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Ecological Assets Assessment of Aerial Seeding Afforestation in Yulin Area

Author: CaoHua
Tutor: WangRangHui; WangSuoMin
School: Nanjing University of Information Engineering
Course: Ecology
Keywords: aerial seeding forest landscape pattern the character of forest stand ecological asset
CLC: S725.72
Type: Master's thesis
Year: 2012
Downloads: 58
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Abstract

Ecological asset was the material basis for the sustainable development of the national economy, but also it was the basic guarantee of harmonious coexistence of human society. Landscape change was the important factor of global environmental change, Landscape pattern and its dynamic change process will reflect characteristics of environmental and evolution for regional. Starting from landscape point of view, studying and grasping ecological asset information of region will provide important support for address climate change and biological.Based on remote sensing analyses, experimental data and field survey, the character of landscape, forest and the spatial distribution of ecological assets to Yulin were analyzed. The sustainable management and green deserticulture implementation way were blend into aerial seeding forestry eco-engineerings, and then put forward the model of aerial seeding afforestatial sustainable development. The results showed as follows:1) The area of cultivated land landscape was the largest, which was about33.69%. Water area landscape was the smallest, which was about1.16%. The aerial seeding forest area was about6.2%of the total area. The level of landscape fragmentation and landscape heterogeneity were comparatively large of plot area, also the degree of dominance was lower.2) The plantation coverage of each sample plot was between10%and80%, which with high quality, and the vegetation with well grown. In the study plots, the result shows that the SPAD was different in different years. A conclusion were analyzed that the different aerial seeding forest plant pattern has different ratio of wetting-drying-time in different years. The biomass of Korshinsk Peashrub, Salix psammophila and Dester Wormwood was3736.76kg/hm2, it was the largest. The biomass of Agriophyllum squarrosum is47.26k g/hm2, it was the smallest.3) The results showed that the average contents of soil organic matter are between1.102mg/g and2.616mg/g of all the sample lands, the average contents of the entire nitrogen are between0.110mg/g and0.148mg/g. In different layers, the contents of soils sucrase are between0.095mg/g and0.997mg/g, and the soil cellulose contents are between0.082mg/g and0.410mg/g.4) In different layers of all sample lands between Ocm and100cm, Significant positive correlation are both between temperature and moisture content, and it was between amount of microbes and the content of organic carbon. The soil indicators of different groups were compared, most of them were also positively correlated, but the soil bulk density exhibited significant negative correlation with other index.5) The ecological assets of aerial seeding forest in Yulin was RMB80.7821×108, and the total value of ecological assets of aerial seeding forest have significant difference in each regions. The value of some regions was comparatively large which border on Mu Us Shadi, it was81.19%of total value.6) After aerial seeding forest, the ways of resource management should be make scientific and reasonable, meanwhile by using the sustainable management mode.The management strategy adopted in sand industry is worth to be followed. Constructing the model of sustainable development should base on balancing economic development and ecological environment efficiency.

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CLC: > Agricultural Sciences > Forestry > Silviculture, tree breeding and afforestation techniques > Afforestation techniques > Afforestation > Afforestation
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