| 分布型指数法及抽样技术在甜菜田草地螟幼虫预测预报中的应用 |
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| 引用本文： | 陈静,王芙兰,胡梅芳,何增国. 分布型指数法及抽样技术在甜菜田草地螟幼虫预测预报中的应用[J]. 中国糖料, 2012, 0(4): 33-34,36 |
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| 作者姓名： | 陈静 王芙兰 胡梅芳 何增国 |
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| 作者单位： | [1]甘肃省古浪县种子管理站,古浪733100 [2]甘肃省古浪县农业技术推广中心,古浪733100 [3]甘肃省古浪县古浪镇农技站,古浪733100 |
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| 摘 要： | 经6块甜菜田的聚集度指标测定结果表明,草地螟幼虫在甜菜田属聚集分布。经Iwao回归拟合,(,P<0.01),式中的组合说明草地螟幼虫在田间的分布属聚集分布中的奈曼分布,结果和聚集度指标测定结果相吻合。4种取样方法与抽样总体比较,以双对角线抽样法误差最小,代表性好,宜在大田调查时采用。草地螟幼虫不同虫口密度所需最大抽样量由:给出。
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| 关 键 词： | 甜菜 分布型指数 抽样技术 草地螟幼虫 预测预报 |
Application of Distribution Type Index and Sampling Technique on Forcast of Loxostege sticticalis Larvae in Beet Field |
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| CHEN Jing,WANG Fu-lan,HU Mei-fang,HE Zeng-guo. Application of Distribution Type Index and Sampling Technique on Forcast of Loxostege sticticalis Larvae in Beet Field[J]. Sugar Crops of China, 2012, 0(4): 33-34,36 |
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| Authors: | CHEN Jing WANG Fu-lan HU Mei-fang HE Zeng-guo |
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| Affiliation: | 1. Seed Control Station of Gansu Gulang, Gulang 733100, China;2. Gulang Extension Centre of Agricultural Technology, Gulang 733100, China; 3. Gulang Extension Station of Agricultural Technology, Gulang 733100, China) |
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| Abstract: | The results from 6 beet fields showed that Loxostege sticticalis larvae in the beet field were a clumped distribution. The error of double diagonal method in comparison with the other 4 sampling methods was minimum and representative, and it is suitable for field investigation. The sampling number of Loxostege sticticalis larvae population density, n=32.6525√x-0.2925. |
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| Keywords: | beet distribution type index sampling technique Loxostege sticticalis larvae forcast |
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