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Varietal features of potassium nutrition of apple under foliar fertilization

Abstract

The influence of foliar spray applications on the potassium concentration in apple fruit and leaves of Imrus and Sinap Orlovsky was studied in the field experiment. During the vegetation period the applications were done five times according to the following scheme: 1) control (water treatment); 2) H3BO3 - 0,1 %; 3) K2SO4 - 0,3 %; 4) CaCl2 - 1 %; 5) H3BO3+K2SO4; 6) H3BO3+ CaCl2; 7) K2SO4.+CaCl2; 8) H3BO3+K2SO4+CaCl2. A signifi cant influence of foliar fertilization on the content of potassium in fruit fl esh and skin was observed. At the same time real differences by years and differences in the responses of studied varieties were observed. The concentration of potassium in fruit flesh of Imrus and in fruit skin of Sinap Orlovsky more changed under the influence of outside root applications of the fertilizers. The potassium content increase in Imrus fruit flesh was observed when treated by H3BO3, CaCl2 and K2SO4 as well as by H3BO3+K2SO4, while K2SO4+CaCl2 had a contrary effect in different years. K2SO4+CaCl2 and H3BO3+K2SO4+CaCl2 more effected the content of potassium in fruit flesh of Sinap Orlovsky. In the years of low fruit yields the skin of fruit contained reliably more potassium in those variants than in the control variant but in the years of high yields the potassium content was reliably less. The influence of outside root applications of the fertilizers on the content of potassium in leaves of Imrus was mainly noted in the years with poor yields. In 2011 the potassium content in Imrus leaves increased after H3BO3+K2SO4 and H3BO3+CaCl2 treatments while in 2013 it reliably decreased. The potassium concentration in the leaves of Sinap Orlovsky did not change much by years and in dependence on the variants of the experiment.

About the Authors

E. V. Leonicheva
All Russian Research Institute of Fruit Crop Breeding
Russian Federation


T. A. Roeva
All Russian Research Institute of Fruit Crop Breeding
Russian Federation


L. I. Leontieva
All Russian Research Institute of Fruit Crop Breeding
Russian Federation


O. A. Vetrova
All Russian Research Institute of Fruit Crop Breeding
Russian Federation


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Review

For citations:


Leonicheva E.V., Roeva T.A., Leontieva L.I., Vetrova O.A. Varietal features of potassium nutrition of apple under foliar fertilization. Horticulture and viticulture. 2015;(5):35-41. (In Russ.)

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ISSN 0235-2591 (Print)
ISSN 2618-9003 (Online)