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Порослевое возобновление березы в лесостепной зоне Курганской области

Порослевое возобновление березы в лесостепной зоне Курганской области

Abstract

The indices of natural birch renewal in forest steppe zone of Kurgan region has been and lysed. Of is pointed out that the birch is the main species in the investigated region and the share it is dominated in composition of forest stands constitutes 82,2 % of the whole area covered forest vegetation. The prevailing group of forest type is «the birch on salty soils», it occupies 90 % of birch stands area. As concerns moisture contonts, most soils constitute 55 %, the fresh ones constitute 34 %, damp and wet – 11 %. The data of 16 sample plots laid on the 1–4 year-old cuttings, in birch stands, on salty soils fresh and moist testi by the fact that the share of vegetative renewal on stumps depends on forest stands age. This dependence is especially evident on fresh salty soils. On cuttings in the above mentioned forest types stamps number with sprouts is varied from 44 to 77 %. An such a case after cutting off stands of more than 70 year old the number of stumps with sprouts do not exceed 46 % but at the same time when stands of less than 60-year old are cut down the number of stamps with sprouts constitutes 65–77 %. On birch stands on moisf soils clear dependend of stump number with sprocits on stand age has not been estabeished. However there has not been observed the tendency for maximum number of stumps with sprouts under trees cutting at age of 60. The data received can be used in determing the age of ripeness. Проанализированы показатели естественного возобновления березы в условиях лесостепной зоны Курганской области. Отмечается, что береза в районе исследований является главной породой и на насаждения с доминированием ее в составе древостоев приходится 82,2 % покрытой лесной растительностью площади. Преобладающей группой типов леса является береза на солодях, занимающая 90 % площади березняков. По влажности доминируют влажные почвы 55 %, на долю свежих приходится 34 %, сырых и мокрых – 11 %. Материалы 16 пробных площадей, заложенных на вырубках 1–4-летней давности, в березняках на солодях свежих и солодях влажных, свидетельствуют, что доля вегетативного возобновления на пнях зависит от возраста древостоя. Особенно четко данная зависимость прослеживается в березняках на солодях свежих. На вырубках в данном типе леса количество пней с порослью варьируется от 44 до 77 %. При этом после вырубки древостоев старше 70 лет количество пней с порослью не превышает 46 %, в то время какпри возрасте вырубаемых деревьев моложе 60 лет количество пней с порослью составляет 65–77 %. В березняках на солодях влажных четкой зависимости количества пней с порослью от возраста древостоя не установлено. Однако прослеживается тенденция максимального количества пней с порослью при рубке деревьев в 60 лет. Полученные данные могут быть использованы при установлении возраста спелости.

Country
Russian Federation
Related Organizations
Keywords

CLEAR CUTTING, БЕРЕЗНЯКИ, ВЕГЕТАТИВНОЕ ВОЗОБНОВЛЕНИЕ, BIRCH STANDS, ЛЕСОСТЕПНАЯ ЗОНА, SPROUT RENEWAL, ПОРОСЛЕВИНЫ, FOREST STOPE ZONE, СПЛОШНОЛЕСОСЕЧНАЯ РУБКА

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green