摘要
采用现场采集土壤样品,农药染毒的模拟试验方法,研究了乙草胺对中型土壤动物生物多样性的影响。结果表明,经染毒处理的土样中,弹尾目和甲螨亚目计510只,与对照组比较,土壤动物个体数量显著减少,与乙草胺处理浓度呈明显负相关。染毒试验结果表明,土壤动物的数量随农药处理浓度的递增而显著减少,其中以弹尾目和甲螨亚目对乙草胺最为敏感。
An experiment on biodiversity of mesofauna in soil receiving acetochlor was conducted in this investigation. We collected 792 soil animals, which subordinates to 3 Phyla, 5 Classes that Collembola and Acarina are dominant population, accounting for 87.37% of the total animals, while the rest are either averaged or rare in population. Among acetochlor polluting soil samples, there were 510 individuals. Compared with the control soil sample, the species and the amount of soil animals were remarkably decreased. With increase of acetochlor concentration in the soil, the species and quantities of soil animals decreased, respectively, from 35 species and 180 individuals at low concentration (0.54 mL·L-1) to only 30 species and 113 individuals at high concentration (3.2 mL·L-1), representing the diversity index of 3.1695, 3.2451 and 3.3163 for 3.2 mL·L-1, 0.54 mL·L-1 and control sample, respectively. The results from simulating experiments on acetochlor to soil animals showed that the herbicide exhibited an obvious effect on soil animals, while the amount of soil animals were decreased with the increase of acetochlor treating dose in which Collembola and Acarina were particularly sensitive to the herbicide. Accordingly, soil animals may be regarded as an indicative organism in monitoring the herbicide pollution. This experiment showed that the effects of acetochlor was less than that of other pesticides on species diversity of soil mesofauna community according to other literature, and the connection between the long exposure period and species diversity of soil mesofauna community is being developed in our lab.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2005年第3期576-580,共5页
Journal of Agro-Environment Science
基金
浙江师范大学优秀中青年骨干教授资助项目
