Illumination of the soil surface and development of the grass cover in fild protective belts of different species composition
Journal Title: Лісівництво і агролісомеліорація - Year 2013, Vol 123, Issue
Abstract
The paper dwells on protective stands of different species composition. Condition of forest shelter belts in the area of Scientific Research Economy "Dokuchayevske" of Kharkiv National Agrarian University had been analyzed. Illumination under stand canopy, openness of vertical profile of shelterbelts, and relationship between them have been determined. In the forest belt with dense structure (No 61) illumination inside the belt is much lower (by 13 %) than in the openness-blower one (No 66). The influence of illumination of forest belts on aboveground phytomass had been analized. It was determined that a dense belt has a much smaller amount of herbs which is associated with a smaller amount of light that penetrates the stand canopy. The large number of seedlings in the forest belt number 61 (8.3 times more than in the shelter belt number 66) were the limiting factor that influenced the spread of grass cover in the belt. In marginal part of the forest belt number 61 despite of a small illumination it was collected 100 % of the total mass of dry weight herb (412 g), that is, side illumination was a major factor that influences on ground cover. A small number of seedlings and a high level of openness (35 %) caused the subcanopy area of forest belt number 66 to be occupied by gramineous vegetation (1182.8 g). The maximum illumination of ground cover occurs mainly in marginal rows. Inside the shelter belt on experimental plots the fluctuations in illumination and mass of vegetation are not exceeding respectively 14.6 and 71.7 %. It was determined that the main factors affecting the illumination under the canopy were openness and the number of seedlings and shrubs.
Authors and Affiliations
S. Molchanovska
Keywords
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