NDLI: Distribution of Organo-Chlorine Pesticides (DDT and HCH) Between Plant and Soil System

Content Provider	Springer Nature Link
Author	Feng, K. Yu, B.Y. Wang, X.L. Ge, D.M. Wang, X.Z. Wong, M.H. Cao, Z.H.
Copyright Year	2004
Abstract	This paper reports a study of the distribution of organo-chlorine pesticides (DDT and HCH) between rice plants and the soil system by spraying before the heading stage at four different dosage levels – control, normal dosage (15 kg ha−1 of 6% HCH and 7.5 kg ha−1 of 25% DDT), double dosage and four times dosage. Soil and plant samples were taken respectively at the 1st h, 3rd, 10th, 20th, and 40th day after spraying and at the harvest time. The results indicate that less than 5% of HCH and 15% of DDT were absorbed by the surface of rice leaves for normal dosage. Most of both pesticides moved into the soil in solution after spraying. Compared with DDT, HCH was degraded and run off more easily. HCH residues in the surface soil layer (1–3 cm) were already below 6.4 μg kg−1 at the mature stage, lower than Chinese Environmental Quality Standard for Agricultural Soils: HCH <0.05 mg kg−1. However DDT residues in the surface soil layer remained 172 μg kg−1, higher than the national standard: DDT <0.05 mg kg−1. According to the test f OCP residues in rice seeds, it can be concluded that the OCP sprayed onto the surface of rice leaves can move into rice plants and accumulate in the seeds at the mature stage. HCH residues in rice seeds of the double and four times dosage treatments, and DDT residues in all treatments, exceeded the Chinese National Food Standard (HCH <0.10 mg kg−1, DDT <0.20 mg kg−1).
Starting Page	253
Ending Page	258
Page Count	6
File Format	PDF
ISSN	02694042
Journal	Environmental Geochemistry and Health
Volume Number	26
Issue Number	2
e-ISSN	15732983
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2004-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Geochemistry Public Health/Gesundheitswesen Atmospheric Protection/Air Quality Control/Air Pollution
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Medicine Geochemistry and Petrology Environmental Engineering Water Science and Technology

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