摘要
测定异色瓢虫成虫对桃蚜的捕食功能和空间异质性。结果表明:异色瓢虫成虫对桃蚜的捕食功能符合HollingⅡ模型,其244、8、72h的功能模型分别为Na24=1.021 5N/(1+0.004 06N)、Na48=1.065 0N/(1+0.003 62N)、Na72=1.037 3N/(1+0.002 12N),最大理论捕食量分别为251.892、94.124、90.20头;随着果荚数的增多,天敌对猎物搜寻过程中的环境阻力不断加大,捕食作用逐渐降低,捕食作用率同空间异质性呈现明显的线性负相关,其数学模型为y=83.833-10.100x。
The predation and spatial heterogeneity on Hamonia axyridis adult to Myzus persicae were determined. The results showed that the predation of Hannonia axyidis adult belonged to HollinglI Model, and the functional models of 24,48 and 72 hours were Na24 = 1.021 5N/（1 ＋0.004 06N）,Na4s = 1.065 0N/（1 ＋0.003 62N）and Na72 = 1.037 3N/（1 ＋0.002 12N） separately. The maximal predation of Hatmonia oxyridis adult was 251.89, 294. 12 and 490.20 heads. With the increase of the number of the gains, the environmental resistance increased when the natural enemy was hunting for the preys, and the predation efficiency was low when the spatial heterogeneity was complex. It displayed obvious lhiear negative relationship between the predation rate and the spatial heterogeneity, and the mathematical model was y = 83.833 - 10. 100x.
出处
《安徽农业科学》
CAS
北大核心
2007年第16期4750-4751,共2页
Journal of Anhui Agricultural Sciences
基金
合肥市科技局"无公害稻油生产技术研究开发"项目
关键词
异色瓢虫成虫
桃蚜
捕食功能
空间异质性
Harmonia axyridis-adult
Myzus persicae
Predation
Spatial heterogeneity
