Caracterización química y biológica de un Hapludol bajo diferentes manejos

COVACEVICH F; ECHEVERRIA HE

Ciencia del Suelo

Asociación Argentina de la Ciencia del Suelo

Lugar: Ciudad Autónoma de Buenos Aires; Año: 2000 vol. 18 p. 144 - 148

0326-3169

 The aim of this work was to characterize chemical and biologically three productive soilsmanagement systems: conventional agriculture (AC), intensive livestock (GI) and organic livestock (GO). The determinations were made seasonally from spring 1998 until winter 1999, on three adjacent experimental plots at Balcarce, Argentina. The lowest pH values (5,3  ± 0,1) were found at the AC system. Both the available soil P and the organic matter (MO) decreased with soil depth. The lowest and highest soil P was found at the GO and AC, (9,8 ± 1,2 and 24,6 ± 4,7, respectively). However the MO was highest at GO and it was lowest at AC (6,6 ± 0,4 and 5,6 ± 0,2, respectively). The ammonium (NH4+) content was always low (1,39 ± 0,6). The mycorrhizal colonization was higher in orchardgrass and ryegrass plants (49,6 ± 12,4 and 29,2 ± 3,4, respectively) under GO than in orchardgrass and ryegrass plants (22,1 ± 12 and 20,0 ± 8,2, respectively) under GI. The mycorrhization was mostly negatively correlated with the available soil P and N-NO3-, but positively with the MO. Mycorrhizal colonization did not correlated with pH, N-NH4+, NBM nor with NOL