中文摘要：

基塘系统是一种种养结合、水陆互促的具有多种生态经济功能的低洼地复合生态农业系统，但随着区域经济特别是现代集约农业的发展，传统的基塘系统物质循环面临环境污染等威胁，调查表明广东顺德地区基塘系统中的HCHs是生态高风险区。本文探讨了基塘系统底泥农用过程中加快∑HCHs残留降解的生物修复效果，结果表明，种植空心菜在施用微量元素肥或有机肥的情况下，30d能使土壤中的∑HCHs减少77．-％～83．5％，75d将使底泥中残留率减少到3．0％左右，并使农用底泥达到GB 15618—1995规定的一级标准水平，证明施用有机肥或微量元素种植通心菜能加快清除土壤中的六六六污染物，是安全有效地利用底泥、实现基塘系统可持续发展的一种便捷的途径。

英文摘要：

The traditional dike-pond system （DPS） that has been developed and practiced in the Pearl River Delta for centuries is a sustainable agro-ecosystem in low-lying area. It has an obvious land-water interaction and remarkable eco-economical effect. However, severe environmental pollution has occurred since the late 1970s. Our investigation indicated the ∑HCHs pollution levels in some sediments of DPS were higher than the soil standard of China. The remediation of ∑HCHs residue in sediments of dike-pond system by growing Ipomoea aquatic and using different fertilizers was studied. A plot experiment was devised to compare the remediation effect of ∑HCHs by growing Ipomoea aquatic with using different types of fertilizers. The results indicated that compared to mineral fertilizer and organic-mineral combined fertilizer, organic fertilizer and microelement fertilizer had better remediation effects. The ∑HCHs in contaminated sediments would decrease by 77.0%-83.5% in 30 days, and the ∑HCHs residue was only 3.0% at 75th day by planting lpomoea aquatic with the applications of organic fertilizer or microelement fertilizer. The ~ HCHs in contaminated sediments was finally less than the 1st class standard of GB 15618-1995, and the content of ∑HCHs in the vegetable was less than 0.1 mg·kg^-1. In conclusion, soll itself possessed the potential for remediate ∑HCHs contaminated soil, and lpomoea aquatic planting with using organic fertilizer or microelement fertilizer could strengthen the remediation potential for ∑HCHs contaminated sediments and soil.