Казаков, Л. А. Интродукция хвойных в Субарктику / Л. А. Казаков ; Рос. АН, Кол. науч. центр, Поляр.-альп. ботан. сад-ин-т. – Санкт-Петербург : Наука, 1993. - 145 с. : ил.

C O N C L U S IO N P la n t in tro d u c tion o f t r e e s and s h ru b s to the P a r N orth is c o n n e c t e d w ith o v e r c o m in g o f c o n s id e r a b le d iffic a lt ie s s tip u la te d e x tr em e c lim a tic fa c t o r s of in tro ­ d u c tio n 's d is tr ic t, s p e c i f ic fe a tu r e s o f s o i l 's c o n d itio n s and b io lo g ic a l c h a r a c t e r is t ic s o f in tr o d u c e d p lan ts . E s tim a tin g th e fir s t r e s u lt s o f in t r o d u c t iv e w o r k s it had b e e n e s t a b lis h e d that t r e e s p la n ts ' m ig ra tion is m ore d iffic a lt than s h ru b s '. A s a h o le , t r e e s ad ap t m o ­ r e s lo w ly than h e r b a c e o u s p lan ts a d a p t to u n fa v o u r a b le fa c t o r s o f e n v ir o nm en t (A v r o r in , 1 9 5 6 ). T h i s c o n c lu ­ s io n h a d b e e n c o r r o b o r a t e d b y N .M . A le x a n d r o v a and B .N . G o lo v k in ( 1 9 7 8 ) . T h e y s h o w e d in t r o d u c e d p o s s ib i­ lit ie s o f t r e e s w e r e in d is tin c tio n b e tw e e n p h e n o lo g ic a l in d ic a to r s . P la n t s o f lo n g p h e n o lo g ic a l c y c l e w e r e the le a s t w in te r r e s is t a n s in the P a r N o r th 's c o n d itio n s . P la n s o f sh o r t p h e n o lo g ic a l c y c l e w e r e the m ost r e s i s ­ tant. It is n o t ic e a b le p a r t ic u la r ly o f sh ru b s (K a c h u r i - na, 1 9 5 0 ). C o n ife r s a r e th e m ost a n c ie n t p la n ts o f s e e d p lan ts . T h is g r o u p h a s e x t e n s iv e r e p r e s e n t a t io n a ll o v e r the Ea rth , g r e a t e c o l o g i c a l am p litude a n d v a r ie t y of fo rm s . M a jo r it y c o n ife r s h a s a g r e a t n a tio n a l e c o n om ic im po— ta n c e a n d u s e in the fo r e s t r y a n d g r e e n bu ild in g . T h e r e is a g r e a t in t e r e s t in c o n i f e r s ' in trodu c tion e v e r y w h e r e . T h e s e w o r k s a r e c o n d u c t e d in a ll b o ta n i­ c a l g a r d e n s , b a r g e c o lle c t io n o f th e c o n ife r s h a v e b e e n c r e a t e d in M o s c o w , S t. P e t e r s b u r g and in the B a ltic c o u n t r ie s ' b o ta n ic a l g a r d e n s . T h e y a r e b a s is fo r a d ­ v a n c em e n t o f in t r o d u c e d p lan ts to the N o rth . A s a r e s u lt o f p r o lo n g e d in tr o d u c e d e x p e r im e n ts in the A r k h a n g e ls k r e g io n an d K a r e l ia n A u to n om o u s R e p u b lic t r e e s and sh ru b s h a v e b e e n t e s t e d . T h e r e e x o t s ' un iqu e na tu ra l o b je c t s h a v e b e e n c r e a t e d . C o n f e r s ' in c u lc a tio n to the P a r N o rth w a s c o n n e c t e d w ith th e in d u s tr ia l s e tt in g o f th is r e g io n . But the a p p e a - r e n c e o f s in g le p lan ts is e a r lie r . D i s c o v e r i e s o f s in g le t r e e s P in u s s ib ir ic a a n d L a r ix s ib ir ic a t e s t ifie d to p o s