Growth performances of Pinus brutia, turkish pine, and nutrient levels in needles, litter fall and soil properties of afforested semi arid areas in the eastern mediterranean, Jordan
2011
Alomary, A.M.
Growth performance and nutrient levels in needles, litter fall and soil properties at two soil depths in Wasfi Tal forest in Jordan were studied. Two factors, aspects (North, South, East, West) and slope positions (Upper, Middle, Lower) were studied. Aspects showed significant effect on height and Diameter Breast Height (DBH), northern and eastern exhibited a higher height and DBH growth compared to southern and western slopes. In contrast, slope positions showed insignificant effect after passing stand pole stage. Whereas available water are the limiting factor for plant growth. The concentration of macro nutrients N in Turkish pine trees was about at adequate level, where as P, K and micro nutrients of Fe, Zn and Cu were bellow normal ranges whereas Ca and Mg were two folds more abundant than normal levels in needles. This indicates that, pine adapted to poor soil, high pH , and low fertility. Furthermore, nutrient concentrations in litter decreased in the order of E S N W as in the needles. The accumulation of nutrients in the needles during life cycle was accompanied by similar accumulation in forest floor. A significantly higher concentration of N, K, and Zn in soil depth of 0-5 cm was found compared to the depth of 5-30 cm. Other elements showed the same tendency but not-significant. Likewise, the pH, ECE and OM detectable, yet showed a similar pattern.
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