三氯乙酸在土壤及小麦、玉米植株中的残留动态研究

本研究通过大量的田间试验和盆栽试验,对不同时期土壤和植株中三氯乙酸残留动态进行了观察,发现在试验条件下三氯乙酸在田间土壤中最长可持留7个月;在作物的整个生长期中,以三叶期植株中三氯乙酸检出量最高,随生长期的延长,植株中三氯乙酸检出量迅速减少,但最终仍可从成熟的籽实中检出微量三氯乙酸.本文阐述了影响作物对三氯乙酸吸收的若干因素,并对土壤中三氯乙酸残留量与植株中三氯乙酸检出量的关系进行了简单的数学处理,可供有关人员在研究土壤中农药及其它有机污染物对农作物毒害问题时参考.

STUDY ON TCA RESIDUE BEHAVIOUES IN SOIL, WHEAT AND CORN

TCA residue in soil, wheat and corn plants in different periods was studied by field and pot experiment. Result obtained showed that TCA could be kept in the soil under field condition for seven months; the highest TCA content was detected in seedling (trifoliate) stage of the plant, TCA content decreased ripadly with the plant growing, and a very small amount of TCA was detected in seed. Discussion is made on the factors affecting absorption of TCA by crops and the relationship between TCA residue in soil and TCA content in plant.