Variability of Siberian Stone Pine Cone Production under Conditions of Introduction

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UDС

630*631.53.01

DOI:

10.17238/issn0536-1036.2018.3.84

Abstract

The formation of cone crops of Siberian stone pine (having nutritional value) predetermines the expediency of its introduction. The variability of the seed productivity of Siberian stonepine is expressed at the geographical and individual levels, as well as due to external factors, such as the heterogeneity of weather conditions over the years of crop generation. The goal of research was to reveal the individual variability of Siberian stone pinecone produc-tion under the conditions of introduction. The observations of seeding were carried out in the Chagrinskaya cedar grove located in the Gryazovets district of the Vologda re-gion. To estimate the cone crop of model trees (selected proportionally to the diameter class of their trunks) the authors counted the number of cones in the tree crown using the binoculars. Seed-bearing trees of Siberian stone pine annually produce on the studied object at the average from 131 to 214 cones. The studies have shown the significant impact (F_ф = 7.09 > F₀₅ = 1.94) of individual variability of trees on the cone crop, which depends on this parameter by 63 %. The variability of cone crop by the years of observations (η² = 0.10) caused by weather conditions during the period of formation, growth and maturation of macro cones (F_ф = 5.18 > F₀₅ = 2.83) is much less expressed. Separate biotypes of Siberian stone pine are distinguished by high and stable yield of cones over the years. The number of cones is mostly affected (r = –0.75 ± 0.11) by the crown form coefficient (the ratio of its width to the length). The authors recommend considering this index as a correlative feature for carrying out a breeding work on the selection of high-yielding biotypes.

Authors

R.S. Khamitov¹, Doctor of Agricultural Sciences, Associate Professor
M.A. Andronova², Candidate of Engineering Sciences, Associate Professor
A.M. Antonov³, Candidate of Agricultural Sciences, Associate Professor

Affiliation

¹Vologda State Dairy Farming Academy named after N.V. Vereshchagin, ul. Shmidta, 2, Molochnoe, Vologda, 160555, Russian Federation; e-mail: r.s.khamitov@mail.ru
²Vologda Institute of Law and Economics of the Federal Penitentiary Service of Russia, ul. Shchetinina, 2A, Vologda, 160026, Russian Federation; е-mail: mary1969@yandex.ru
³Northern (Arctic) Federal University named after M.V. Lomonosov, Naberezhnaya Severnoy Dviny, 17, Arkhangelsk, 163002, Russian Federation; е-mail: a.antonov@narfu.ru

Keywords

Siberian stone pine, introduction, variability, selection, cone

For citation

Khamitov R.S., Andronova M.A., Antonov A.M. Variability of Siberian Stone Pine Cone Production under Conditions of Introduction. Lesnoy zhurnal [Forestry journal], 2018, no. 3, pp. 84–91. DOI: 10.17238/issn0536-1036.2018.3.84

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Received on December 21, 2017