ISSN 2413-7642

 

 

R.V. Yakovenko, Candidate of Agricultural Sciences, Associate Professor

Uman National University of Horticulture

Uman, Ukraine

 

Effect of optimized fertilizer on leaf surface and yield of pear trees in repeated cultivation

 

The results of studies on the effect of optimized fertilization ofpear plantations of the varieties Conferentsia and Osnovianska on morphological changes of the leaf apparatus and the yield of trees grown on dark gray podzolic heavy loamy soil in the Right-Bank Forest-steppe of Ukraine are considered. Under the optimization of mineral nutrition of these pear varieties in the unirrigated plantation, in different age periods of growth and fruiting, a significant increase in the total leaf area, each leafplate and its thickness was observed on the plots of optimized background with the additional introduction of N30 and N30K30.

The highest yields of both research pear varieties in the period of fruiting and growth were also provided by additional nitrogen and nitrogen-potassium nutrition with appropriate fertilization on the optimized background. In these cases, there was a significant increase in tree yield compared to the unfertilized, and fertilized with annual application of N90P60K90, where there was a less balanced ratio of N:P:K in plant nutrition, although the total amount of fertilizer was greater.

Key words: pear, fertilizer, variety, leaves, harvest, growth periods

 

REFERENCES

  1. O.S. Bezuglova, V.F. Valkov (2010). Apple and pear trees: ecology, agrotechnics, processing, Rostov-on-Don.
  2. G.P. Chimpoesh, & G.S. Gobel (1982). Shaping the leaf surface of apple trees under the influence of variety, rootstock and plantation design. Intensification of horticulture. Kishinev, 68-72.
  3. R. Yakovenko, & P. Kopitko (2007). Indicators of growth and leaves of apple-tree depending on long-term fertilization of the orchard during re-growing in the orchard. Collection of scientific works of Uman State Agrarian University. Uman, 65, 247-252.
  4. Bosa, K., Jadczuk-Tobjasz, E., & Kalaji, M. H. (2016). Photosynthetic productivity of pear trees grown on different rootstocks. Annali Di Botanica, 6, 69–75. Retrieved from https://doi.org/10.4462/annbotrm-13172.
  5. V.V Zamorsky (2013) Structure and balance of apple-tree phytomass in intensive phytocenoses. Vestnik of Sumy NAU, 3 (25), 161-164.
  6. V.I. Dubrovsky (1999). Area location and composition of pigment complex of apple-tree leaves during tree pruning during vegetation. Horticulture, 48, 66-70.
  7. 7. K. Tanasyev (1985). Accumulation of nutrition elements in apple-tree organs under the influence of fertilizers. Modern problems of intensification of fruit farming. Proceedings of the Kishinev Agricultural Institute. Kishinev, 38-42.
  8. Y.H., Cheng, O., Arakawa, M., Kasal, & S., Sawada (2008) Analysis of reduced photosynthesis in the apple leaf under sink-limited conditions due to girdling, J. Japan. Soc. Hort. Sci, 77, 115-121.
  9. Pei G. Fan, Lian S. Li, Wei Duan, Wei D. Li, & Shao H. Li (2010) Photosynthesis of young apple trees in response to low sink demand under different air temperatures. Tree Physiology, 30, 313–325.
  10. Demirsoy Н. (2009). Leaf area estimation in some species of fruit tree by using models as a non-destructive method. Fruits, 64, 45-51.
  11. 11. Yu. (2005). Influence of garden type on the illumination of apple tree crowns, leaf area and chlorophyll content in them. Coll. of scientific papers of USAU, 1 (61), 613–621.
  12. 12. G.P. Chimpoesh, & V. Marin (1985). Formation of leaf surface area in low-growing apple-tree stands at different feeding areas and crown formation systems. Modern problems of fruitage intensification. Kishinev, 50-54.
  13. T.V. Malyuk (2010). Optimization of nitrogen nutrition of intensive pear plantations on vegetative rootstocks in irrigated conditions of southern Ukraine: Abstract of dissertation Candidate of Agricultural Sciences. Kharkiv.
  14. 14. V. V. Senin (1992). Promising winter varieties of pear for the south of Ukraine. Horticulture and Viticulture, 8, 20–22.
  15. P. Kopytko (2001). Fertilization of fruit and berry crops. High school.
  16. Counts, observations, analyzes, in experiments with fruit and berry plants: Method. recommendations / Edited by H.K. Karpenchuk and A.V. Melnyk. Uman. 1987. 115 p.
  17. P.V. Kondratenko, & M.O. Bublyk. (1996). Methods of conducting field research with fruit crops. Kyiv.
  18. V.O. Yeshchenko and others. (2014). Fundamentals of scientific research in agronomy. Vinnytsia.
  19. Egner H, Riehm H, & Domingo W.R. (1960). Untersuchungen uber die chemische Bodenanalyse als Grundlage fur die Beurteilung des Nährstoffzustandes der Böden. II. Chemische Extraktionsmethoden zur Phosphor- und Kaliumbestimmung. Kungliga Lantbrukshögskolans Annaler, 26, 199-215. (ГОСТ 26208.91)
  20. S.D. Cheban. (2005). Peculiarities of growth and fructification of apple-tree on rootstock MM106 in Right-bank forest-steppe of Ukraine depending on norm and methods of application of nitrogen fertilizers: Abstract of thesis of Candidate of Agricultural Sciences. Uman.

 



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