Residual fertilizer nitrogen as influenced by timing and nitrogen forms in a silty clay soil under sugar cane in Mauritius
| MSI99P0208 | |
| Ng Kee Kwong, K. F. Deville, J. | |
| Residual fertilizer nitrogen as influenced by timing and nitrogen forms in a silty clay soil under sugar cane in Mauritius | |
| Periodical article | |
| 1987 | |
| Fert. Res. | |
| 14(3): 219-226 | |
| En | |
| En | |
| A field study was initiated to investigate the influence of application time on the disposition of 100 kg N/ha applied as 15 N-labelled NaNO3 and (NH4)2SO4 to a silty clay soil ( a ustic eutropept) under sugarcane (Saccharum hybrid sp.) in Mauritius. The results showed that the vertical and lateral distribution of residual fertilizer N remaining in the soil 2 years after fertilization was not influenced by the chemical nature of N used nor by the time of application. On account of rapid biological immobilization more than 50 per cent of the residual N in the soil remained in the surface 15-cm layer and less than 30 per cent of fertilizer N had moved laterally more than 30 cm away from the zone of fertilization. There was however more residual fertilizer N in the soil when the N was applied in September (23 kg N/ha) than in December (16 kg N/ha) because fertilizer N applied during the active sugarcane growth in December was used more efficiently than similar applications in September when growth was slow. The present study provides further evidence to substantiate that N leaching is not of significant concern in soils located in a tropical environment similar to that of Mauritius. | |
| SUGARCANE NITROGEN RECOVERY FERTILIZERS NITROGEN SOILS PLANT NUTRITION | |
| MAURITIUS | |
| Sugarcane: Soils and plant nutrition | |
| Fertilization: Nitrogen | |
| 1992-02-14 | |
| En | |
| Mauritius Sugar Industry Research Institute | |
| CHEM | |
| CAT | |
| 1 | |
| CHEM |