| 稻负泥虫幼虫空间分布型及其在实践上应用的研究 |
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| 引用本文： | 赵士熙,吴中孚.稻负泥虫幼虫空间分布型及其在实践上应用的研究[J].福建农林大学学报(自然科学版),1985(3). |
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| 作者姓名： | 赵士熙 吴中孚 |
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| 作者单位： | 福建农学院植物保护系，福建农学院植物保护系 |
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| 摘 要： | 通过测定聚集度指标研究稻负泥虫的空间分布型,结果表明:1、幼虫分布型是聚集分布;2、根据 m~*～m 的回归关系,可得线性回归方程 m~*=3.164+1.347m(r=0.890~**),属于聚集分布。比较了植保上常用的四种抽样方式,均适用于田间调查。文中分析并计算了田间调查的理论抽样数,估计了抽样精确度。结果表明,幼虫的种群密度愈高,理论抽样数就愈少;密度愈低,理论抽样数就愈多。
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STUDIES ON THE SPATIAL DISTRIBUTION PATTERN OF THE LARVAE OF RICE LEAF BEETLE AND ITS PRACTICAL APPLICATION |
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| Abstract: | The paper deals with the spatial distribution pattern of the larvae of rice leaf beetle by means of determining aggregated indices.The results are as follows: (1)All indices of aggregation indicate that the distribution pattern of the larvae belongs to the aggregated distribution patterns. (2)Following the regression reation of m~*-m,the linear regression equation which is m~*=3.164+1.347m(r=0.890~(**))was obtain.It falls under the pattern of the aggregated distribution. Based on the investigation and study of the spatial distribution pat- terns,four common sampling methods in plant protection were compared in this paper.They proved quite effective on the field survey. We analysed and calculated the theoretical sampling number of field survey,and estimated sampling precision.The results showed that the higher the population density of the larvae,the less is the theoretical number of sampling clumps;the lower the density,the more is the sampling. |
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