A Crop and Environmental Sciences Division Seminar
By Francis Hennel Rubianes
Crop and Environmental Sciences Division
Tuesday, 18 June 2013
Room A, D.L. Umali Laboratory, IRRI
Abstract: Most of the studies about Zinc fertilizer in rice were about Zinc deficiency; however limited studies were done about Zinc biofortification. Two greenhouse experiments were conducted to determine the effect of Zinc fertilizer application and water management during vegetative and reproductive stage on Zinc plant uptake and grain Zinc concentration of a genetically diverse set of Zinc biofortification rice breeding lines. Six genotypes were grown to maturity for both the experiments. Soil and plant samples were collected at several stages to determine the changes in soil Zinc concentrations and Zinc plant uptake. Results showed that some genotypes significantly increased their total Zinc plant uptake after Zinc fertilizer application. Alternate wetting and drying also increased the total Zinc plant uptake of some genotypes. However, grain Zinc concentration did not significantly increase for most of the genotypes.
The study shows when is the best time to apply Zinc fertilizer and the importance of terminal drying in increasing Zinc plant uptake and grain Zinc concentration.