A study on the range ecosystem of Wadi Habis (Egypt)
2005
El-Qadhi, Hasan F. | Hanshal, Yahya A. | Shahba, Muhammad
Fifty stands were selected to represented Wadi Habis (300 km west of Alexandria). Species cover and phytomass were recorded and soil samples were collected. Twenty-throe perennials and 10 annuals were collected to evaluate the rgttritive values. The matrix of stands x species was classified using TWINSPAN and eradicated using DECORANA techniques. The relationships between the ve tion and environmental variables were assessed statistically. Some of the di ty indices were calculated for the recognized vegetation groups in order to judge their relationships with other community and environmental properties, Five vegetation groups were r cogmized: Suaeda pruinosa, Thymelaea hirsute, Lygeum spartum, Aremisia herba-alba, Thymelaea hirsute, Artemisia herba-alba, Artemisia herba-albs, Asphodelus ramosus and Asphodelus uamosus, Gymnocarpos decander Hygr osoopic moisture, organic matter and nitrogen are the most important soil factors that affect the dis tribution of the venation groups in this area. The preach study indicated that each mm of annual rainfall produced about 5.3kg dry rttattddha/yr Also indicated that most of the species have relatively low content of P. N and K, but high of Ca, mg and Fe. In addition, Ca1P ratio was much higher than the optimum range for the animal diet. Also protein content was lower than the optimum level but the carbohydrate content is reasonable for most species.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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