|
(80-39) Soil microarthropods and organic matter as bioindicators of soil maintenance practices in vineyards. Renaud, Angelique*,1, Poinsot-Balaguer, Nicole1, 1 Faculte des Sciences et Techniques de St Jerome, Marseille cedex 20, France ABSTRACT- Since the last decades, social pressure about the environment, alarming observations concerning soil condition in French vineyards and the evolution of attitude among wine-grower have led to the development of sustainable viticulture. Indeed, there is a need to use soil bioindicators, to assess the impact of maintenance practices for weed management on soil biota in vineyards. In this experiment, we used soil microarthropod populations (acari and collembola) and the decomposition of organic matter (followed by the litter-bag method) to study the effects of four soil maintenance practices, respectively: weeds controlled with postemergence herbicides, weeds controlled with post and preemergence herbicides, natural flora cut mechanically and tillage. Abundance and diversity of acarina and collembola populations were significantly different between these practices, but did not showed the same tendency, indicating that they were more or less sensitive to disturbance. The decomposition of organic matter, analysed by the near infrared reflectance spectroscopy (NIRS), revealed interesting findings about the activity of microorganisms. Key words: microarthropods, organic matter, vineyards, bioindicators |
