摘要
运用地质统计学中的变异函数对水稻不同季度、不同生长期中褐飞虱若虫田间种群空间结构进行分析表明，褐飞虱若虫田间种群的空间分布为聚集型。在晚稻生长中、晚期，褐飞虱若虫的聚集程度分别为５３％和３１．６％，聚集斑块范围分别为２７ｍ和２４ｍ。在早稻生长的早、中和晚期，褐飞虱若虫的聚集程度分别为４２．６％，４８．９％和５７．２％，聚集斑块范围均大于６０ｍ。空间分布模拟图能较好地反映褐飞虱若虫在田间的具体分布情况。
Brown planthopper (BPH), Nilaparvata lugens is an important pest of rice. The spatial distribution of the nymphs, in different rice growing seasons, was studied with geostatistical methods. It was shown that the nymphs population distributed in a clump pattern in rice fields. In late rice season, the clumped degrees were 53% and 31.6%, and the clumped range was 27 m and 24 m, in different times. In early rice season, the clumped degrees were 42.6%, 48.9%, and 57.2%, and the clumped range was more than 60 m.
出处
《西南农业大学学报（自然科学版）》
CSCD
1998年第5期450-455,共6页
Journal of Southwest Agricultural University
基金
"九五"国家重大科技攻关计划资助
广东省自然科学基金
国家教委重点项目
