Qualidade do solo sob atividade agropecu??ria no sul do Amazonas

Submitted by Mariana Coutrim dos Santos (marianacoutrimsantos@gmail.com) on 2022-04-30T04:39:21Z No. of bitstreams: 3 Santos, Mariana Coutrim - DISSERTA????O.pdf: 910956 bytes, checksum: c395aabce0b6f2a2c85dbe06754eed0a (MD5) Carta Encaminhamento-DISSERTA????O.pdf: 109414 bytes, checksum: 203402fd71f7321d23c28690ade0a74e (MD5) ATA.jpg.pdf: 741787 bytes, checksum: 7ffbc7020ca842cc2d8cb18bf13c38b1 (MD5) Approved for entry into archive by PPGCA - Humait?? Ci??ncias Ambientais - Humait?? (ppgca@ufam.edu.br) on 2022-04-30T12:49:35Z (GMT) No. of bitstreams: 3 Santos, Mariana Coutrim - DISSERTA????O.pdf: 910956 bytes, checksum: c395aabce0b6f2a2c85dbe06754eed0a (MD5) Carta Encaminhamento-DISSERTA????O.pdf: 109414 bytes, checksum: 203402fd71f7321d23c28690ade0a74e (MD5) ATA.jpg.pdf: 741787 bytes, checksum: 7ffbc7020ca842cc2d8cb18bf13c38b1 (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2022-05-03T13:44:25Z (GMT) No. of bitstreams: 3 Santos, Mariana Coutrim - DISSERTA????O.pdf: 910956 bytes, checksum: c395aabce0b6f2a2c85dbe06754eed0a (MD5) Carta Encaminhamento-DISSERTA????O.pdf: 109414 bytes, checksum: 203402fd71f7321d23c28690ade0a74e (MD5) ATA.jpg.pdf: 741787 bytes, checksum: 7ffbc7020ca842cc2d8cb18bf13c38b1 (MD5) Made available in DSpace on 2022-05-03T13:44:25Z (GMT). No. of bitstreams: 3 Santos, Mariana Coutrim - DISSERTA????O.pdf: 910956 bytes, checksum: c395aabce0b6f2a2c85dbe06754eed0a (MD5) Carta Encaminhamento-DISSERTA????O.pdf: 109414 bytes, checksum: 203402fd71f7321d23c28690ade0a74e (MD5) ATA.jpg.pdf: 741787 bytes, checksum: 7ffbc7020ca842cc2d8cb18bf13c38b1 (MD5) Previous issue date: 2022-03-30 CAPES - Coordena????o de Aperfei??oamento de Pessoal de N??vel Superior The Amazon region has increasingly attracted the attention of researchers due to the vast wealth of diversity of this biome, composition and complex soil structures. However, the forest has been suffering major interference and changes in its natural structure through the advance and agricultural expansion in the Amazon region arising from anthropic practices, which has resulted in degradation, loss of soil quality and the sustainability of production environments. The objective of this work was to evaluate the physical quality of the soil under agricultural activity in the southern region of Amazonas, aiming to investigate the impacts arising from agricultural practices currently used by rural producers in the municipality of Humait??-AM, using as indicators the physical attributes and the stock of carbon (EC) of soils. The study was carried out in the rural area of Humait??-AM, in four different environments, being the cultivation of a??a??, manioc, pasture and a forest area in three depths 0.00-0.05, 0.05-0.10 and 0.10-0.20 m, totaling 120 samples, collection was performed at 10 points in each studied area. The physical attributes evaluated were: textural analysis of sand, silt and clay fractions, soil density (Sd), weighted mean diameter (WPD), geometric mean diameter (WGD), soil penetration resistance (RSP), aggregate class < 1.00 mm, 1.00 ??? 2.00 mm and > 2.00 mm, total porosity (Tp), macroporosity (MaP), microporosity (MiP), gravimetric moisture (GM), soil organic carbon were also determined (COS), organic matter (OM) and soil carbon stock (EC). After the laboratory analysis of the attributes, tests of descriptive statistics were carried out and the means were compared by the Tukey test at 5% of probability, later, a multivariate analysis was carried out using the technique of analysis of principal components. According to the results obtained, it is concluded that the conversion of the forest area into agricultural use environments caused changes in soil attributes. A regi??o Amaz??nica tem atra??do cada vez mais a aten????o de pesquisadores devido a vasta riqueza de diversidade desse bioma, composi????o e estruturas complexas do solo. Entretanto a floresta vem sofrendo grandes interfer??ncias e modifica????es em sua estrutura natural mediante ao avan??o e expans??o agropecu??ria na regi??o Amaz??nica oriundos de pr??ticas antr??picas, que vem resultando na degrada????o, perda da qualidade do solo e a sustentabilidade dos ambientes de produ????o. O objetivo desse trabalho foi avaliar a qualidade f??sica do solo sob atividade agropecu??ria na regi??o Sul do Amazonas, visando investigar os impactos oriundos das pr??ticas agropecu??rias utilizadas atualmente pelos produtores rurais no munic??pio de Humait??-AM, utilizando como indicadores os atributos f??sicos e o estoque de carbono (EC) dos solos. O estudo foi realizado na zona rural de Humait??-AM, em quatro ambientes diferentes, sendo eles o cultivo de a??a??, mandioca, pastagem e uma ??rea de floresta em tr??s profundidades 0,00-0,05, 0,05-0,10 e 0,10-0,20 m, totalizando 120 amostras, a coleta foi realizada em 10 pontos de cada ??rea estudada. Os atributos f??sicos avaliados foram: an??lise textural das fra????es areia, silte e argila, densidade do solo (Ds), di??metro m??dio ponderado (DMP), di??metro m??dio geom??trico (DMG), resist??ncia do solo a penetra????o (RSP), classe de agregados < 1,00 mm, 1,00 ??? 2,00 mm e > 2,00 mm, porosidade total (Pt), macroporosidade (MaP), microporosidade (MiP), umidade gravim??trica (Ug), tamb??m foram determinados o carbono org??nico do solo (COS), mat??ria org??nica (MO) e estoque de carbono do solo (EC). Ap??s as an??lises laboratoriais dos atributos foram realizados testes de estat??stica descritiva e as m??dias comparadas pelo teste de Tukey a 5% de probabilidade, posteriormente foi realizada an??lise multivariada utilizando a t??cnica de an??lise de componentes principais. De acordo com os resultados obtidos, conclui-se que a convers??o da ??rea de floresta em ambientes de uso agropecu??rios ocasionou mudan??as nos atributos dos solos.