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首页> 外文会议>2010 International conference of international conference on combating land degradation in agricultral areas. >Relationship between Seedling and Mature Vegetation on the hilly-gullied Loess Plateau
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Relationship between Seedling and Mature Vegetation on the hilly-gullied Loess Plateau

机译：黄土丘陵沟壑区苗木与成熟植被的关系

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Seedling is an indispensable stage in plant cycle life, and seedling survival is important during natural vegetation restoration, especially on the Loess Plateau. In 2007, we selected 4 plots of Artemisia scoparia communities (ASC) and 4 plots of Artemisia gmelinii+Artemisia giraldii communities (AGC), examined seedling richness, diversity during the rainy season, and examined mature vegetation richness, coverage, and frequency in August. The results showed that seedlings density of ASC were 29 n m-2, 33 n m-2, 20 n m-2 and 31 n m-2 in July to October respectively, and that of AGC were 14 n m-2, 12 n m-2, 6 n m-2 and 9 n m-2 respectively; A. scoparia seedlings represented 53.2% of the total seedlings in ASC, the dominant species in AGC only account for less than 5% of the total seedlings. Most of the seedlings found were belonged to Compositae, Leguminoseae and Gramineae; 80% of seedlings in ASC were mainly comprised of A. scoparia and Lespedeza davurica, while in AGC that consisted of more than 6 species, such as L. davurica, Sophora viciifolia, Dracocephalum moldavicaand, A. gmelinii, Patrinia heterophylla, Heteropappus altaicus so on. S?rensen similarity index between monthly seedlings was approximately 0.47 in ASC and 0.35 in AGC; Sφrensen similarity index between seedlings and mature vegetation ranged from 0.18 to 0.34 in ASC, and varied from 0.26 to 0.39 in AGC. These results suggested that seedling establishment would be a bottleneck for natural vegetation restoration when seed supply and seedling emergence were possible.
机译：苗期是植物生命周期中必不可少的阶段，在自然植被恢复期间，尤其是在黄土高原上，幼苗的存活至关重要。在2007年，我们选择了4个蒿蒿群落（ASC）和4个蒿蒿+吉拉第蒿群落（AGC），调查了雨季的幼苗丰富度，多样性，并研究了8月成熟的植被丰富度，覆盖率和频率。结果表明：7- 10月ASC的幼苗密度分别为29 n m-2、33 n m-2、20 n m-2和31 n m-2，而AGC的幼苗密度为14 n m-2、12。 n m-2、6 n m-2和9 n m-2；在ASC中，A。scoparia幼苗占幼苗总数的53.2％，AGC中的优势种仅占幼苗总数的不到5％。发现的大多数幼苗属于菊科，豆科和禾本科。 ASC中80％的幼苗主要由红景天和Lespedeza davurica组成，而在AGC中则由L. davurica，槐属，苦瓜，Dracocephalum mouldavicaand，A。gmelinii，异花败酱，杂草上。 ASC的月苗之间的S？rensen相似性指数约为0.47，而AGC约为0.35。 ASC中幼苗与成熟植被之间的Sφrensen相似性指数在0.18至0.34之间，AGC在0.26至0.39之间变化。这些结果表明，在可能提供种子和出苗的情况下，幼苗的建立将成为自然植被恢复的瓶颈。

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