Zinc (Zn) deficiency is a serious problem in crop production and nutritional quality for humans worldwide. In addition, low seed Zn concentration may also affect germination, seedling growth and establishment and subsequent crop growth and yield (Cakmak, 2008; Rengel and Graham, 1995). With rice grown by farmers in the Vientiane Plain of Lao PDR and popular and improved Thai varieties grown together at Chiang Mai, Thailand, it is shown that Zn content of rice that people consume can indeed be quite low. Potential for boosting Zn intake of rice eaters is shown by the existence of genotypes with exceptionally high grain Zn in a local landrace rice and effectiveness of foliar Zn application in raising Zn concentration of white rice, the form most commonly consumed, as well as whole grain rice.
Phattarakul, N.; Mongon, J.; Rerkasem, B. Variation in Rice Grain Zinc and their Response to Zinc Fertilizer. Presented at 3rd International Zinc Symposium on ‘Improving Crop Production and Human Health’, Hyderabad, India, 10-14 October 2011. (2011) 2 pp.