Tạp chí
Nguyễn Đức Thuận, Oliver Husson, Mai Thành Phụng (trang 39-42)
Từ khoá: ảnh hưởng, địa hình, độc chất, năng suất, lúa, đất phèn, Đồng Tháp Mười
Summary
Effect of topography on soil toxicity and rice yield on a newly reclaimed severe acid sulfate soil I the plain of reeds (POR)
There is a closed relationship among topography, soil toxicity and rice yield. Highest yield can get from medium fields in topography. Fields with high topography can raise high aluminum concentration but low fields suffer from extreme reduce condition, high iron concentration and high organic matter content. Improvement by drainage is not possible because of their very low topographical level and their very high permeability. These low fields present tremendous constraints for rice growth. Recommend: reclaim land with medium and high topographical level in priority. Reclamation of low fields is difficult and low in economic return.
