02540nab a2200361 i 4500003000900000005001700009008004100026040001800067072000800085072000800093072000800101100002000109100002900129100003400158100003100192100002900223100003700252100002900289245010400318500007100422520118600493650001701679650002201696650003501718650002701753650002401780650002201804650001501826773022401841856007802065942001602143999001902159BR-BrBNA20240311145014.0240311b2023    bl.ar|pooa||| 00| 0 eng |  aBR-BrBNAbeng  aP33  aP35  aP01  aCamara, Rodrigo  aSilva, Luciélio Manoel  aFrade Junior, Elizio Ferreira  aMattar, Eduardo Pacca Luna  aSilva, Sandra Bezerra da  aSilva Neto, Eduardo Carvalho da   aPereira, Marcos Gervasio  aImpact of land use on the chemical attributes of the soil, Cruzeiro do Sul, in the Brazilian Amazon  a
Publicação on-line; 34 ref.; 3 tables; 3 illus.; Summary (En)  a

ABSTRACT - Vast areas of the Brazilian Amazon have been deforested for the expansion of livestock and the agricultural
frontier, which has resulted in soil exhaustion. It is therefore urgent to reduce deforestation and encourage sustainable land use
to promote social and economic development in the region. The aim of this study was to evaluate the impact of different land
use systems (an agroforestry system, cassava cultivation, non-degraded pasture, native forest) on the chemical properties of
the soil (0-40 cm) in the mesoregion of the Juruá Valley, in the state of Acre, Brazil. Principal component analysis showed the
soil in the forested area (reference) has greater values for P, Ca2+, Mg2+, K+, Na+, sum of bases, and cation exchange capacity;
while hierarchical cluster analysis suggested little dissimilarity to the soil in the agroforestry system, and high dissimilarity to
the soil in the areas of cassava cultivation and pasture. The results therefore support agroforestry as the most sustainable land
use system, compared to cassava cultivation or pasture. 


Key words: Soil fertility. Amazon Rainforest. Cassava cultivation. Pasture. Multivariate analysis.  aUSO DA TERRA  aANÁLISE DO SOLO  aPROPRIEDADE FÍSICO-QUÍMICA  aMÉTODO ESTATÍSTICO  aFERTILIDADE DO SOLO  aIMPACTO AMBIENTAL  aAMAZÔNIA0 042909275636dFortaleza-CE Universidade Federal do Ceará. Centro de Ciências Agrárias 2002o2023-437436tRevista Ciência Agronômica (Brazil)x0045-6888; 1806-6690 (on-line)gv. 54 p. 1-13; (2023)wBR2023002385  uhttps://www.scielo.br/j/rca/a/dGn8rYhJGcV88qcRS8MsYkQ/?format=pdf&lang=en  cAnalítico  c298738d298738