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首页> 外文期刊>Indian Journal of Forestry >Rangeland afforestation in Southern Jordan: performance and effect
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Rangeland afforestation in Southern Jordan: performance and effect

机译：约旦南部的牧场绿化：效果与成效

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Overgrazed rangeland (200 mm annual rain) has been planted with Pinus halepensis and Acacia saligna in 1983 as part of a "green belt" concept against desert encroachment. A first evaluation was carried out in 1996, The plantings survived because theywere government plantations. The overall coverage was estimated at 50 to 65 percent Pinus reached a mean height of 3.8 m and a stem diameter (DBH) of 4.5 cm varying with slope position. The Acacia trees were smaller (2.6 m) but had a larger crown coverage (20 against 5.4 m~2) and a thicker stem diameter. The planted and protected area had a denser ground cover than the area unprotected against grazing (64 against 13 g/m~2). Weight contribution of different species is provided. An enrichment in C of thesoil under the plantation was estimated but was not statistically significant. A positive effect of the plantation is seen in the protection and the consequently denser cover of the ground vegetation.
机译：1983年，过度放牧的牧场（每年降雨200毫米）与halepensis松和Acacia saligna一起种植，作为“绿化带”概念的一部分，以防止沙漠侵蚀。 1996年进行了首次评估，因为这些种植园是政府种植园，所以它们得以幸存。总体覆盖率估计为50％至65％。松树的平均高度为3.8 m，茎直径（DBH）为4.5 cm，随坡度的变化而变化。相思树较小（2.6 m），但树冠覆盖较大（20相对于5.4 m〜2），茎粗。种植和保护区的地面覆盖比未保护区的更厚（64覆盖13 g / m〜2）。提供了不同物种的重量贡献。估计了人工林下土壤碳的富集度，但无统计学意义。人工林的积极作用体现在对地面植被的保护以及因此而更加茂密的覆盖上。

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