Growth responses following nitrogen and N–P–K–Mg additions to previously N-fertilized Scots pine and Norway spruce stands on mineral soils in Sweden

To study growth responses to refertilization, 12 Scots pine (Pinus sylvestris L.) and 6 Norway spruce (Picea abies (L.) Karst.) stands used in long-term nitrogen (N) fertilization experiments were refertilized with N, either alone or with various combinations and doses of phosphorus (P), potassium (K), and magnesium (Mg). Many of the experimental plots had previously been subjected to heavy N fertilization regimes over a period of 2030 years. On average, for all the experiments, the latest N addition resulted in a significant growth increase, corresponding to 57% of the mean annual volume increment and comparable with the response to the initial fertilization. Differences in growth response between fertilization with N alone or in combination with PKMg were in most cases insignificant for both tree species. Overall, the joint addition of PKMg resulted in a nonsignificant additional growth increase of 0.2 m3·ha1·year1, corresponding to 6% of the N fertilization effect. Repeated additions of N alone had no effect on the P, K, and Mg concentrations in current-year needles. It was concluded that the repeated N fertilizations did not cause any serious nutrient deficiencies.

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Growth Responses of Boreal Scots Pine, Norway Spruce and Silver Birch Seedlings to Simulated Climate Warming over Three Growing Seasons in a Controlled Field Experiment

Forests ◽

10.3390/f11090943 ◽

2020 ◽

Vol 11 (9) ◽

pp. 943

Author(s):

Katri Nissinen ◽

Virpi Virjamo ◽

Antti Kilpeläinen ◽

Veli-Pekka Ikonen ◽

Laura Pikkarainen ◽

...

Keyword(s):

Norway Spruce ◽

Scots Pine ◽

Root Biomass ◽

Growing Season ◽

Silver Birch ◽

Shoot Biomass ◽

Growth Responses ◽

Growing Seasons ◽

Simulated Climate ◽

Shoot And Root Biomass

We studied the growth responses of boreal Scots pine (Pinus sylvestris L.), Norway spruce (Picea abies L. Karst.) and silver birch (Betula pendula Roth) seedlings to simulated climate warming of an average of 1.3 °C over the growing season in a controlled field experiment in central Finland. We had six replicate plots for elevated and ambient temperature for each tree species. The warming treatment lasted for the conifers for three growing seasons and for the birch two growing seasons. We measured the height and diameter growth of all the seedlings weekly during the growing season. The shoot and root biomass and their ratios were measured annually in one-third of seedlings harvested from each plot in autumn. After two growing seasons, the height, diameter and shoot biomass were 45%, 19% and 41% larger in silver birch seedlings under the warming treatment, but the root biomass was clearly less affected. After three growing seasons, the height, diameter, shoot and root biomass were under a warming treatment 39, 47, 189 and 113% greater in Scots pine, but the root:shoot ratio 29% lower, respectively. The corresponding responses of Norway spruce to warming were clearly smaller (e.g., shoot biomass 46% higher under a warming treatment). As a comparison, the relative response of height growth in silver birch was after two growing seasons equal to that measured in Scots pine after three growing seasons. Based on our findings, especially silver birch seedlings, but also Scots pine seedlings benefitted from warming, which should be taken into account in forest regeneration in the future.

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Corrigendum to “Accumulation of standing aboveground biomass carbon in Scots pine and Norway spruce stands affected by genetic variation” [For. Ecol. Manage. 496 (2021) 119476]

Forest Ecology and Management ◽

10.1016/j.foreco.2021.119643 ◽

2021 ◽

Vol 500 ◽

pp. 119643

Author(s):

Daniel J. Chmura ◽

Marzenna Guzicka ◽

Roman Rożkowski

Keyword(s):

Genetic Variation ◽

Norway Spruce ◽

Scots Pine ◽

Aboveground Biomass ◽

Biomass Carbon ◽

Spruce Stands

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A method for predicting tree dimensions in Scots pine and Norway spruce stands

Forest Ecology and Management ◽

10.1016/0378-1127(94)90164-3 ◽

1994 ◽

Vol 65 (2-3) ◽

pp. 123-134 ◽

Cited By ~ 5

Author(s):

Timo Pukkala ◽

Taneli Kolström ◽

Jari Miina

Keyword(s):

Norway Spruce ◽

Scots Pine ◽

Spruce Stands

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Validating the predicted saw log and pulpwood proportions and gross value of Scots pine and Norway spruce harvest at stand level by Most Similar Neighbour analyses and a stem quality database

Silva Fennica ◽

10.14214/sf.9972 ◽

2018 ◽

Vol 52 (4) ◽

Cited By ~ 1

Author(s):

Jukka Malinen ◽

Harri Kilpeläinen ◽

Erkki Verkasalo

Keyword(s):

Norway Spruce ◽

Scots Pine ◽

External Quality ◽

Log Reduction ◽

Unit Value ◽

Stem Quality ◽

Spruce Stands ◽

Average Unit ◽

Wood Procurement ◽

Tree Quality

Detailed pre-harvest information about the volumes and properties of growing stocks is needed for increased precision in wood procurement planning for just-in-time wood deliveries by cut-to-length (CTL) harvesters. In the study, the non-parametric Most Similar Neighbour (MSN) methodology was evaluated for predicting external quality of Scots pine and Norway spruce, expressed as stem sections fulfilling the saw log dimension and quality requirements of Finnish forest industry, as they affect the recovery of timber assortments and the value of a pre-harvest stand. Effects of external tree quality were evaluated using saw log recovery and saw log reduction caused by stem defects, as well as total timber value (â¬) and average unit value (â¬ m) in a stand. Root mean square error (RMSE) of saw log recovery and reduction were 9.12 percentile points (pp) for Scots pine and 6.38 pp for Norway spruce stands. In the unit value considerations, the predictions compared with measurements resulted in the RMSE of 3.50 â¬ m and the bias of 0.58 â¬ m in Scots pine stands and 2.60 â¬ m, and 0.35 â¬ m in Norway spruce stands, respectively. The presented MSN based approach together with the utilization of the external stem quality database included in the ARVO software could provide dimension and external quality predictions usable for pre-harvest assessment of timber stock at a stand level. This prediction methodology is usable especially in analyses where timber assortment recoveries, values and unit prices are compared when different bucking objectives are used.â3â3â3â3â3

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Radial growth of Scots pine and Norway spruce stands as an indicator of soil and environmental conditions

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/875/1/012074 ◽

2021 ◽

Vol 875 (1) ◽

pp. 012074

Author(s):

B Aparin ◽

B Babikov ◽

D Zolotukhin ◽

E Mingareeva

Keyword(s):

Norway Spruce ◽

Tree Ring ◽

Scots Pine ◽

Radial Growth ◽

Ring Width ◽

Tree Ring Width ◽

Average Growth ◽

Cyclical Pattern ◽

Spruce Stands ◽

Successive Change

Abstract The study presents an analysis of radial growth of Scots pine and Norway spruce trees growing on drained soils formed on varved clays at the sample sites of the Lisino Experimental Forestry (Lisino). Based on dendrochronological studies in Lisino, it has been found that the radial growth of Scots pine and Norway spruce is a sensitive indicator of changes in the soil water regime, climate, and phytocenotic relationships. On the basis of the character of tree-ring width growth, the growth charts allowed distinguishing zones with close to average growth values, as well as with increased and decreased values of radial growth. The cyclical pattern of tree ring width is well expressed in the successive change of zones. The availability of dendrochronological research materials with precise spatial and temporal reference makes it possible to organize monitoring of radial growth of trees as an indicator of changes in climate and habitat conditions.

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