| Revista: | Scientia agricola |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000283775 |
| ISSN: | 0103-9016 |
| Autores: | Trivelin, P.C.O1 Lara Cabezas, W.A.R Victoria, R.L Reichardt, K |
| Instituciones: | 1Universidade de Sao Paulo, Centro de Energia Nuclear na Agricultura, Piracicaba, Sao Paulo. Brasil |
| Año: | 1994 |
| Volumen: | 51 |
| Número: | 2 |
| Paginación: | 226-234 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, analítico |
| Resumen en inglés | Two experiments were conducted on commercial sugar cane fields cropped with the variety SP70-1143, with the objective of evaluating a single row microplot design to determine plant recovery of 15N fertilizer nitrogen. One of them used 15N-aqua ammonia and 15N-urea applied to two linear meter microplots of a ratoon crop (four replicates). The second used one linear meter microplots (three replicates) which received 15N-aqua ammonia only. The fertilizers were applied on 15cm deep furrows, located 25cm from both sides of the cane row. One linear meter of ratoon cane, inside and outside of the microplot, and on the same and adjacent rows were harvested twelve months after fertilization. The results indicate the feasibility of using single row segments of ratoon cane with 15N-fertilizer. The main advantage of this microplot design, when compared to the classical 3 contiguous row segments, is that only one third of the labeled fertilizer is needed. In a single row, in order to separate the nitrogen taken up by plants from the fertilizer applied to the row (Nr dff r), from that applied to adjacent rows (Nr dff r+1, and Nr dff r-1), the following should be considered: (a) a border segment of 0.5 to 1.0m inside the plot, so that Ndff results from plants harvested in the center of the microplot represent the actual value of fertilizer nitrogen taken up from that applied to the same row, and (b) harvest of plants from adjacent rows at equivalent positions to those sampled inside the microplot, to quantify the 15N-fertilizer uptake by outside |
| Disciplinas: | Agrociencias |
| Palabras clave: | Fertilización, Gramíneas, Nitrógeno, Caña de azúcar, Parcela experimental, Recuperación |
| Keyword: | Agricultural sciences, Fertilization, Gramineae, Nitrogen, Sugar cane, Experimental plot |
| Texto completo: | Texto completo (Ver HTML) |
