【摘要】 研究了油菜田看麦娘的空间格局及取样技术。结果表明其分布为聚集分布，且属于一般的负二项分布。其理论抽样模型为：ｎ＝１．８＋６９．２／ｘ，田间抽样以五点取样和棋盘式取样为佳，抽样数量以５０抽样单位（０．１１ｍ２）为宜，抽样精度可达９６．５％。更多还原

【Abstract】 The spatial distribution and sampling technique of Alopecurus aegualis were studied inrape field.The results of field investigation and statistical analysis indicated that the distribu-tion of Alopecurus aegualis assumed aggregative pattern,which belongs to negative binomialdistribution,the sampling model was n=1.8+59.2x,five points and chess board sam-pling were the best in field.The adequate sampling size was 50 sampling unit(0.11m2),sampling precision was 96.5%.更多还原