efeitos da subsolagem e da adubação verde nas propriedades físicas do solo em pomar de citros subsoiling and green manuring effects on soil physical properties on citrus orchard
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2006
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Abstract
O presente trabalho teve por objetivo avaliar o efeito da subsolagem e da adubação verde nas propriedades físicas de um Latossolo Vermelho distrófico típico, cultivado com citros (laranjeira Valência). Os tratamentos empregados foram: manejo mecânico das plantas invasoras com roçadora (Testemunha); subsolagem em um lado da planta na entrecopa; subsolagem nos dois lados da planta na entrecopa, e semeadura direta de Crotalaria spectabilis na entrecopa. As propriedades físicas do solo avaliadas foram: porosidade total, macroporosidade, microporosidade, densidade, resistência mecânica à penetração vertical e condutividade hidráulica. Na avaliação efetuada na safra 2001-2002, obtiveram-se os maiores valores de densidade do solo e resistência do solo à penetração vertical, e os menores valores de macroporos e condutividade hidráulica do solo nas entrecopas com e sem tráfego no pomar, em relação à região da copa, principalmente na camada de 0,0-0,2 m de profundidade. Os tratamentos aplicados não surtiram efeitos positivos significativos nas propriedades físicas do solo.
The present work was conducted to evaluate the effects of subsoiling and green manuring on soil physical properties of a Typical Haplustox soil cultivated with Valencia orange trees. The treatments applied were mechanic management of the invaders plants with shredder (witness); subsoiling in one side of the plant on between crown; subsoiling on both sides of the plant on between crown and direct seeding of Crotalaria spectabilis on between crown. The soil physical properties evaluated were porosity, macro porosity, micro porosity, bulk density and mechanical resistance to vertical penetration and hydraulic conductivity. The evaluation effectuated to the harvest in 2001/2002, got the greatest values of bulk density and soil resistance to vertical penetration, and the least values of macro porosity and soil hydraulic conductivity on the region between crown, with and without traffic in relation to the crown, especially on the layer 0.0-0.2 m of depth. The treatments used did not result in positive significative effects on the soil physical properties.
The present work was conducted to evaluate the effects of subsoiling and green manuring on soil physical properties of a Typical Haplustox soil cultivated with Valencia orange trees. The treatments applied were mechanic management of the invaders plants with shredder (witness); subsoiling in one side of the plant on between crown; subsoiling on both sides of the plant on between crown and direct seeding of Crotalaria spectabilis on between crown. The soil physical properties evaluated were porosity, macro porosity, micro porosity, bulk density and mechanical resistance to vertical penetration and hydraulic conductivity. The evaluation effectuated to the harvest in 2001/2002, got the greatest values of bulk density and soil resistance to vertical penetration, and the least values of macro porosity and soil hydraulic conductivity on the region between crown, with and without traffic in relation to the crown, especially on the layer 0.0-0.2 m of depth. The treatments used did not result in positive significative effects on the soil physical properties.
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minatel2006engenhariaefeitos
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| Authors | ;Alder L. G. Minatel;Itamar Andrioli;José F. Centurion;William Natale |
| Journal | bioorganic and medicinal chemistry letters |
| Year | 2006 |
| DOI |
10.1590/S0100-69162006000100010
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