Agrarian
Bulletin
of the Urals

Russian Journal of Agricultural Research

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Registration certificate: PI number 77-12831 on May 31, 2002
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ISSN 1997 - 4868 (Print)

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ISSN 2307-0005 (Online)
Key title: Agrarnyj vestnik Urala (Online)
Abbreviated key title: Agrar. vestn. Urala (Online)

Аграрный вестник Урала № 07 (149) 2016

Биология и биотехнологии

Нагимов З. Я. доктор сельскохозяйственных наук, профессор Уральский государственный лесотехнический университет

Нагимов В. З. кандидат сельскохозяйственных наук, доцент Уральский государственный лесотехнический университет

Онучин И. Е. аспирант Уральский государственный лесотехнический университет

УДК:630*567

STANDARD VALUES OF STAND DENSITY AND STANDING VOLUME FOR CEDAR FOREST IN PLEUROCARPOUS MOSS FOREST TYPE

Correct definition of forest stand volume during forest surveying is of high importance. Main management arrangements inthe forest are planned and carried out on the basis of relative stand volume. For this reason forest stand value must be definedon the basis of certain criteria, which, in their turn, must be defined on the ground of local experimental material. The mainresearch objective was the development of forest stand density and standing volume standards for the pleurocarpous moss foresttype, the most popular forest type on the territory of Khanty-Mansiisk autonomous district. In order to define the highest forestdensity we used a method based on implementing extreme values of basal area sums found among the experimental material.The experimental material included the data of 86 permanent sample plots, put in stocks of productivity classes 3–5, aged from25 to 310 years. During our research the influence of productivity class on dependence of absolute density on the mean heightwithin the study group has not been observed. For this reason, a standard table, common for this group of forest types, wasdeveloped without including a criterion of differentiation in productivity class. While creating the table it was determined thatthe dependence of the basal area sum on the mean height of a forest stand can be best described by a second order polynomialequation, whereas the dependence of forest stand form height on the forest height is best described by a straight-line equation.The obtained equation statistics speak for their adequacy for the laws of nature. It was found out that in case of similar meanheights of stand forest the basal area sums from the standard tables, created for other regions, but implemented on the territoryof Khanty-Mansiisk autonomous district, are considerably higher than in our table. A consequence of the implementation ofthese standards can be both inaccurate forest stand productivity estimation and inaccurate prescription of forestry measures. Forthis reason preference while forest taxation should be given to the standards developed in our table, as these are characterizedby a relatively low density values. Low cedar forests productivity in the study area is well known and this characteristic mustbe taken into account during the development of standards, specifications and guidelines.


Keywords:

cedar forest stand, forest type, quality class, fullness of stands, stock of stands, average height, sampling area, density and forest yield standards, standard table.


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