Growth of half-sib progenies of European chestnut at the pole stand stage
2002
Tokar, F. | Bolvansky, M. (Slovak Academy of Sciences Zvolen, Nitra (Slovakia). Forest Ecology Inst.)
In the present paper, the performance of 54 half-sib progenies at 35 years of age was investigated. Progenies were derived from old chestnut trees grown at different sites in Slovakia. Each progeny was planted as one unreplicated block 20 x 30 m in size and with a tree spacing of 2 x 1 m. The field experiment was established at Castanetarium Lefantovce, 20 km north of the city of Nitra (48deg 27'N, 18deg 10'E). A high mortality rate caused by ink disease (Phytophtora spp.) resulted in a drastic decrease of basal area in most of the progenies in the last five years. Diameters at breast and stem heights were less influenced by mortality, while ranking of progenies by provenances in both of the above characteristics were similarly maintained in younger growth stages. Variation of growth characteristics was significantly influenced by progenies within provenances as well as between provenances. The present results will enable selection of parent trees and their progenies to produce seed for establishing highly productive chestnut plantations.
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