A comparative analysis of different vegetable crops for content of manganese and molybdenum
¹Agricultural University – Plovdiv12, Mendeleev Str., 4000 Plovdiv, Bulgaria;e-mail: email@example.com
²Vegetable Crops Research Institute, Plovdiv, Bulgaria
The microelements manganese and molybdenum are actively absorbed by plants. The manganese and molybdenum content in 12 widely used vegetable species of the families Fabaceae, Malvaceae, Brassicaceae, Cruciferae were studied to establish the different levels of these elements in their production.Under the influence of nitrogen fertilization (400 mg N / 1000 g soil), different plantspecies, grown under the same soil-climatic conditions, accumulate different quantities of manganese and molybdenum from the nutrient medium. The resulting content varies considerably.Lentils are described with the highest content of manganese, 120.83 mg kg-1 dry matter(family Fabaceae). The concentration of molybdenum is highest in broccoli, 29.53 mg kg-1 dry matter (family Brassicaceae). Brussels sprouts and okra accumulate the least manganese and molybdenum – brussels sprouts, 5.50 mg kg-1 Мn dry matter, оkra, 5.23 mg kg-1 Мо dry matter.The manganese and molybdenum content in the vegetable species were determined by anew extraction-photometric method with Toluidine Blue and Tetrazolium Violet.Manganese and molybdenum has also been determined by atomic-absorption method, inorder to compare the results.