Abstract

SANCHEZ HERNANDEZ, Rufo et al. Cambios en las propiedades físicas de un suelo arcilloso por aportes de lombricompuesto de cachaza y estiércol. INCI [online]. 2005, vol.30, n.12, pp.775-779. ISSN 0378-1844.

Rates of 0, 20, 40 y 60Mg·ha-1 of a vermicomposted mixture of filter cake vermicompost and bovine manure (1:1) were added to a clay soil to evaluate the effects on its physical properties. The vermicompost addition took place in Jan 2003. The soil was kept without tillage during 18 months. Sampling was made in Jun 2004. Bulk density, dry aggregate stability, wet aggregate stability and soil total carbon were measured. The structure and macroaggregates were visualized through thin section techniques and microscopy. Bulk density decreases by the increasing of the vermicompost rate (r2= 0.09945, p=0.06). In thin sections a change in the structure of the soil surface was observed in both 40 and 60Mg·ha-1 treatments; both in amount of macroaggregates and in porosity. The size distribution of wet aggregates indicates that there are more stable macroaggregates in soil treated with high amendment rates. The lowest carbon concentration was found in microaggregates (<250µm), while the highest carbon concentration was present in small macroaggregates

Keywords : Abono ; Enmiendas Orgánicas ; Estabilidad de Agregados ; Suelos Arcillosos .