Phosphate in the latosolic soils and latosols of Mauritius and its availability to plants. I. Relationships between phosphate retention and soil constituents
| MSI99P0659 | |
| Wong You Cheong, Y. Parish, D. H. | |
| Phosphate in the latosolic soils and latosols of Mauritius and its availability to plants. I. Relationships between phosphate retention and soil constituents | |
| Periodical article | |
| 1969 | |
| Proc. int. Soc. Sug. Cane Technol. | |
| 13, 733-745 | |
| En | |
| En | |
| Fifty-four Mauritian soils were used to study how phosphate retention is influenced by soil constituents such as extractable iron and aluminium, free iron oxide, clay content, organic matter and cation exchange capacity. The soils were from three zonal soil families (Low Humic Latosol, Humic Latosol and Humic Ferruginous Latosol) and two intrazonal families (Latosolic Reddish Prairie and Latosolic Brown Forest). Correlation coefficients between P retention and the levels of the constituents in the soils were determined. Free iron oxide gave the best correlation with phosphate retention insoils occurring under low rainfall (Latosolic Reddish Prairie and Low Humic Latosol). In the Latosolic Brown Forest and Humic Ferruginous Latosol families, which occur under higher rainfall, phosphate retention was highly correlated with extractable Fe and Al and cation exchange capacity, and in the case of the Latosolic Brown Forest, also with organic matter content. A highly significant inverse relationship was obtained between phosphate retention and free iron oxide in the Latosolic Brown Forest and Humic Ferruginous Latosol soils. The good relationship between free iron oxide and phosphate retention in the Latosolic Reddish Prairie and the Low Humic Latosol was due to the fact that the free iron oxide was in colloidal form, i.e. highly phosphate reactive, in these soils, whereas the poor relationship in the more weathered families was due to the iron oxide being in concretionary form. There was a highly significant overall relationship between P retention and extractable aluminium and iron. | |
| SOILS PHOSPHATES NUTRIENT CONTENTS SOIL FERTILITY SUGARCANE PLANT NUTRITION | |
| MAURITIUS | |
| Sugarcane: Soils and plant nutrition | |
| Fertilization: Phosphorus | |
| 1992-03-06 | |
| En | |
| Mauritius Sugar Industry Research Institute | |
| LIB | |
| CAT | |
| CHEM |