野燕麦(Avena fatua L.)是麦田恶性杂草,1986年我们对其空间分布型、确定最佳抽样方法和理论抽样数进行了研究。现将结果整理如下: 一、研究方法 (一)田间调查:选择有代表性的长方形麦田5块(A、B、C、D、E),每块60亩,并等分3段,各20亩,共计15块田;于年前杂草萌发高峰后(20—22/12)进行调查,采取顺序两级抽样法调查,即每块田从四角开始,顺垄每走20步查1点,每点0.1m~2共查10点,每块田20垄,共查200点,并按顺序将点内的野燕麦株数记入方格纸上,并分别计算其总和(∑x)、平方和 (∑X~2)、平均数(X)和方差(V),结果见 Avena fatua L. is a vicious weed in wheat field. In 1986, we studied its spatial distribution, determination of the best sampling method and theoretical sampling. The results are organized as follows: First, the research methods (A) field survey: Select a representative rectangular wheat field 5 (A, B, C, D, E), each 60 acres, and is divided into 3 sections, each 20 Mu, a total of 15 fields; in the year before the peak of weeds germination (20-22 / 12) to investigate the order of two sampling method to investigate, that each field from the four corners, , Each point of 0.1m ~ 2 total of 10 points, each ridge 20 ridge, a total of 200 points were investigated, and in order to point the number of wild oats recorded on the grid paper, and were calculated their sum (Σx) Sum of squares (ΣX ~ 2), average (X) and variance (V), the results see