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土壤 翻译
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| 马尾松天然林和人工林是红壤低丘地区植被恢复的先锋树种之一，由于人为或自然的因素，有很大一部分林分结构差、生产力低，森林生态系统内组成成分下降，林下植被稀少，林地土壤受到严重侵蚀，整个林分表现为涵养水源、固持土壤等生态效能低劣。由此可见，南方马尾松林的水土保持作用有限。 |
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Vesper(金币+5, 翻译EPI+1): 2010-11-19 09:12:33
| Pinus massoniana is one of the major pioneer species for vegetation reforestation due to the strong adaptability, preferable toleratcance to drought and infertility in southern China. However, most of those forests show poor structures and low productivity owing to the human or natural factors，so that the composition of forest ecosystems is reduced, covered with exiguous vegetation and subjected to severe soil erosion, resulting in poor eco-efficiency of such forests in the conservation of water and soils. Accordingly, Pinus massoniana forests play a limited role in water conservation. |
2楼2010-11-18 20:35:24
