بررسي اثرات ميزان، منبع و روش مصرف كود روي بر صفات كمي و كيفي برنج زراعي رقم چرام

Effects of Rate, Source and Method of Zinc Fertilizer Application on Quantitative and Qualitative Characteristics of Rice (Choram 1)

Most of the soils of Kohgiluyeh va Boyerahmad Province are calcareous and hence micronutrient deficiency, especially zinc, is most frequently reported. In order to study the effect of source, amount and method of zinc application on rice (Choram 1 cultivar), a field experiment was carried out in Choram region, during two years. The experiment included eight different fertilizer treatments, consists of soil application (20 and 40 kg.ha-1), foliar spray (0.3 percent of ZnSO4) and root exposure to two percent of ZnO suspension. The experiment was designed in a completely randomized block (RCBD) with three replication. The results showed that in the first year, zinc application increased yield significantly (P<0.05). The maximum yield of 7508 kg/ha was obtained with combined application of 40 kg/ha of ZnSO4 plus foliar spray of 0.3 percent ZnSO4. In the second year, fertilizer application increased yield significantly (P<0.01). Compared to control treatment, combined application of 40 kg/ha of ZnSO4 and foliar spray of 0.3 percent ZnSO4 increased grain yield by 6366 kg/ha. The results showed that soil application of 40 kg.ha-1 of ZnSO4 plus foliar spray of 0.3 percent ZnSO4 increases the rice yield positively.