Current issue: 58(5)
Silva Fennica vol. 8 no. 1 | 1974
Category : Article
Forest research in the U.S.S.R. aims for increased productivity, improvements in timber quality and forest protection, and for better understanding of the environmental impacts of forests. Research institutes are organized under the U.S.S.R. Academy of Sciences, the State Committee of Forestry, the Forestry Committees of the Soviet Republics, or under some other institutions. Direct government subsidies as well as economic support from production enterprises are available as funding for these institutes. International cooperation in forest research, especially among the S.E.V. countries is strongly emphasized. As regards other countries, the well-established program for mutual exchange for forestry information and forest researchers with Finland should be mentioned.
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Mikhailov,
E-mail:
lm@mm.unknown
From the tree breeder’s point of view, an investigation of the chemical compounds in a tree population is worthwhile, if sufficiently high correlations exist between the chemical composition and any economical important characteristics. In Scots pine (Pinus sylvestris L.) populations, such a correlation seems to exist between a high α-pinene and a low Δ3-carene content on the one hand, and the poor resistance to Fomitopsis annosa Fr. (now Heterobasidion annosum (Fr.) Bref.) but a rapid development during the first half of the life cycle on the other hand. Detailed investigation on the terpene contents in pine populations were conducted at 121 locations throughout the Soviet Union. As a result, the range of this species was divided into zones, each of which was characterized by a distinct terpene composition pattern. In continuing selection and breeding work, the terpene contents are being used as indicators when the variation of economically important characteristics of Scots pine populations is studied.
The PDF includes a summary in English.
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Chudnyi,
E-mail:
ac@mm.unknown
In this literature review some error possibilities in the measurement of solid volume of logs and pulpwood are discussed. Although both underestimation and overestimation can occur for various reasons it seems likely that in the stereometric measurement method the real volume is underestimated, at least when Huber’s formula is applied, and the respective middle form factors are too low. Numerous results of empirical investigations are presented in the paper, too.
The PDF includes a summary in English.
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Kärkkäinen,
E-mail:
mk@mm.unknown
The possibilities of using results of coverage analyses for estimating the dry matter content of the ground vegetation has been examined in this study. The material covers 150 sample areas, 400 m2 large, which represent ground vegetation of Myrtillus type in the final succession stage. When the material was subjected to linear regression analysis, the amount of dry matter in the field and ground layer has been used as dependant variables and the results of the coverage analysis as the independent variable.
The study shows that it is possible to predict satisfactorily the dry matter content of the ground vegetation by grouping the coverage, according to the coverage weight, into parts of equal size and the using them as independent explaining variables. In particular, the value of the prediction equation for the dry matter content of the field layer could be improved by using the height and density characteristics of the vegetation as explaining variables in addition to the coverage figures. Thus, slightly over 80% of the total variation of the dry matter content of the field layer could be predicted. In the case of the ground layer vegetation, the explaining power rose slightly above 70%.
The PDF includes a summary in English.
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Kellomäki,
E-mail:
sk@mm.unknown
By the last times of the Roman Empire, a considerable part of the vast forest and wilderness areas of the northern provinces had come into the possession of the Emperor and other owners of large land areas. Such areas were called saltus. The kings of the Franks considered all inhabited lands as belonging to the crown, but contrary to the Roman Emperors, they reserved the right of hunting and fishing in these areas for themselves. As the concept saltus did not originally include a prohibition against outsiders’ right to hunt and fish, and as among the people saltus still meant forest-covered wilderness in general, a new term was needed for description of uninhabited areas belonging to the king including all rights of using them. The introduced term was forestis, a word the origin of which has been a subject of much contention. In the present writer’s opinon, the most probable solution is that the word forestis has been derived from the Latin foris (outside of; e.g. outside of inhabited areas or of free utilization) by means of the suffix -estis. This is against the rules of Classic Latin, but it is completely possible in the case of the Latin of the seventh century.
The PDF includes a summary in English.
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Makkonen,
E-mail:
om@mm.unknown
The purpose of the study was to find out whether Fomes annosus (now Heterobasidion annosum) growing in a Norway spruce (Picea abies (L.) H. Karst.) stump can, with its mycelium, take up the radioactive isotopes 3H, 33P and 125I in the heading, and whether it transfers them via the sporophores in situ to its basidiospores. Wood material in close proximity to active sporophores was injected with radioactive isotopes. All isotopes could be verified from the basidiospores. The production of viable basidiospores by sporophore was reduced by the isotope injections. This latter result may be of importance e.g. in meteorology for observation of the movements of air masses.
The PDF includes a summary in English.
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Kallio,
E-mail:
tk@mm.unknown
- Selander, E-mail: js@mm.unknown
- Uusi-Rauva, E-mail: au@mm.unknown
