Impact of risk factor management on the sanitary condition of Norway spruce (Picea abies [L.] Karst.) pure stands in Latvia

Ruba, Jelena; Miezīte, Olga; Luguza, Solveiga

doi:10.17221/4/2014-jfs

Cited by 4 publications

(4 citation statements)

References 8 publications

(8 reference statements)

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“…The most commonly observed stands damage caused by hoofed animals was stem bark scratches and broken tree branches. Evaluating ungulates risk factors, the study conducted showed that ungulates killed more formations located near the clearing, but among adults stands damage was less, which coincides with previous studies (Ruba and Miezīte, 2014).…”

Section: Impact Of Young Forest Stand Density and Health Status On Hesupporting

confidence: 87%

Height Increment of Naturally Regenerated Young Forest Stands of Scots Pine Pinus Sylvestris L. In Myrtillosa Forest Site Type

Miezīte

Eglīte

Luguza

et al. 2015

Proceedings of the 7th International Scientific Conference Rural Development 2015

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One of the most important stand productivity and competition indicators is height annual increment, which is affected by various factors such as soil preparation, initial density as well as various management risk factors. Empirical material for the research was collected in the northern part of Latvia. In four pure Scots pine stands in Myrtillosa forest site type 29 circular plots tree diameter, height and the last five years annual height increment was measured and visual state of health was described. The aim of this research is to analyse Scots pine height annual increment in naturally regenerated young forest stands in Myrtillosa site type forest stands and to give an evaluation of the impact of the initial stand density and the health status on height growth. The mean height increment in studied stands is 0.26 ± 0.009 m and the average periodical increment is 0.37 ± 0.042 m. The annual height increment has been in the height range from 0.23 to 0.53 m. Initial stand density affects the annual height increment significantly. In the stand with an initial density of 5770 ± 961 trees the height increment during the last five years has risen by 36%, but in stand with initial density of 12,650 ± 1,581 trees (P = 51.8 % and R = 6.0 %) the height increment during the five-years period has increased by only 12 %. The tree health status does not affect the tree height increment significantly.

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Section: Impact Of Young Forest Stand Density and Health Status On Hesupporting

confidence: 87%

Height Increment of Naturally Regenerated Young Forest Stands of Scots Pine Pinus Sylvestris L. In Myrtillosa Forest Site Type

Miezīte

Eglīte

Luguza

et al. 2015

Proceedings of the 7th International Scientific Conference Rural Development 2015

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“…and anthropocentric one. An essential role for the carrying out of these fellings is damage caused by cervids game whose impact is essential (Rūba, Miezīte, & Luguza, 2014;Šņepsts et al, 2018), and wind resulting in significant natural disturbances (Donis et al, 2020;Snepsts et al, 2020;.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of productivity and costs of Malwa forest machine in sanitary fellings in Latvia

Zimelis¹,

Kaleja²,

Ariko³

2020

Research for Rural Development

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The topicality of the study is determined by the increasing demand for sanitary felling services currently mainly provided by manual work. Harvesting using hand-held motor instruments is a physically hard work whose costs are increasing rapidly, but labor availability is declining. In sanitary cuttings, additional complications are caused by the use of conventional machinery in harvesting, which necessitates the creation of wide (4 m) technological corridors and significantly increases the proportion of damaged remaining trees in a stand (according to past studies, a set of middle-class forest machines in thinning of spruce stands results in 4–5% of damaged trees, but in pine stands – in approximately twice less damaged trees than in spruce stands). The compact class forest machines in thinnings result in mechanical damage to not more than 1% of remaining trees. During field trials in sanitary felling 9329 trees were felled. The average productivity working in one shift is 5.35 m3 h-1 with average stands 10 cm. The cost of harvester’s productive hour is 92 € but of a forwarder it is 78. The compact class forwarder creates significantly smaller impact on the soil by reducing ruts depth and soil compaction, which is especially important in sanitary fillings and extraction of seed trees in regenerated areas.

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“…Forest road network is one ecosystem, which is managed by a human, and it can positively or adversely affect the stands next to the existing plants and trees (Demir, 2007), therefore is important to assess the magnitude of the anthropogenic impact on this ecosystem (Gadow et al, 2013). Irregular, naturally created shaped areas transformation into a regular and incorrectly performed thinning can lead to a deterioration of the health status in the young stands, causing a variety of diseases and insect invasion (Ruba et al, 2014). The aim of the research was to analyze impact of forest plots spatial structure on management of Norway spruce young forest stands).…”

Section: Introductionmentioning

confidence: 99%

Sanitary Condition of Picea Abies (L. ) Karst. Young Forest Stands Depending on the Spatial Specificity

Ruba¹,

Miezīte²,

Liepa³

2018

AGR

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As a result of nature resources intensive use, most of ecosystems have been converted. Anthropogenic impact includes changes of forest stands structure and their spatial specificity in the forest area. Accordingly the sanitary state of Norway spruce young forest stands can be affected by different risk impact factors of management. The aim of the research was to analyze the spruce Picea abies (L. ) Karst. young forest stands sanitary condition depending on forest plots spatial specificity and location in the forest areas. The data were collected in 4 regions of Latvia in spruce young forest stands (1 -40 years old). The research was conducted in young natural and artificial stands (pure -44, mixed -42). In total 502 sample plots with a total area of 28250 mwere installed. The particular plot size (25, 50, 100 and 200 m) were selected depending on the stand average tree height, while their number depended on the forest stand area. A total area of investigated forest stands were 127. 5 hectares. Results showed that the expression of spatial specifics depended on risk factors and their intensity, as well as the environmental characteristics. Damages caused by abiotic risk factors at different forest stands were not the same regarding intensity, nature and volume, but more or less closely were related to all site conditions. Spatial specificity of forest stands area (regular and irregular), as well as their location in the forest massif significantly affects the spruce young forests sanitary status (respectively p=0. 027 and p=0. 002). Different risk factors damage to forests, bordering with spruce or pine young growths, cutovers and various types of infrastructure, were identified as much more important.

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Impact of risk factor management on the sanitary condition of Norway spruce (Picea abies [L.] Karst.) pure stands in Latvia

Cited by 4 publications

References 8 publications

Height Increment of Naturally Regenerated Young Forest Stands of Scots Pine Pinus Sylvestris L. In Myrtillosa Forest Site Type

Height Increment of Naturally Regenerated Young Forest Stands of Scots Pine Pinus Sylvestris L. In Myrtillosa Forest Site Type

Evaluation of productivity and costs of Malwa forest machine in sanitary fellings in Latvia

Sanitary Condition of Picea Abies (L. ) Karst. Young Forest Stands Depending on the Spatial Specificity

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