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通过对以株和区组面积两种抽样单位 ,以随机取样和定点定株取样两种抽样方式下叶菜田节肢动物多样性测度的变异程度分析表明 ,在菜心田苗期以区组 (0 .11m2 )为抽样单位 ,定苗后生长期～成熟期以株为抽样单位 ,采用随机抽样方式所获得的调查结果变异程度较小 .在此基础上 ,通过对菜田节肢动物丰富度、多样性和均匀性等指标同样方数量间的关系分析表明 ,苗期、生长期、成熟期分别抽取 12、30、2 0个样方 ,可以达到各多样性测度相对稳定的程度 .据此 ,确立了菜心田节肢动物类群多样性的最佳抽样单位、抽样方式和抽样量 .
By analyzing the degree of variation of arthropod diversity in leafy vegetable fields under random sampling and fixed-point sampling with two sampling units of strain and block area, .11m2) was taken as sampling unit, and the result of random sampling was less variation in the sampling period after the growth and mature stage of Dingmiao.According to the results of the study on the richness, diversity and The analysis of the relationship between the same number of indicators, such as uniformity, showed that 12,30,2 0 quadrats were drawn at the seedling stage, the growth stage, and the maturity stage, respectively, so that the relative stability of each measure of diversity could be achieved. The optimal sampling unit, sampling method and sampling amount of the diversity of the arthropod population in the heart field.