کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
87234 159240 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Variation in the morphological structure of the crown of Norway spruce in North Estonian alkalised soil
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
پیش نمایش صفحه اول مقاله
Variation in the morphological structure of the crown of Norway spruce in North Estonian alkalised soil
چکیده انگلیسی

Characterisation of tree crown structure provides critical information to assess a variety of ecological conditions for multiple purposes and applications. The aim of investigation was to elucidate the influence of the alkaline soil on the formation of the crown of Norway spruce (Picea abies (L.) Karst.). The seven sample plots (0.05 ha) with 75–90-year-old spruce stands of Oxalis–Myrtillus site type were selected at different distances from a cement plant influenced over 40 years by alkaline dust pollution. The studies were conducted 13 years after dust pollution had practically stopped. High pH values (6.1–7.8), large concentrations of dominant dust components (Ca, Mg, K) and a lower level of N and organic matter in the upper layers of soil within about 6 km from the emission source compared to the unpolluted control area 30.4 km from the source (pH 3.3) were found. Disbalance in mineral composition in needles and shoots was established, deficite in N and excess in Ca and K concentrations were brought about a great differentiation in growth and biomass formation between unpolluted and polluted trees. On the most polluted area the average height of trees and living crown, the length and dry mass of shoots and needles were lower, and average life span of needles were shorter than in unpolluted area, indicating an increased defoliation rate of the crown.


► We examine changes in the Norway spruce crown formation in alkalised soil.
► The decrease of growth of trees and of organs were resulted by alkalisation.
► Changes in soil chemical composition resulted by alkaline cement dust impact.
► Bisbalance in mineral nutrition of trees, deficite in N, excess of Ca and K was found.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Forest Ecology and Management - Volume 278, 15 August 2012, Pages 9–16
نویسندگان
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