Effect of cultivar, Potassium soil fertilization and Zinc spraying on vegetative growth and yield parameters of Rice

Abstract

An experiment was conducted at Al- Mishkhab Rice Research Station for growing season of 2001 and 2002. The aim was to study the effect of three cultivars of Rice, viz. (Al- Somood, Yasmin and Al- Bernamag 4) and Fertilization levels (Soil application by K and foliar application by Zn), 8 treatments were used: 1. Control: with out any fertilization. Neither K application nor Zn application. 2. K as K2SO4 at rate of 30 Kg D. 3. 0.5 Zn as ZnSO4.7H2O. (0.5 g L. water). 4. 0.5 Zn + K. 5. 1.0 Zn at conc. of (1.0 g L. water). 6. 1.0 Zn + K. 7. 1.5 Zn at conc. of (0.5 g L. water). 8. 1.5 Zn + K. Zinc spraying was adopted twice at the age of 35 and 65 days with conc. of 100 L D. each. Split- plot design was used. Treatments were spread as Randomized Complete Block Design (R.C.B.D.) with three replicates. Duncan's Multiple Range Test was used to compare means at probability levels of 5%. Results can be as fellows:-1. The best fertilizer combination for K and Zn, when K adopted into the soil at a rate of 30 Kg D. and Zn sprayed at a conc. of (1.0 and 1.5 g L. water). These combinations produced the highest values for vegetative growth studied parameters and productivity.2. Al- Somood cv. revealed the most effective in plant height and productivity, mean while, there were no significant effects for cvs. on plant leaf number. 3. The interaction between Al- Somood cv. And fertilization by K and spraying by Zn. at conc. of (1.0 g L.) produced the highest productivity (1745.0 and 2020.8 Kg D.) for the two seasons, respectively.