Treatment of an acid soil with bentonite used for wine fining: effects on soil properties and the growth of Lolium multiflorum.

摘要: When used to fine wines, bentonite acquires a protein load that makes it potentially useful fertilizer. Other properties of are also for soil amendment. In the work described in this paper, waste from winery was applied an acid soil, and its effects on growth Lolium multiflorum were evaluated. Soil N, K, P contents all increased, as did pH cation exchange capacity. Biomass production increased dose up 5 g kg-1, decreasing at larger doses (possibly result falling potassium/magnesium ratio increasing electrical conductivity). Environmental drawbacks include high soluble copper content, although conversion less forms reduces potential phytotoxicity. The copper, manganese, zinc ryegrass crop low. Keywords: Bentonite; sludge; amendment; nutrients