NONTARGET EFFECT OF HERBICIDES .1. EFFECT OF GLYPHOSATE AND HEXAZINONE ON SOIL MICROBIAL ACTIVITY - MICROBIAL-POPULATION, AND INVITRO GROWTH OF ECTOMYCORRHIZAL FUNGI

被引:38
作者
CHAKRAVARTY, P [1 ]
CHATARPAUL, L [1 ]
机构
[1] ENVIRONM CANADA, CANADIAN FORESTRY SERV, PETAWAWA NATL FORESTRY INST, CHALK RIVER K0J 1J0, ONTARIO, CANADA
来源
PESTICIDE SCIENCE | 1990年 / 28卷 / 03期
关键词
D O I
10.1002/ps.2780280302
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
The effects of two herbicides, glyphosate (as a 359 g litre−1 SL) and hexazinone (as a 50gkg−1 granule) on soil microbial population, carbon dioxide evolution, and in‐vitro growth of five species of ectomycorrhizal fungi were investigated. Glyphosate at 0–54 and 3.23 kg a.i. ha−1 and hexazinone at 1. 2 and 8 kg a.i. ha−1 did not reduce soil microbial population or carbon dioxide evolution in the long term (6 months). However, there was a significant short‐term (2 months) effect of glyphosate on both fungal and bacterial counts at the 0.54 kg ha−1 treatment. In in‐vitro tests, Cenococcum graniforme. Hebeloma crustuliniforme and Laccaria laccata were more susceptible to both herbicides than was Suillus tomentosus. which was, in turn, more susceptible than Paxillus involutus. The growth of all five ectomycorrhizal fungi was significantly reduced when subjected to concentrations above 50 μl formulation litre−1 (glyphosate) or 50 μg formulation litre−1 (hexazinone). Copyright © 1990 Wiley Periodicals, Inc., A Wiley Company
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页码:233 / 241
页数:9
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