EFFECTS OF THE HERBICIDE ALACHLOR ON SOIL MICROBIAL ACTIVITIES

被引：22

作者：

POZO, C

SALMERON, V

RODELAS, B

MARTINEZTOLEDO, MV

GONZALEZLOPEZ, J

机构：

[1] UNIV GRANADA,FAC PHARM,DEPT MICROBIOL,NITROGEN FIXAT GRP,E-18071 GRANADA,SPAIN

[2] UNIV GRANADA,INST WATER RES,E-18071 GRANADA,SPAIN

来源：

ECOTOXICOLOGY | 1994年 / 3卷 / 01期

关键词：

ALACHLOR; HERBICIDES; PESTICIDES; SOIL BACTERIA; ENZYMATIC ACTIVITIES;

D O I：

10.1007/BF00121384

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

A study was made of the effects of one selected acetanilide herbicide, alachlor, at concentrations of 2.0-10.0 kg ha-1 on bacterial populations, fungi, dinitrogen fixation bacteria, denitrifying bacteria, nitrifying bacteria, nitrogenase activity, acid and alkaline phosphatases, arylsulfatase and deshydrogenase. The presence of 2.0-10.0 kg ha-1 of alachlor in the soil increased the total number of bacteria and fungi. The population of denitrifying bacteria increased significantly at concentrations of 5.0-10.0 kg ha-1. However, aerobic dinitrogen fixing bacteria and nitrogenase activity decreased at alachlor concentrations of 3.5-10.0 kg ha-1. Acid and alkaline phosphatases, arylsulfatase and dehydrogenase activity decreased significantly initially at concentrations of 5.0-10.0 kg ha-1, but recovered to levels similar to those in the control. Nitrifying bacteria were not affected as a consequence of the addition of the herbicide to agricultural soil.

引用

页码：4 / 10

页数：7

共 17 条

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