Publications

Scientific publications

Соколов А.И., Пеккоев А.Н., Харитонов В.А.
Влияние периодического внесения азотных удобрений на качество древесины сосны обыкновенной в культурах
// Успехи современного естествознания. № 11. 2016. C. 75–79
Sokolov A.I., Pekkoev A.N., Kharitonov V.A. 1. Effect of regularly repeated applications of nitrous fertilizers on timber quality in Scots pine crops // Advances in current natural sciences. № 11. 2016. P. 75–79
Keywords: forest fires, pine crops, mineral fertilizers,radial increment, latewood, wood density
The effect of repeated applications (every 4–6 years) of nitrous and complete fertilizers on the growth and timber quality of 53-year-old pine crops in burnt clearcuts with sandy soils was investigated. From a sylvicultural point of view, application of a complete fertilizer is more effective for restoration of pine habitats affected by burning. Three decades after the last treatment, pine growth in the plots exceeded that of the control by 25 % in terms of diameter and by 20 % in terms of height. Average tree volume in treatments with nitrous fertilizer showed no significant difference from the control, whereas in treatments with complete fertilizer it increased 1,8-fold. The after-effect of treatment with nitrous fertilizer alone was observed for 5 years, and for 6 years in the case of complete fertilizer. The number of layers per 1 cm of timber was 8–10, the percentage of latewood was 28–29 %, and the density was 432–446 kg/m3. During the period of application of complete fertilizer timber density reliably decreased by 6,5 %. Later on, this parameter nearly recovered to the control values. Generally speaking, the final timber quality matched that of natural pine stands of the Russian boreal zone.
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Last modified: January 10, 2017