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Ecological features of the introduced black walnut (Juglans nigra L.) In forest plant communities of the Middle and Lower Dniester

Author: Chiciuc Natalia
Degree:doctor of biology
Speciality: 03.00.16 - Ecology
Scientific adviser: Petru Cuza
doctor habilitat, associate professor (docent), Moldova State University
Scientific consultant: Ion Dediu
doctor habilitat, professor, Institute of Ecology and Geografy of the ASM
Institution: Institute of Ecology and Geografy of the ASM


The thesis was presented on the 6 October, 2017
Approved by NCAA on the 11 May, 2018


Adobe PDF document0.85 Mb / in romanian


CZU 634.512:504.75(478)(043.2)

Adobe PDF document 3.72 Mb / in russian
123 pages


black walnut, introduced plant, leaf mass, preparing seeds for sowing, soil conditions, planting density, productivity, environmental reconstruction


Structure of the thesis: introduction, 4 chapters, conclusions, recommendations, production, bibliography of 153 titles, 123 pages of main text, 16 figures, 28 tables, 8 pictures. The results are published in 19 scientific papers.

Field of study: Ecology.

Objective: Identification of biological and ecological characteristics of plants of black walnut (Juglans nigra L.) with a view to evidence-based introduction and development of technological approaches for optimization of forest management in forest plant communities of the Middle and Lower Dniester River.

Objectives: to identify environmental features black walnut plants under different climatic conditions the space of research; identify the effect of the method of preparation of fruits of black walnut for sowing on germination; study the effect of ambient light and soil conditions on plant growth characteristics walnut black; explore the feasibility of using black walnut plants in the reconstruction of unsatisfactory as plantations and acacia composition; evaluate the effect of planting density on plant growth in black walnut mixed with a variety of tree species; to conduct a comparative description of the growth and productivity of walnut wood plants black, English oak and walnut.

Scientific novelty: The estimation of the influence of ambient light, soil conditions, planting density and climatic conditions on the growth and development of black walnut plants in the study area. The expediency of introduction of black walnut for reconstruction unsatisfactory as the composition of plantations of white acacia, by environmentally optimal technologies with preservation of the natural forest environment.

The scientific problem is to identify the biological and ecological characteristics of black walnut for the development of theoretical and practical approaches to the introduction and cultivation of high-yield plantations in forest plant communities of the Middle and Lower Dniester River.

The theoretical value. It is proved that the introduction of black walnut is a consequence of the biological (growth speed, the quality of the wood) and environmental (the suitability of the soil conditions, the endurance to temporary flooding of the floodplain) features, as well as the value of the wood and the high productivity of its plantations. In this connection, it established the superiority of black walnut plantations for biological productivity in comparison with walnut plantations and indigenous tree species English oak.

Applied value of the work. For forestry, the research area is defined as the most successful way of drying black walnut seeds with a pericarp, giving the maximum percentage of germination. For the introduction of black walnut in the forest phytocenoses of the Middle and Lower Dniester, favorable growth conditions have been determined for the formation of ecologically sustainable and productive forest plantations. For the reconstruction of unsatisfactory acacia white plantations, a method is used with the maximum use of the natural forest environment of the parent plantation, which ensures environmental sustainability and economic feasibility.

Implementation of scientific results. For introduction into production made up „Guidelines for Reconstruction and unsatisfactory as the composition of plantations in forest plant communities of the Middle and Lower Dniester River with black walnut”. The obtained results are used in the learning process of students in Soltys polytechnic college in Kamenka for faculty „Forestry and green building”.