Abstract
The experiment was established in Warsaw-Wilanów in 2001. Jonagored apple trees on P 16 and P 22 rootstock planted in spring 1996, spaced 3.5 x 1.2 m were used. No differences in leaf N concentration were found in 2002 and 2003. Neither different N treatments or mode of N application had any marked effect on yield value or vegetative growth of trees. No significant response to autumn N feretilization was noted on fruit set and mean fruit weight either. Growth of trees and cropping depended on rootstock. Trees on P 22 showed a less vigorous growth, and yield per tree was lower in comparison with trees on P 16.
References
Bläsing R., Atkinson D., Clayton-Green K., 1990. The contribution of roots and reserves to tree nutrient demands: implication for the interpretation of analytical data. Acta Hort. 274, 51–69.
Failla O., Stringari G., Mescalchin E., Agnolin C., 1990. Apple and grapevine leaf analysis in advisory work in Trentino district. Acta Hort. 13 (1), 15–25.
Link H. 1996. Criticalview on usage of foliar fertilizer in fruit growing. International seminar “Ecological aspects of nutrition and alternatives for herbicides in horticulture” (Warszawa, June 10–15.1997) 43–44.
Łoginow W., Janowiak J., Spychaj-Fabisiak E., 1987. Zmieność ogólnej zawartości poszczególnych form azotu w glebie. Zesz. Nauk. ATR Bydg., Rol. 23, 13–24.
Mochecki J., Kłosowski W., Piątkowski M., 1987. Efekty nawożenia sadu jabłoniowego w pełni owocowania. Pr. Inst. Sad. A27, 39–46.
Olszewski T., 1999. Efektywność nawożenia dolistnego nawozami wieloskładnikowymi na tle nawożenia doglebowego oraz jego wpływ na wielkość i jakość plonu. I Ogólnopolskie Sympozjum Mineralnego Odżywiania Roślin Sadowniczych (Skierniewice, 1–2.12.1998) 142–151.
Pacholak E., 1990. Nawożenie i nawadnianie w intensywnym sadzie jabłoniowym a wzrost i plonowanie odmiany James Grive. Prace Komisji Nauk Roln. i Leśnych PTPN 69, 87–100.
Sadowski A., 1974. Wpływ nawożenia pozakorzeniowego na ograniczenie występowania gorzkiej plamistości podskórnej jabłek. Zesz. Prob. Post. Nauk Roln. 143, 319–325.
Scholz K. P., Helm H. U., 2000. N-nutrition of apple. Part 1. Principles of N-supply. Erwerbsobstbau 42, 6, 192–200.
Świetlik D., Faust M., 1984. Foliar nutrition of fruit drops. Hort. Rev. 6, 287–350.
Vang-Peterson O., Poulsen E., Hansen P., 1973. The nutritional state of Danish fruit orchards as shown by leaf analysis. Tidsskr. Planteavl 77, 37–47.
Wrona D., Sadowski A., 1999. Efekty nawożenia jabłoni azotem w pierwszych czterech latach po posadzeniu. I Ogólnopolskie Sympozjum Mineralnego Odżywiania Roślin Sadowniczych (Skierniewice, 1–2.12.1998) 115–127.
Wrona D., Kot C., 2002. Cropping and fruit quality of ‘Šampion’ apple trees on M.9, depending on N fertilisation. Scientific works of the Lithuanian Institute of Horticulture and Lithuanian University of Agriculture, Horticulture and vegetable growing 21(3), 120–125.
Yogaratnam N., Greenham W. P., 1982. The application of foliar sprays containing nitrogen, magnesium, zink and boron to apple trees. Effects on fruit set and cropping. J. Hort. Sci. 57(2), 151–158.
Ystaas J., FrÆynes O., 1993. The fertilizer requirement of young apple trees as affected by restricting the fertiliser placement to the herbicide strip. Acta Hort. 347, 179–188.
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