Technology