摘要
本文通过频次分布法、扩散型指数法、Ｔａｙｌｏｒ指数法等多种方法综合分析模拟，测知水稻螟害白穗在田间呈嵌纹分布，可用负二项式或截尾负二项式显著模拟。螟害白穗在田间一切密度下均呈聚集分布，其聚集程度随种群密度升高而增大。螟害白穗在田间分布基本成分为个体群，理论适宜抽样大小为３×３＝９（穴），田间正确的抽样方法是Ｚ型抽样法。
In 1994,general survey of the rice borer white head is applied in nine rice fields. By using the method of frequeney distribution and the other’s,the distribution of the white head belongs to the vein form. It can be modeled by the negative binomial distribution. The white heads reveal the assemble distribution in every borer density. The gathering strengthen by the increasing of the density. The individuality group is basic. And the appropriate sample is nine rice stubbles(3*3). The correct sample method is ‘Z’ form. The theortical sample number is also reported in the paper.
出处
《植保技术与推广》
1997年第3期7-9,共3页
Plant Protection Technology and Extension
关键词
水稻
螟害白穗
分布型
抽样技术
rice borer white head distribution form sampling technique
