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Structure and Diversity of Arthropod in Different Managed Areas in Organic Pear Orchard

Author: LiYiLin
Tutor: ZhangZhiYong
School: Beijing University of Agriculture
Course: Pomology
Keywords: Organic pear orchard Arthropod community Community structure Biodiversity
CLC: S436.612
Type: Master's thesis
Year: 2008
Downloads: 120
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Abstract


Structural characteristics as well as the diversity of arthropod community in order to understand the implementation of the organic cultivation measures Liyuan such park in the pear tree planting density the combined lamination, fertilization and other measures for the arthropod community impact, aimed at provide some theoretical basis for the implementation of such Liyuan organic cultivation and pest control measures, to guide production practices and use of biodiversity indicators of Beijing Shunyi organic pear orchard in three different cultivation area arthropod community structure its diversity system. The results are as follows: thin planting area (not the film) is significantly higher than the number of individuals of the species of arthropod in the same Liyuan the close planting area (film) and fertilization District (high density, film). District the psyllid insect pests Homoptera the most sparse plant highest proportion. Herbivorous taxa and parasitic taxa diversity index thin planting area, minimum, maximum fertilization area, dominant concentration index in thin planting area; predatory taxa diversity index largest in thin planting area, fertilizer application diversity The index of the smallest, the dominant concentration index contrast. Temporal dynamics of arthropod communities in three districts of diversity indicators analysis shows that, in line with the dynamic changes of the District arthropod community richness and evenness throughout the growing season, and dominance appear significant timing differences. Communities in the number of individuals thin planting area in the growing season, most of the time were higher than the other two districts. The main advantage of the three districts pests and their natural enemies in the time of occurrence and the number, the larger number of early spring the close planting area psyllid occurs, relatively abundant sand latent sparse plant area, scarab pests and Carabidae spiders natural enemies after autumn thin planting area psyllid amount, close planting area minimum. Accordingly, the major integrated pest management system establish discuss views. Three district total arthropod community, pest and natural enemy sub-community time dynamic system clustering. The results show that, in the same park, the pests and natural enemies in different temporal pattern, pest sub-communities influenced by its increase or decrease in the main pests in the community, and the natural enemy sub-communities relatively stable throughout the growing season in the comprehensive management of the pest can play an active role. Time dynamic clustering results of three zones arthropod community and pest sub-community differences are significant. Optimal split on arthropod communities, close planting area and fertilizer divisions are divided into six sections, Sparse divided into 7 sections. Liyuan different cultivation area major pests and their natural enemies community succession laws principal component analysis, three area until 6 or 7 principal components, the cumulative contribution rate to reach more than 85%, and in the three main districts before The main components play an important role in the types of pests and their natural enemies there are also significant differences. Major pests and their natural enemies community niche breadth and overlap analysis showed that larger niche breadth psylla in various districts and overlap value of most of the pests and their natural enemies, the district major pests and natural enemies community niche breadth and overlap there is a clear difference.

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CLC: > Agricultural Sciences > Plant Protection > Pest and Disease Control > Horticultural Crops Pest and Disease Control > Fruit tree pests and diseases > Pome pests and diseases > Pear pests and diseases
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