PLANT BIOAVAILABILITY OF NATURAL AND MODEL HUMIC ACID-BOUND [14C] ATRAZINE RESIDUES

被引:8
作者
BERTIN, G
SCHIAVON, M
POTTIER, C
机构
[1] E.N.S.A.I.A. Service Protection des Cultures, 2 Avenue de la Forêt de Haye, 54505 Vandoeuvre ced
关键词
atrazine; bioavailability; Bound residues; maize; model humic acids;
D O I
10.1080/02772249009357547
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The release of bound [14C] atrazine residues and their uptake by maize plants was investigated. “Natural” humic acids, extracted from a brown soil, and “model” humic acids, prepared from catechol, both containing bound [14C] atrazine residues were incubated with plants in soil. After 21 days, the maize plants contained 0,7% (plants grown in soil mixed with “natural” humic acids) to 1.7% (plants grown in soil mixed with “model” humic acids) of the radioactivity originally introduced. The roots contained 55 to 70% of the [14C] residues whereas the remainder was present in the shoots. A significant amount of the total [14C] residues (29 to 53%) became again bound in plant tissues, whereas the, majority of extractable [14C] residues was present in the form of conjugates. The behaviour of “model” humic acid-bound residues was comparable to that of “natural” humic acid-bound residues or soil-bound residues. © 1990, Taylor & Francis Group, LLC. All rights reserved.
引用
收藏
页码:203 / 210
页数:8
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