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Study on Herbs and Their Utilization Mould in Different Regions in Loess Plateau

Author: ShiJiangLan
Tutor: YangZhengLi
School: Northwest University of Science and Technology
Course: Crop Cultivation and Farming System
Keywords: Loess Plateau Grass Use Mode
CLC: S812
Type: Master's thesis
Year: 2002
Downloads: 131
Quote: 3
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Abstract


Gully aspect of the Loess Plateau, sparse vegetation, soil erosion is very serious. Forests or grassland ecological projects not only to the construction of ecological bring new opportunities, it also brings new challenges. Loess Plateau, soil erosion and other ecological problems in this area will be the sustainable economic and social development in the lower reaches of the Yellow River has great practical and historical significance. This study summarizes the main problems in the ecological environment construction, vegetation evolution and grassland resources and its regional characteristics. Grasses suitable area, based on site conditions by type selected districts mainly Suitable grasses, and propose the use of grasses under different site environments mode. The main conclusions are as follows: At present, the main problem in the construction of vegetation embodied in a single plant material, ignoring the excavation and utilization of local plant resources. Vegetation community structure, and the layout of the convergence. The large proportion of economic forest and grass, many places still ecological benefits placed in a secondary position. Less emphasis artificial restoration and rebuilding technologies, natural recovery research. Grass Models of the region and also of the main types of areas are not very clear. The Loess Plateau natural the vegetation zonal and non-zonal distribution characteristics, the general trend of reduced rainfall, natural vegetation succession to the direction of the drought biochemical. The main types of grassland resources in the meadow steppe, typical steppe and desert steppe. Meadow steppe xerophytic grasses and Artemisia dominate as the main constructive species of the typical grassland to xerophytic grasses and Compositae desert steppe grasses as the main constructive species associated with some Artemisia plants and spiny shrubs, and less than half shrubs. In the study on the basis of climate the banding, geomorphology partition and its location characteristics, the Loess Plateau is divided into warm temperate semi-humid 11 grasses suitable area of ??Shanxi, Shaanxi Loess Plateau gully area. Types of site conditions, based on topographic position, aspect of the Loess Plateau Mountain Ridge Top Mountain Ridge Yin (Yang) slope Yin (Yang) ditch sloping tableland surface, Yin (Yang) Plateau slope and ditch and terraces. Through existing artificial vegetation, natural vegetation community structure characteristics of highly refined, the the Loess Plateau grasses planted mode is grouped into nine major types of mixed grass forest mode. Adaptability and site type based on the study of the grasses of the Loess Plateau, the mode of use of each type of zone grasses integration and innovation to build research tableland surface ecological and economic business model made a total of 34 models.

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CLC: > Agricultural Sciences > Livestock, animal medicine,hunting,silkworm,bee > General Animal Science > Grassland Science,prairie school
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