The formation of productivity for hazelnut depending on the activity of photosynthesis

Abstract

The global trend is the rapid growth of hazelnut plantingareas, and there is a significant increase in the numberof people who directly include hazelnuts in their diet asa source of valuable nutritional elements, rather than consuming confectionery products. Purpose. The purposeof the research was to determine the most productiveand suitable varieties of hazelnuts in the conditions ofthe northern part of the Steppe of Ukraine - a zone withinsufficient capture and a sharply continental climate, whichwas previously considered not entirely suitable for thistype of activity. Methods: The research was carried out onproduction hazelnut plantations. The technology of growinghazelnuts in the experiment corresponded to the generallyaccepted for cultivation zones in Ukraine. Accounting forthe harvest of hazelnuts was carried out by continuousdivisional harvesting. Evaluation of photosynthetic activitywith the device and illumination of the crown was carriedout. Results. The Barcelona variety should not be grownin the conditions of the region. The definitely correctsolution is to use the variety Galle and, possibly, the varietyKosford in production plantations. The variety Catalonskyistill needs to be researched in this direction. Predominantefficiency belongs to the central part of the crown, whichis more promising with regard to future yield and is morerelated to this feature. The efficiency of use is a significantindicator that affects further productivity even at this levelof rather approximate research. Of great importance forthe formation of SPAD productivity and the ability to usethe light flow of the central part of the crown. All otherparameters were invalid. The first group included theless successful varieties Catalonskyi and Barcelonskyi,which did not differ significantly in the factor space, thevarieties Kosford and Galle stood out separately, it can beconsidered that these two genotypes are more promising,but there are significant differences in the formation ofproductivity by them and the features of the use of worldenergy and photosynthetic activity. Findings. The varietiesGalle and Kosford (especially the first) are promising forcultivation in the Northern Steppe zone in terms of thepossibilities of using global energy, the activity of the crownin the formation of the crop and the photosynthetic activityof the leaves. The ability to use the world's energy is clearlygenetically mediated and does not depend only on the waythe crown is cut.