Fractions of particulate and mineral nitrogen in soil managed under voisin rational grazing

Abstract

Intensive use and inadequate pasture management practices have hindered the sustainability
of livestock farming. Raising voisin (PRV) is a management system that, when perfected with
the planned and careful introduction of silvicultural technology, tends to increase the potential
of production and environmental preservation. The objective of this work was to evaluate soil
quality in PRV grasses (PRVCA) compared to PRVSA and a native forest area (FN), using nitrogen
(N) fractions of the Material Soil organic matter (MOS). The research was developed in
the municipality of Redentora - RS, in an area of 4.6 hectares. Soil samples were collected at
depths of 0-5, 5-10 and 10-20 cm, and in these evaluated the contents of total nitrogen (NT) of
the soil and the particle size fractionation of MOS, obtaining the particulate NO (NOp) And NO
associated with minerals (NOam). The highest levels of NT, NOP and NOam were evidenced
in the forest area. In the PRV, the PRVCA presented higher levels of NOp at 0-5cm and did not
differ for the Noam at 5-10 cm, compared to the PRVSA. PRVCA improves soil quality compared
to PRVSA, as it increases NOp levels in the soil surface layer.Intensive use and inadequate pasture management practices have hindered the sustainability
of livestock farming. Raising voisin (PRV) is a management system that, when perfected with
the planned and careful introduction of silvicultural technology, tends to increase the potential
of production and environmental preservation. The objective of this work was to evaluate soil
quality in PRV grasses (PRVCA) compared to PRVSA and a native forest area (FN), using nitrogen
(N) fractions of the Material Soil organic matter (MOS). The research was developed in
the municipality of Redentora - RS, in an area of 4.6 hectares. Soil samples were collected at
depths of 0-5, 5-10 and 10-20 cm, and in these evaluated the contents of total nitrogen (NT) of
the soil and the particle size fractionation of MOS, obtaining the particulate NO (NOp) And NO
associated with minerals (NOam). The highest levels of NT, NOP and NOam were evidenced
in the forest area. In the PRV, the PRVCA presented higher levels of NOp at 0-5cm and did not
differ for the Noam at 5-10 cm, compared to the PRVSA. PRVCA improves soil quality compared
to PRVSA, as it increases NOp levels in the soil surface layer.