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Zhang, Jing, 2012. A study of root distribution and the effect of Heterobasidion spp. root infection on the growth of live Scots pines (Pinus sylvestris) in Southern Sweden. Second cycle, A2E. Alnarp: SLU, Southern Swedish Forest Research Centre

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Abstract

Stump treatment against Heterobasidion spp. root infection has not been commonly
conducted on Scots pine (Pinus sylvestris L.) plantations in Sweden. To assess whether
it should be, growth and volume losses caused by H. spp. was studied in a 36-year old
Scots pine stand in southern Sweden. A total of 24 Scots pine trees were extracted and
checked for H. spp. root infection, followed by a stem analysis reconstructing the
volume growth. Root morphology and location of infection were studied and different
above-ground indicators were tested to assess the incidence of infection. H. spp. were
detected on 87.5% of the studied trees and colonized 9.7% of root volume in average
(0.0-32.3%), which resulted in a growth reduction of 1.93 m3 per hectare in the latest
five years. Roots and infections were located unevenly in cardinal directions. Large
primary roots were most susceptible to infections. Needle retention, crown length,
DBH and presence of Heterobasidion fruiting bodies were not accurate enough as an
infection indicator. In conclusion, the root morphology and data of infection may be
used to calibrate some root disease models and it is recommended that stump treatment
on Scots pine is conducted to maintain the site productivity in southern Sweden.

Main title:A study of root distribution and the effect of Heterobasidion spp. root infection on the growth of live Scots pines (Pinus sylvestris) in Southern Sweden
Authors:Zhang, Jing
Supervisor:Rönnberg, Jonas and Wang, LiYing and Drobyshev, Igor
Examiner:Agestam, Eric
Series:Examensarbete / SLU, Institutionen för sydsvensk skogsvetenskap
Volume/Sequential designation:198
Year of Publication:2012
Level and depth descriptor:Second cycle, A2E
Student's programme affiliation:SM001 Euroforester - Master's Programme 120 HEC
Department:(S) > Southern Swedish Forest Research Centre
Keywords:Heterobasidion spp., Pinus sylvestris, stump treatment, forest management, root morphology
URN:NBN:urn:nbn:se:slu:epsilon-s-1851
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-s-1851
Subjects:Forestry production
Forest injuries and protection
Language:English
Deposited On:09 Nov 2012 08:36
Metadata Last Modified:09 Nov 2012 08:36

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