摘要
就河北平原山前地区包气带土体中的氮素循环转化及污染地下水的过程、包气带土体中反硝化细菌对硝酸盐转化的作用强度进行了试验研究。结果表明,生物反硝化作用是土壤包气带氮素转化的主要作用之一。该区包气带土体中由于有机物较少并随深度增加而减少,因此对NO-3细菌的反硝化作用强度也随深度加大而减弱,从而造成包气带土体中硝酸盐积累,进而污染地下水。如对包气带的有机碳源加以调控,可阻止地下水的污染。
The soil of unsaturated zone acts as a natural protector to groundwate r' quality, the denitrification is one of the most important roles on denitrifyi ng bacteria transform nitrogen in unsaturated zone of soil. With the developing of agriculture, the usage of fertilizer is growing steadily, the contamination o f nitrate in groundwater and wandering water becomes heavy and heavy. To learn t he degree of the denitrifying bacteria in unsaturated zone of soil and it's sign ificance to the protection of groundwater' quality, we carried out some experime nts and research about the cycle of nitrogen in unsaturated zone of soil and it' s contaminate process to groundwater, and the degree of the effect of denitrifyi ng bacteria to nitrate transformation in piedmont plain of Hebei.
出处
《农业环境保护》
CSCD
北大核心
2002年第3期254-256,共3页
Agro-Environmental Protection
基金
国土资源部基础研究项目(9501110-02)
环境地质开放实验室资助课题(K98014)
