Effect of directly-applied and residual boron on nutrition in French bean-cabbage cropping sequence under Alfisol
No hay miniatura disponible
Fecha
Autores
Título de la revista
ISSN de la revista
Título del volumen
Editor
Society for Promotion of Horticulture
Resumen
Descripción
Effects of directly-applied-to-the-soil and residual boron (B) in soil were assessed in French bean (Phaseolus vulgaris L.) - cabbage (Brassica oleracea var. capitata L.) cropping sequence and cycle under Alfisol, with either low or adequate hot-water-soluble boron (HWS-B) content. The experiments focussed on effects of various levels of applied B on leaf tissue B and crop yield, HWS-B content in the year of B application, and in subsequent years. Response of the crops to applied B reflected initial soil B levels. Application of the highest level of B (8kg ha-1) reduced crop yield at Site-I throughout the four years of experimentation. Applied B up to 2kg ha-1enhanced French bean yields at Site I, while at Site II, at all the levels of applied B, yields were reduced in the first two crops; during the third and fourth crop, yields in plots receiving 1kg B ha-1 were higher than those in plots that did not receive supplemental B. In both French bean and cabbage, high B concentrations caused toxicity symptoms manifested as browning of leaf margin. These symptoms appeared in both French bean and cabbage under all the plots receiving B e” 4kg ha-1. Monitoring HWS-B content at harvest in each crop during the experiment indicated that applied B diminished rapidly in these soils. However, at Site II, residual HWS-B was above the critical level throughout the period of experimentation. A single application of higher amounts of B fertilizer led to B toxicity and caused yield suppression in these vegetables. French bean, being a sensitive crop, should be grown preferably on residual B rather than subjecting it to direct application of B in any vegetable cropping system under red soils.
Palabras clave
Agrociencias