莫索湾免灌溉防护林稳定性研究
文献类型：学位论文
| 作者 | 丁改改 |
| 答辩日期 | 2017-05-01 |
| 文献子类 | 硕士 |
| 授予单位 | 中国科学院大学 |
| 授予地点 | 新疆乌鲁木齐 |
| 导师 | 蒋进 |
| 关键词 | 莫索湾 人工梭梭林 土壤理化性质 物种多样性 林分结构 稳定性 Mosuowan Haloxylon ammodendronplantation chemical and physical properties of soil species diversity stand structure stability |
| 学位专业 | 工程硕士 |
| 英文摘要 | In this study, we choosen the typical area Mosuowan, which was the arid-semi arid desert-Oasis Transitional Zone as the study area, and shelterbelt system composed by four forests were research objects, including three planted forests that used snow-sand dressing afforestation, harvesting afforestation and autumn irrigation afforestation in 1984 years, and the other was natural vegetation zone with the constructive species of Haloxylon Ammodendron, Tamarix chinensis Lour, Reaumuria songarica (Pall.) Maxim and Calligonum mongolicum Turcz. Using principal component analysis (PCA) and stability degree index ( SDI ) to evaluate the stability through investigating and analysing the soil quality and species composition and diversity and forest structure, with a view to providing technical support for the irrigation-free afforestation in the desert area of north Xinjiang.Results showed that: Soil particle diameter of snow-sand dressing forest, which is located in windward slope, were more larger, with on clay particles distribution. And the other three forests were smaller with a little clay. There were no salinization in three planted forests, and all belong to alkaline soil; soil water content in four forests were natural vegetation >harvesting forest > irrigation forest > snow-sand dressing forest, and it was divided into three period, which were hydrate phase,filtration period and stability period, according to different seasons.The distribution of vegetation and species diversity were influenced by soil water content, electrical conductivity and soil pH, also, soil biological crusts and soil particle diameter were factors. The species diversity tend to be stable when soil water content was more than 8.0 %, and declined with the soil pH over 9.0.The proportion of lower age class （Ⅰ-Ⅳ）in snow-sand dressing forest,harvesting forest and irrigation forest were 0.85:1, 1.2:1 and 1.2:1, respectively. That means the three planted forests have the good capacity for natural regeneration. And all age classes distributed, meaning they have formed uneven multi-storied mixed forest community through their own natural regeneration, it was conducive to the stability of the forests. The shelter forest system in Mosuowan is in a stable development through the comprehensive evaluation, and the stability in three planted forests were irrigation forest > harvesting forest > snow-sand dressing forest. The survival of Haloxylon ammodendron and seeding, the average plant height and canopy, density, species diversity, soil water content and biological crust coverage were the main factors for stability. |
| 学科主题 | 环境工程 |
| 语种 | 中文 |
| 源URL | [http://ir.xjlas.org/handle/365004/14867]  |
| 专题 | 新疆生态与地理研究所_研究系统_荒漠环境研究室 |
| 作者单位 | 中国科学院新疆生态与地理研究所 |
| 推荐引用方式 GB/T 7714 | 丁改改. 莫索湾免灌溉防护林稳定性研究[D]. 新疆乌鲁木齐. 中国科学院大学. 2017. |
入库方式： OAI收割
来源：新疆生态与地理研究所
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