THE FATE OF GLYPHOSATE IN SOIL AND WATER

Suwardji, Suwardji (2018) THE FATE OF GLYPHOSATE IN SOIL AND WATER. S3 thesis, upt. perpustakaan.

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Abstract

Glyphosate, the active ingredient of the herbicide Roundup and others is widely used to control a wide range of perennial and annual weeds. The chemical structure of this compound is presented in the Figure 1. Glyphosate has been reported to be rapidly inactivated when in contact with mineral and organic soils (Sprankle et al, 1975; Suwardji, 1998), and this rapid inactivation of glyphosate in soil has been suggested to be a result of rapid adsorption to soil constituents. O HO - OC - CH2 - NH - CH2 - P---OH  OH Figure 1. Chemical stucture of glyphosate In a study of behaviour of glyphosate residue in soil using bioassay plants, Sprankle et al. (1975a) found that the application of 56 kg ha-1 glyphosate on clay loam and muck soil did not significantly reduce the dry weight of wheat. The dose used in this experiment was 25 times of the proposed dosage normally used to control weeds. Similar results have been reported by other authors (Moshier et al. 1976; Moshier & Penner 1978a; Klingman & Murray 1976; Egley & William 1978; Blower et al. 1985). As the roots of plant have been reported to be unable to absorb glyphosate (Hance 1976), low activity of glyphosate in soil in these studies may be due to the combination of moderate adsorption and low acropetal uptake of this compound when applied to the root (Hance 1976). Due its strong adsorption of this compound when in contact with the soil constituents and rapid degradation in soil and water, it is generally believed that this compound is considered to be an environmentally safe. This paper will discuss the fate of glyphosate in soil and water and foccus will be given to its interaction with soil constituents, and its movement in soil profile as well as its degradation in soil and environment.

Item Type: Thesis (S3)
Subjects: S Agriculture > S Agriculture (General)
Divisions: Fakultas Pertanian
Depositing User: Wiwin Kartikawati
Date Deposited: 29 Mar 2018 04:02
Last Modified: 29 Mar 2018 04:02
URI: http://eprints.unram.ac.id/id/eprint/1834

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