Effect of Leucaena leucocephala on structure and content of dry matter in the soil of two cattle rearing units in Villa Clara, Cuba
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Abstract
“Victoria de Santa Clara”, both in fluffy brown carbonated soil. In the first, four treatments were established: treatment 1 (natural grass), treatment 2 (Leucaena leucocephala, with five years of establishment), treatment 3 (Leucaena leucocephala, with four years of establishment), and treatment 4 (permanent banana crop). In the second experiment, three treatments were
developed: treatment 1 (Leucaena leucocephala, with three years in a rotational grazing system), treatment 2 (Leucaena leucocephala, with eight years in a rational system), treatment 3 (natural grass). Samples were taken for the analysis of organic matter and structure indicators (structure factor, stable aggregates, permeability, plasticity limits) at 0-10, 10-20 and 20-40 cm
deep. The experimental designed was completely random blocks design. Results indicate that Leucaena influence, at a long term, on the content of organic matter, as a tree or integrated to the silvopastoral system (adjustment curve R2 0.82-0.92), as well as on the structure factor, stable aggregates and permeability, with values superior to 65 % (good), 70 % (excellent) and 2.00 log 10k (excellent), respectively.
Key words: soil management, legume, structure, organic matter
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