Effect of Multiple Stresses, Organic Amendment and Compaction, on the Fate and Impact of Isoproturon in Soil

Abstract

Organic matter decline and compaction are two major processes of soil degradation. Organic amendment is a current practice to compensate the loss of organic matter, which could in addition contribute to increase soil aggregate stability and limit compaction. Therefore, the objective of this work was to study the effect of multiple physico-chemical stresses, organic amendment (compost of sewage sludge and green waste) addition and soil compaction, on the fate and impact (measured through the urease enzyme activity) of isoproturon. Compost addition and compaction did not significantly affect the fate and impact of isoproturon. The lack of effect of compost can be due to the delay between soil sampling and soil amendment. Compaction had no effect probably because the porosity reduction does not affect the habitable pore space accessible to degrading microorganisms. Nevertheless, isoproturon significantly increased the urease enzyme activity in compacted and not compacted unamended soils contrary to the amended ones. It seems that the organic amendment could act as a buffer with regards to the impact of isoproturon. The results obtained in this work suggest that, in general, the fate and impact of isoproturon in soils will not change following compaction and/or organic amendment addition, neither the corresponding risks for the environment.

Statistical Evaluation of Quantities Measured in the Detection of Soil Air Pollution of the Environmental Burden

“…References [36,37] attempted to illustrate the importance of using passive soil air as an innovative investigation technique in the assessment of soil and groundwater pollutions that emanates from volatile hydrocarbon activities in industrial countries.…”

Accelerated Dissipation of Two Herbicides after Repeated Application in Field Experiments with Organically-Amended Soil

“…The composted organic residues applied to soils as amendments to increase the organic matter (OM) in soils with content <1% is a common agricultural management practice which improves soil fertility and quality, as well as crop yields [1]. The organic residues applied to soil as amendments have a high content of organic carbon (OC) and dissolved organic carbon (DOC), which may modify the dynamics (adsorption, mobility, and degradation) of pesticides applied simultaneously to combat pests and diseases [2][3][4]. The OC content has been positively correlated with the adsorption of hydrophobic compounds with high affinity by organic soil components and amendments [5,6], although functional groups of OC from amendments are also important factors controlling the adsorption-desorption of pesticides by amended soils [6].…”