Physical properties of a humic cambisol under tillage and cropping systems after twelve years

Revista Brasileira de Ciência do Solo

Andréia Patrícia Andrade¹  Álvaro Luiz Mafra²  Gizele Rejane Baldo²  Cristiano Dela Piccolla²  Ildegardis Bertol¹  Jackson Adriano Albuquerque¹ 

[1] ,Universidade do Estado de Santa Catarina - UDESCLages SC

关键词: crop rotation;    crop succession;    no-tillage;    soil management;    manejo do solo;    rotação de culturas;    semeadura direta;    sucessão de culturas;   

DOI  :  10.1590/S0100-06832010000100022

来源: SciELO

【 摘 要 】

Soil is the basis underlying the food production chain and it is fundamental to improve and conserve its productive capacity. Imbalanced exploitation can degrade agricultural areas physical, chemical and biologically. The objective of this study was to evaluate some soil physical properties and their relation with organic carbon contents of a Humic Dystrudept under conventional tillage (CT) and no-tillage (NT), for 12 years in rotation (r) and succession (s) cropping systems. The experiment was carried out in Lages, SC (latitude 27 º 49 ' S and longitude 50 º 20 ' W, 937 m asl), using crop sequences of bean-fallow-maize-fallow-soybean in conventional tillage rotation; maize-fallow in conventional tillage succession; bean-oat-maize-turnip-soybean-vetch in no-tillage rotation; and maize-vetch in no-tillage succession. The experimental design was completely randomized with four replications. The soil samples were collected in the layers 0-2.5, 2.5-5, 5-10, and 10-20 cm. The following properties were analyzed: soil density, porosity, aggregate stability, degree of flocculation, water retention, infiltration, mechanical strength, and total organic carbon. Soil aggregation in the surface layer (0-5 cm) was better in the no-tillage than the conventional system, related to higher microporosity, organic carbon contents and water retention capacity, indicating that a periodical tillage of this soil is unnecessary. Infiltration was highest in no-tillage with crop succession.

【 授权许可】

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