Monica Negrea, Isidora Radulov, Lavinia  Ardelean,  Laura-Cristina Rusu<br>Mineral Nutrients Compositions of Daucus Carrota Culture, <br>in Different Stages of Morphogenesis

Monica Negrea, Isidora Radulov, Lavinia Ardelean, Laura-Cristina Rusu
Mineral Nutrients Compositions of Daucus Carrota Culture,
in Different Stages of Morphogenesis

Abstract:

This study was designed to determine the optimum fertilisers rates required for quality (Nt, P, K, Mg, Fe, Cu, Mn, Zn) of Daucus Carrota culture, in different stages of development. Field trials were conducted during the early seasons of 2011, on a black Chernozem soil. The experiment was a randomized complete block design with four replications. The experimental site was cleared and 28 beds of 1 x 1 m2 each in sizes were prepared manually. The primary (macro) nutrients K, P, Mg and micronutrients (Fe, Cu, Zn and Mn) were determined by AAS method and Nt content (%) was determined with the help of Kjeldahl unit. Most of the mineral nutrients of analysed carrot samples, were significantly influenced by the sole application of NPK fertilizers rates and growth regulators (Aqzyme and Pervaide). To mature plants, the more the root system is stronger, with a greater capacity of absorption and exploit a larger volume of soil, the lower are requirements for soil nutrients and vice versa. Copper (Cu) content reveals a deficiency compared to the normal level, in variants v6 and v7. Highest Zn content was accumulated in variant with low NPK fertilization and in presence of Aqzyme. In all morphogenesis stages, the iron content of carrots decreases as the NPK fertilizers dose increases. Keywords: macronutrients, micronutrients, Daucus carrota, fertilizers

Issue: 2012, Volume 63, Issue 9

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