ISHS Acta Horticulturae 93: Symposium on Quality of Vegetables
SUBSTRACTIVE FERTILIZATION EXPERIMENT ON CARROTS (DAUCUS CAROTA L.) IN RELATION TO SOIL- AND LEAF ANALYSIS, YIELD AND QUALITY |
| Authors: | M. Vereecke, D. Ir. G. Boesman, D. Van Maercke, P.D.I. Cottenie |
| Abstract:
In 1972 a permanent field experiment using the substractive method was started at Afsnee in order to study the relation between fertilization, mineral composition of soil and leaves, yield and quality of vegetables. The experiment in 1977 was carried out with carrots. The different treatments had a slight influence on the mean weight per root, and no influence on the mean length per carrot root. Fertilization effects on beta- and alpha-carotene and xanthophyll concentration were not markedly apparent between the plots that were fertilized. However, the plot without fertilization showed a striking lower carotenoid content. The effect of the omission of one of the nutritive elements was generally striking in the results of the soil- and leaf analysis as well for the absolute contents as for the ratios of the individual nutritive elements. The plots without any fertilization showed a paler leaf colour. Other visual symptoms of deficiences were not observed. | |
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