Journal
ENVIRONMENTAL MONITORING AND ASSESSMENT
Volume 187, Issue 7, Pages -Publisher
SPRINGER
DOI: 10.1007/s10661-015-4681-5
Keywords
Betula pendula; Wood ash; Cutaway peatland; Leaf/shoot anatomy; Photosynthesis; Carbohydrates
Categories
Funding
- Estonian Ministry of Education and Research [IUT21-4 (B21004)]
- Environmental Investment Centre [29, 3708]
- State Forest Management Centre
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Trees in cutaway peatland are growing in difficult conditions. Fertilization with nutrient-rich wood ash helps improve growth conditions. Photosynthesis and carbohydrate concentration along leaf anatomy were studied on plots treated with 10 and 5 t ha-1 wood ash (WA10 and WA5) and on untreated (Control) plot to explain the physiological background of the differences in tree growth. The leaves fromWA10 had the largest leaf area, total thickness, the thickest mesophyll and also significantly larger average values of all anatomical parameters of the shoots. The photosynthetic assimilation was significantly higher on treated plots at 200 and 400 ppm CO2 levels. In leaves on the treated plots, the sucrose concentration was lower while that of starch was higher than in trees on untreated soil. The differences in the maximum photosynthesis were relatively small. At unit ground, the leaf area provided for a wood ash-treated tree an efficient surface for CO2 assimilation, light interception and some starch storage during the growing period.
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