scholarly journals Effects of long-term fertilisation on soil properties in Scots pine and Norway spruce stands

Silva Fennica ◽  
2014 ◽  
Vol 48 (1) ◽  
Author(s):  
Anna Saarsalmi ◽  
Pekka Tamminen ◽  
Mikko Kukkola
Keyword(s):  
Soil Properties ◽  
Norway Spruce ◽  
Scots Pine ◽  
Spruce Stands

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

2001 ◽  
Vol 31 (5) ◽  
pp. 899-909 ◽  
Author(s):  
Staffan Jacobson ◽  
Folke Pettersson
Keyword(s):  
Norway Spruce ◽  
Scots Pine ◽  
N Fertilization ◽  
Nutrient Deficiencies ◽  
Growth Responses ◽  
Growth Increase ◽  
Spruce Stands ◽  
Fertilization Effect ◽  
Mineral Soils

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 20–30 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 P–K–Mg were in most cases insignificant for both tree species. Overall, the joint addition of P–K–Mg resulted in a nonsignificant additional growth increase of 0.2 m3·ha–1·year–1, 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.

Long-term responses of Scots pine and Norway spruce stands in Sweden to repeated fertilization and thinning

2014 ◽  
Vol 320 ◽  
pp. 118-128 ◽  
Author(s):  
Johan Bergh ◽  
Urban Nilsson ◽  
H.Lee Allen ◽  
Ulf Johansson ◽  
Nils Fahlvik
Keyword(s):  
Norway Spruce ◽  
Scots Pine ◽  
Spruce Stands

scholarly journals Imitated Whole Tree Harvesting Show Negligible Effect on Economic Value of Spruce Stands

Forests ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 841
Author(s):  
Iveta Desaine ◽  
Annija Kārkliņa ◽  
Roberts Matisons ◽  
Anna Pastare ◽  
Andis Adamovičs ◽  
...  
Keyword(s):  
Norway Spruce ◽  
Economic Value ◽  
Forest Types ◽  
Spruce Stands ◽  
The Difference ◽  
Growing Conditions ◽  
Whole Tree Harvesting ◽  
Whole Tree ◽  
Tree Harvesting

The increased removal of forest-derived biomass with whole-tree harvesting (WTH) has raised concerns about the long-term productivity and sustainability of forest ecosystems. If true, this effect needs to be factored in the assessment of long-term feasibility to implement such a drastic forest management measure. Therefore, the economic performance of five experimental plantations in three different forest types, where in 1971 simulated WTH event occurred, was compared with pure, planted and conventionally managed (CH) Norway spruce stands of similar age and growing conditions. Potential incomes of CH and WTH stands were based on timber prices for period 2014–2020. However, regarding the economics of root and stump biomass utilization, they were not included in the estimates. In any given price level, the difference of internal rate of return between the forest types and selected managements were from 2.5% to 6.2%. Therefore, Norway spruce stands demonstrate good potential of independence regardless of stump removal at the previous rotation.

Do decomposing Scots pine, Norway spruce, and silver birch stems retain nitrogen?

2008 ◽  
Vol 38 (12) ◽  
pp. 3047-3055 ◽  
Author(s):  
Marjo Palviainen ◽  
Raija Laiho ◽  
Harri Mäkinen ◽  
Leena Finér
Keyword(s):  
Norway Spruce ◽  
Scots Pine ◽  
Betula Pendula ◽  
Woody Debris ◽  
Nutrient Retention ◽  
Silver Birch ◽  
N Dynamics ◽  
Early Stages ◽  
N Pool

The contents of nitrogen (N) have generally been observed to increase in the early stages of decomposition in coarse woody debris and then to decrease slowly. This is potentially an important mechanism of nutrient retention in ecosystems after disturbances. We studied N dynamics in decomposing Scots pine ( Pinus sylvestris L.), Norway spruce ( Picea abies (L.) Karst.), and silver birch ( Betula pendula Roth.) stems in Finland. The oldest stems had decomposed for 34 (spruce and birch) or 45 (pine) years. Concentrations of N in both fallen logs and standing snags increased and C/N ratios decreased with time, and birch had significantly higher N concentrations and lower C/N ratios than pine and spruce. Even though increased N contents were observed in some cases, N was generally already released in the early stages of decomposition and more rapidly from birch than from conifers. Based on model analysis, from 40% (pine and spruce) to 50% (birch) of initial N was released within 30 years. The results suggest that decomposing stems of especially Scots pine and Norway spruce retain N rather effectively in boreal forest ecosystems and form a long-term, small but steady N pool with a slow release rate.

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

1994 ◽  
Vol 65 (2-3) ◽  
pp. 123-134 ◽  
Author(s):  
Timo Pukkala ◽  
Taneli Kolström ◽  
Jari Miina
Keyword(s):  
Norway Spruce ◽  
Scots Pine ◽  
Spruce Stands

scholarly journals 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 ◽  
2018 ◽  
Vol 52 (4) ◽  
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 (€) and average unit value (€ 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 € m and the bias of 0.58 € m in Scots pine stands and 2.60 € m, and 0.35 € 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.–3–3–3–3–3

Sign in / Sign up

Export Citation Format

Share Document