Botanical compositon, distribution and adaptation of natural vegetation under semi arid conditions in Jordan
1988
Al-Syoof, M.K.
Botanical composition of the natural vegetation was evaluated at Muwaqqer at about 150 mm rainfall in 1986/87 and at Daba'a Range Reserve at 145.8 mm rainfall in 1987. Number of individuals, cover percentage, plant height, frequency percentage, abundance and density increased at Muwaqqer in 87 compared to the previous season due to better environmental conditions, and a second year of protection from grazing. The adaptability of some local and introduced forage cultivars for improving the natural vegetation of the Muwaqqer area was tested. Eight forage cultivars were evaluated under three supplementary water regimes - 0, 120 mm and 240 mm - in a split plot design with four replicates. As supplementary water level was raised the measures of various growth characteristics of species and their productivity per unit area significantly increased. Also an interaction effect between species and supplemental irrigation treatments was highly significant for all variables studied. The results of this study indicated that local species seem to be adapted to the conditions of Muwaqqer. The eight forage species this investigation was carried on were Aegilops ovata L., Hordeum vulgare L., Hordeum spontaneum C. Kock, Lolium multyflorum L., Lolium rigidum Gaud. cv. Wimmera, Phalaris canariensis L., Lathyrus sativus L., and Meddicago scutellata cv. Robinson snail medic. Reseeding the natural vegetation with such species could improve the productivity and the quality of the pasture
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