• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Soil seed bank composition and distribution on eroded slopes in the hill-gully Loess Plateau region (China): Influence on natural vegetation colonization
【24h】

Soil seed bank composition and distribution on eroded slopes in the hill-gully Loess Plateau region (China): Influence on natural vegetation colonization

机译：山谷黄土高原地区侵蚀斜坡土壤种子银行构成与分布（中国）：对自然植被殖民的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

On the Chinese Loess Plateau, serious slope and gully erosion have caused a decrease in soil water capacity and fertility, which has resulted in vegetation degradation and a reduction in agricultural productivity. Great efforts have been made to restore vegetation to control soil erosion, but the efficiency of artificial revegetation is not satisfactory. Natural revegetation is an alternative. However, while soil seed banks are an essential source for natural revegetation, their composition and distribution on eroded slopes remains unknown. In addition, whether or not seed loss during soil erosion limits vegetation colonization is also unknown. In this work, soil seed bank composition and distribution were studied in three situations. Specifically, three main microsites were selected as sampling plots: fish-scale pits, as artificial deposited micro-topography; under tussocks, as trap microsites; and open areas, as eroded areas. Soil samples were collected at depths of 0-2cm, 2-5cm and 5-10cm. The soil seed bank was identified using germination experiments, and a total of 34 species were identified. The dominant species in the soil seed bank were annual/biennial herbs with an average proportion more than 90% and density reaching 19,000 seeds m-2. The pioneer species Artemisia scoparia was especially abundant. The dominant later successional species, such as Lespedeza davurica, Artemisia giraldii, Artemisia gmelinii, Stipa bungeana and Bothriochloa ischcemum, were present in the soil at a density that ranged from 38 to 1355 seeds m-2. Compared with the eroded open areas, the fish-scale pits retained a higher density of seeds, and the tussocks retained a larger number of species. However, there was no serious reduction of the soil seed bank in the erosion areas. The present study indicates that, on these eroded slopes, the soil seed bank is not the key factor limiting the colonization of natural vegetation.
机译：在中国黄土高原上，严重的坡度和沟壑侵蚀导致土壤水力容量和生育率降低，导致植被退化和农业生产力降低。已经做出巨大努力来恢复植被以控制土壤侵蚀，但人工植物的效率并不令人满意。自然植物是一种替代品。然而，虽然土壤种子库是天然植物的重要来源，但它们的构成和分布侵蚀斜坡仍然未知。此外，土壤侵蚀期间种子损失是否限制植被殖民化也是未知的。在这项工作中，在三种情况下研究了土壤种子堤组合物和分布。具体地，选择三个主要的微料作为抽样图：鱼鳞坑，如人工沉积的微型;在TUSSOCKS下，作为陷阱微量学;和开放区域，作为侵蚀的地区。在0-2cm，2-5cm和5-10cm的深度下收集土壤样品。使用萌发实验鉴定土壤种子池，鉴定了总共34种。土壤种子库中的主要种类是年/两年的草药，平均比例超过90％，密度达到19,000种种子M-2。 Pioneer物种Artemisia Scoparia特别丰富。优势后来的继承物种，如Lespedeza Davurica，Artemisia giraldii，Artiemisia Gmelinii，Stipa Bungeana和Bothriochloa Ischcemum，其密度范围为38至1355种Seeds M-2。与侵蚀的开放区域相比，鱼鳞坑保留了更高的种子密度，毒素保留了更多的物种。然而，侵蚀地区的土壤种子堤没有严重减少。本研究表明，在这些侵蚀的斜坡上，土壤种子库不是限制了自然植被定植的关键因素。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号