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Effect of heat‐treating soil and straw on the subsequent adsorption of chlortoluron and atrazine
Author(s) -
EMBLING S.J.,
COTTERILL E.G.,
HANCE R.J.
Publication year - 1983
Publication title -
weed research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 74
eISSN - 1365-3180
pISSN - 0043-1737
DOI - 10.1111/j.1365-3180.1983.tb00559.x
Subject(s) - adsorption , chemistry , atrazine , straw , soil water , absorption (acoustics) , environmental chemistry , agronomy , pesticide , soil science , inorganic chemistry , organic chemistry , environmental science , materials science , biology , composite material
Summary The adsorption of chlortoluron and atrazine was measured on a range wheat straw residues that had been heated for periods of 1–5 min at temperatures up to 700°C and and on three soils that had been heated at up to 250°C for 1–5 min. Adsorption of both compounds by straw ash increased with increasing temperature of pretreatment. Atrazine adsorption by any of the soils was not changed markedly chlortoluron absorption was increased with two of the three soils. The results are discussed in terms of the changes in organic functional groups, that are likely to have been produced by the treatment, in relation to the adsorption mechanisms thatmay operate on the two compounds. Adsorption of chlortoluron by mixtures of ash and soil was less than the sum of the adsorption capacities of each component on its own in the cases of two out of three soils. It is concluded that the effect of straw burning on herbicide performance in the field will be variable but could be substantial. Le chauffage du sol et du chaume: influence sur l’adsorption ultérieure de chlortoluron et de l'atrazine