论文部分内容阅读
对安徽淮北棉田棉铃虫的空间分布动态规律进行了研究 ,结果表明 ,棉铃虫在棉田聚集程度基本上是随发生代次而逐渐增强的 ,发现不同代次虫口密度相近时理论抽样数明显不同 ,提出了淮北各代估值调查中的理论抽样数 ,并对几种空间格局模型拟合棉铃虫的空间分布情况作了比较
The dynamics of the spatial distribution of cotton bollworm in Huaibei cotton field in Anhui Province was studied. The results showed that the accumulation degree of cotton bollworm in cotton field was basically increased with the generation of cotton bollworm. The theoretical sampling numbers were obviously different when the density of cotton bollworm was similar in different generations. The theoretical sampling number in the valuation survey of each generation in Huaibei was put forward, and the spatial distribution of cotton bollworm in several spatial pattern models was compared