| 蒋世铮*,任德新,张文忠,赛买提江.香梨园山楂叶螨种群动态的研究[J].植物保护,2012,38(4):54-56. |
| 香梨园山楂叶螨种群动态的研究 |
| Population dynamics of Amphitetranychus viennensis in Korla pear orchards |
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| DOI： |
| 中文关键词: 山楂叶螨 种群动态 香梨 |
| 英文关键词:Amphitetranychus viennensis population dynamics Korla pear |
| 基金项目: |
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| 中文摘要: |
| 采用聚集度指标分析了山楂叶螨聚集强度的时序变化，以指数模型进行拟合数量动态，运用最优分割法分析了山楂叶螨在香梨上的种群动态。山楂叶螨在香梨上的空间格局为聚集分布，分布的基本成分为个体群，聚集强度与叶螨的密度有关。山楂叶螨在香梨上呈指数增长，模型为Nt=15.199 4e-0.054 t（R=0.913 2*）；将山楂叶螨种群动态划分为3个阶段：发展期、高峰期和衰退期。 |
| 英文摘要: |
| The population dynamics of Amphitetranychus viennensis（Zacher） in Korla pear orchards was studied. The aggregating intensity was determined by using aggregating index. A mathematical model of population development dynamics was built by using the optimal partitioning method. The results showed that the spatial pattern of the spider mite on pear trees belonged to the aggregated distribution and the basic unit of the distribution was colonies. The aggregating intensity was positively correlated with the population density. The development of the population fitted the exponential model, Nt=15.199 4e-0.054 t(R=0.913 2**）and could be divided into three phases, namely developing, peak and recession phases. |
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