Nguyễn Đăng Nghĩa (trang 61-68)
Từ khoá: hiệu lực, khả năng, cố định, photpho, đất phèn, Đồng Tháp Mười
Summary
The efficiency and the fixing ability of phosphorus in acid sulphate soils of Dong Thap Muoi
3 kinds of acid sulphate soil (strong, moderate and light). Phosphorous fixing ability is highly in acid sulphate soils, and increased depending on the level of sulphate salt in the soil. Recommendation: 40-60 kg P2O5/ha in winter-spring season, 60-80 kg P2O5/ha in summer-autumn season for light and moderate acid sulphate soil, for other 120-180 kg P2O5/ha.