The presence of trees in the pastures can bring several benefits to both the animals and to the soil under their influence.Thus,the objective of this study was to evaluate the levels of organic carbon and nitrogen und...The presence of trees in the pastures can bring several benefits to both the animals and to the soil under their influence.Thus,the objective of this study was to evaluate the levels of organic carbon and nitrogen under the baru canopy in the soil profile.Four adult baru trees were used.The samplings were made at the four cardinal points at four different distance points from the projection radius of the crown,being:P1=one-third of the crown projection radius length;P2=two-thirds of the crown projection radius length;P3=extremity of the crown projection radius;P4=one and a half times the maximum crown projection radius length.Soil samples were collected at each point at depths of 0-0.10,0.10-0.20 and 0.20-0.40 m.Organic carbon and nitrogen contents were evaluated and the C/N ratio was calculated.The baru trees influenced the soil organic and carbon contents in the areas under their canopy.The organic carbon and nitrogen contents were higher in relation to the tree trunk(P1)and also in the most superficial layer of the soil(0-0.10 m).The C/N ratio was higher outside the tree canopy and in the deeper layer.展开更多
文摘The presence of trees in the pastures can bring several benefits to both the animals and to the soil under their influence.Thus,the objective of this study was to evaluate the levels of organic carbon and nitrogen under the baru canopy in the soil profile.Four adult baru trees were used.The samplings were made at the four cardinal points at four different distance points from the projection radius of the crown,being:P1=one-third of the crown projection radius length;P2=two-thirds of the crown projection radius length;P3=extremity of the crown projection radius;P4=one and a half times the maximum crown projection radius length.Soil samples were collected at each point at depths of 0-0.10,0.10-0.20 and 0.20-0.40 m.Organic carbon and nitrogen contents were evaluated and the C/N ratio was calculated.The baru trees influenced the soil organic and carbon contents in the areas under their canopy.The organic carbon and nitrogen contents were higher in relation to the tree trunk(P1)and also in the most superficial layer of the soil(0-0.10 m).The C/N ratio was higher outside the tree canopy and in the deeper layer.
