Impact Of Lindane And DDT On Eisenia Foetida,Soil Nematode And Study Of The Residue In Soil

Lindane and DDT are typical Persistent Organic Pollutants that have been used as pesticides in China for long period and that have caused extensive pollution. In the research Lindane and DDT have been selected as the representatives of Persistent Organic Pollutants. Deltamethrin and carbofuran has been chosen as contrasting. The acute toxic effect and subtle toxic effect to the Eisenia foetida of four kinds of pesticides in different concentrations were studied. And the impact on physiological indexes, such as Eisenia foetida's growth , movement ability, etc. Damage to the micro-structure of Eisenia foetida ultra, with the electron microscope was studied. The residue level and degradation of Lindane and DDT in the soil were detected. The results are as follows:1.In the acute toxic experiment, LC50 to Eisenia foetida of Lindane DDT Deltamethrin and carbofuran are 158.06mg kg-1, 880.74 mg kg-1 131.86 mg kg-1 3.48 mg kg-1 respectively. Four kinds of pesticides have all influenced the growth of Eisenia foetida seriously. The weight of Eisenia foetida presents the downward trend in the toxic experiment. The movement ability of Eisenia foetida which is affected by pesticide drops. At the same time, skin color dull, long and thin health have, breeding and the development were suppressed.2.Observing by optics microscope and electron microscope show that: the skin muscle is being received on his epidermis muscle and alimentary canal destroyed after the soil is polluted by the four kind of pesticides. At the same time the cell device in some cells is damaged seriously.3.It is exert through cultivated in a pot experiment cultivation for two month Lindane and DDT original pesticide experiment after two month to get soil examine appearing value very low to find to observe.Soil sampled form J and N farm which have used Lindane and DDT for 40 years, the analysis result showed that the residue of the two pesticides are very high.Lindane remains and reaches as high as 996.06 g kg-1, and DDT is 3382.75 g kg-14. Lindane DDT Deltamethrin and Carbofuran to exert a certain influence to soil nematode density, nematode community structure in being cultivated in a pot and experimental, but not a decisive factor.