EFFECT OF DEAD TREES ON SOIL PROPERTIES OF NATURAL POPULATIONS OF POPULUS CASPICA IN THE NORTHERN FORESTS OF IRAN

Mitra Shahmaghsood, Mir Fallahchai, Vahid Hemmati, Ali Salehi
2013 Indian Journal of Fundamental and Applied Life Sciences   unpublished
Dead trees are the main components of soil preparation and the dynamics of forest ecosystems and they have an important role in improving the fertility of forest soils. For this purpose surrounding soil white pellet dead trees, were studied in a range area of 382.5 hectares of Safrabasteh forests of northern Iran. In this study, strip transect width of 10 m was used and were examined all dead trees white pellets. According to the decay rate, each dead tree were placed in four different classes
more » ... different classes of dead trees as new, begin ,advanced and complete of decay. Beside with each dead tree,3soil samples from depths of 0 to 20 cm(the distances below 0.5 m and 1 m dead trees) harvested and were transferred to the laboratory. In this study,soil physical properties including soil texture,true specific gravity and soil bulk density,porosity and saturated soil moisture were studied. The results of this study showed that there is no significant difference between different degrees of decay in different distances and factors like saturation percentage,in 95% confidence difference. But there are significantly difference true density of soil between different degrees of decay in a distance of one meter and apparent specific weights and soil porosity between different degrees of decay in 95% confidence difference. But, there was no significant difference at 95%soil apparent specific weights and soil porosity at zero, and half a meter on dead trees.
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