溴氰菊酯在模拟河蟹稻田养殖系统中的归趋性研究

Distribution of Deltamethrin in Simulated Rice Field System of Chinese Mitten Crab(Eriocheir sinensis)

[目的]建立模拟稻田养殖系统,研究溴氰菊酯在生态系统中的代谢及分布。[方法]采用HPLC测定水体、土壤、水稻根、河蟹肝胰腺及血浆等不同样品中溴氰菊酯的残留量及在环境中的分布和消除规律。[结果]试验结束时,溴氰菊酯在水体中残留量低于检测限;底泥中残留量高达1 500.48μg/kg,消除半衰期长约104 d。[结论]溴氰菊酯肝胰腺组织中的残留量大于血浆组织中的残留量,易在河蟹肝胰腺内积累,其残留量具有组织差异性。

[ Objective ] The aim of this study is to establish a simulated rice farming system to study the metabolism and distribution of delta-methrin in the ecosystem. [ Method] The residues of deltamethrin in different samples of water, soil, rice root, c r a b, h e p a topancreas a n d plasma and their distribution and elimination in the environment were determined by HPLC. [ Result] At the end of the test,the residual a-mount of deltamethrin in water was lower than the detection limit, and the residue in the sedimentwas about 104 d. [ Conclusion] The residual amount of deltamethrin in the hepatopancreas was greater than that in the plasma tissue. It was easy to accumulate in the hepatopancreas of the river crab. The residual amount of the liver and pancreas was different from that of the tissue.