Nitrate versus chloride nutrition effects in a soil-plant system on the growth, nitrate accumulation, and nitrogen, potassium, sodium, calcium, and chloride content of carrot
1998
Inal, A. | Gunes, A. | Alpaslan, M. | Demir, K.
The experiment was conducted to evaluate the effects of various nitrate/chloride (NO3/Cl) ratios on growth, nitrate accumulation, and mineral absorption in carrot, Daucus carota L., plants in a controlled environment. The experiment included two Cl sources [potassium chloride (KCl) and calcium chloride (CaCl2)] and five NO3/Cl ratios at 100/0, 90/10, 80/20, 70/30, and 60/40 with total-nitrogen (N) concentration of 400 mg NO3 kg-1 soil in 100/0 treatment. Fresh and dry weights of shoots and storage roots, and length and diameter of storage roots increased significantly with mixed NO3/Cl treatments with both Cl sources as compared to single NO3 (100/0) treatment. Growth was enhanced up to the 80/20 NO3/Cl treatments. With Cl present in the treatments, the concentration of total-N unchanged and NO3 decreased in plants, and Cl and potassium (K) increased with the Cl sources. In KCl treatments, Na absorption decreased. Calcium (Ca) content of the plants significantly differed by the treatments. It was concluded that N fertilization provided with combined Cl forms and NO3/Cl rates can enhance production of better quality carrot and at the same time decrease of the N fertilizer input.
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