Resumo

PENARETE M, Waldemar et al. Effect of biosolids application on soil physical properties of a sugarcane crop. Acta Agron. [online]. 2013, vol.62, n.3, pp.251-260. ISSN 0120-2812.

The effects of the biosolids applications on physical properties (bulk density, porosity and soil structural stability) in a soil of sugarcane crop and crop yield were evaluated. The experiment was carried out in the in the Cañaveralejo wastewater treatment plant at Cali, Colombia using a randomized complete block experimental design, two replications and eight treatments: (soil without biosolids application and without mineral fertilization (To), and soil with mineral fertilization (FM)), and six treatments with biosolids application to 100% and 200% of the dose required nitrogen by the crop as follows: BD100- BD200 dehydrated biosolids, BST100-BST200 thermally dried biosolids, and BA100-BA200 alkalinized biosolids. Results showed that significant differences were not found in soil physical properties and crop yield but trends to decrease the values of bulk density (1.33 Mg m^-3 to 1.29 Mg m^-3) and microporosity (48.8% to 45.8%), and to increase the values of structural stability (1.8 mm to 3.1 mm) and macroporosity (2% to 5%) were identified, which favor the water-air relation in the soil.

Palavras-chave : Bulk density; crop yield; porosity; structural stability; vertic properties.

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