[Fructification parameters of blueberry by optimization of mineral supply in Belarus]
2005
Pyatnitsa, F.S. | Rupasova, Zh.A. | Ruban, N.N. | Yakovlev, A.P. | Pavlovskij, N.B. | Stepanyuk, M.L.(The National Academy of Sciences, Minsk (Belarus). Central Botanical Garden)
For the first time the results of comparative investigations of productivity of generative sphere of three species of blueberry - early-, media- and late-ripening are given within the framework of field experiments with the 8-variant scheme of N60, P60, K60 application in southern and central agroclimatic regions of Belarus during a 4-yaer cycle of observations. It is shown, that on the background of annual fructification in southern agroclimatic area its frequency in the central area is defined by the rate of temperature contrasts in early autumn and late spring frosts, as well as in winter. Species and regional variations of productivity values and morphometrical charachteristics of fetuses of the blueberry when adding mineral fertilizers are determined. The most efficient experiments have been defined providing in the southern area of research an increase of crop of baccas in comparison with the control site of the order 50…58%, at early-ripe - from 75 up to 89%; in the central district - from 90…140% - at early-ripe and 145…286% - at media-ripe to 119…316% - at late-ripening kinds. In the central district of research positive reaction of all species of blueberry to application of the mineral fertilizers was marked which was due to by low level of natural fertility of bedrocks and increased in series from early-ripening to late-ripening species. Thus in both areas of research, the absence of positive effect or drop of productivity of blueberry was marked when adding only potassium fertilizer
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