Fruit distribution within walnut tree canopy depending on light exposure
Keywords:
distribution of fruits; Juglans regia; light penetration; walnutAbstract
The trial was conducted with 15-year old experimental trees of ‘Izvor 10’ cultivar grafted on common walnut (Juglans regia L.) rootstock and planted at 10×10 m distance. The aim of the study was to establish fruit distribution in the separate parts of the walnut tree canopy depending on light exposure. It was established that fruiting was unevenly distributed within the walnut tree canopy. It was concluded that shading of separate parts of the tree canopy resulted in reduced yield only in the shaded parts, which indirectly proves the existing autonomy in the separate parts of the canopy and shoots, respectively. In walnut production practice it is recommended to conduct pruning after the formation of fruit fence.
References
Duncan, D.B., 1955. Multiple range and multiple F tests. Biometrics, 11(1), pp. 1-42.
Gandev, S., 2013. Walnut formation and pruning systems. Section of the monograph "Walnut", editor V. Dzuvinov, Biofruit BG Publishing House, Plovdiv
Gandev, S., 2014. Improving walnut production - propagation, variety study and cultivation. Dissertation for the award of the scientific degree "Doctor of Sciences", Plovdiv.
Hunter, D. M. and J.T. Proctor, 1986. The correlation of light interception with yield and fruit color of McIntosh apple strains. Fruit Var. J., 40, pp. 79-83.
Lampinen, B., S. Metcalf, V. Gamble, K. Mooreand and W. Reil, 2006. Shoot growth characteristics following mechanical hedging and high limb pruning in ‘Tulare’ walnut on two rootstocks at two spacings. Acta Horticul turae, 705, pp. 521-527.
Mendiburu, F., 2015. Statistical Procedures for Agricul tural Research. (https://cran.r-project.org/web/packages/ agricolae).
Olson, W., B. Lampinen, S. Metcalf, L. Waltonand and S. Miller, 2003. Comparisons between mechanical hedging treatments and the non-hedged check. In: Wal nut Research Reports-2003, Walnut Marketing Board, 1540 River Park Drive, 203, Sacramento, CA 95815, 171-179.
Petrov, A., M. Yoncheva, B. Milanov, I. Zhelev, 1979. Pruning of fruit plants. Hr. G. Danov, Plov div, pp. 82-83.
Steele, R. and J. Torrie, 1980. Principles and procedures of statistics. McGraw-Hill, New York, USA
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