TY - JOUR T1 - Effect of Vermicompost and Nitrogen on Growth, Concentration, and Uptake of Nutrients in Sunflower TT - اثر ورمی کمپوست و نیتروژن بر رشد رویشی، غلظت، و جذب عناصر غذایی آفتابگردان JF - JSTNAR JO - JSTNAR VL - 18 IS - 67 UR - http://jstnar.iut.ac.ir/article-1-1529-en.html Y1 - 2014 SP - 217 EP - 227 KW - Sunflower KW - Vermicompost KW - Nitrogen KW - Nutrient. N2 - A study was conducted to evaluate the effect of vermicompost and nitrogen (N) on growth, nutrient concentration and uptake of N, phosphorus (P), potassium (K), iron (Fe), zinc (Zn), manganese (Mn), and copper (Cu) in sunflower shoots as a factorial experiment arranged in completely randomized design (CRD) with three replications under greenhouse conditions. Treatments included three levels of vermicompost (0, 2.5, and 5 % by w/w) and three N levels (0, 90, and 180 mg kg-1) as urea. Application of 2.5% vermicompost significantly increased the average fresh and dry weights, and uptake of K, Fe, Zn, Mn, and Cu of shoots as compared when no vermicompost was applied, but decreased Zn and Cu concentrations. Application of 90 mg N, increased fresh and dry weights, and concentration of N, Zn, and Mn, total uptake of N, P, K, Fe, Zn, Mn, and Cu in sunflower shoots, but decreased P concentration. Application of 180 mg N increased total N uptake than that of 90 mg N kg-1 treatment. Combination of 2.5% vermicompost with 90 mg N, significantly (p M3 ER -