Improving Grain Zinc Concentration in Wetland and Upland Rice Varieties Grown under Waterlogged and Well-Drained Soils by Applying Zinc Fertilizer

The objective of this study was to evaluate the responses in grain yield and zinc concentration wetland upland rice varieties Zn fertilizer application different growing conditions. (Chainat 1; CNT1) (Kum Hom CMU; KH CMU) were grown under waterlogged well-drained soil conditions with or without application. Zinc (ZnSO4) applied at 0 60 kg ha−1 three stages tillering, booting, flowering. In variety, CNT1, decreased by 18.0% compared conditions, but there an 8.9% decrease CMU. Applying affected yields differently between varieties, decreasing 11.9% CNT1 while having no effect For concentrations brown rice, applying increased 16.5–23.1% CMU both soil, straw 51.6% 43.4% These results indicated that responded when appropriate variety would help farmers improve desirable rice.