African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6688

Full Length Research Paper

Aggregation and organic matter content in different tillage systems for sugarcane

Everton Martins Arruda*
  • Everton Martins Arruda*
  • Universidade Federal de Uberlândia, Institute de Ciências Agrárias, CEP: 38400-902 - Uberlândia, Minas Gerais, Brazil.
  • Google Scholar
Risely Ferraz de Almeida
  • Risely Ferraz de Almeida
  • Universidade Federal de Uberlândia, Institute de Ciências Agrárias, CEP: 38400-902 - Uberlândia, Minas Gerais, Brazil.
  • Google Scholar
Antonio Carlos da Silva Junior
  • Antonio Carlos da Silva Junior
  • Universidade Federal de Uberlândia, Institute de Ciências Agrárias, CEP: 38400-902 - Uberlândia, Minas Gerais, Brazil.
  • Google Scholar
Bruno Teixeira Ribeiro
  • Bruno Teixeira Ribeiro
  • Universidade Federal de Uberlândia, Institute de Ciências Agrárias, CEP: 38400-902 - Uberlândia, Minas Gerais, Brazil.
  • Google Scholar
Adriane de Andrade Silva
  • Adriane de Andrade Silva
  • Universidade Federal de Uberlândia, Institute de Ciências Agrárias, CEP: 38400-902 - Uberlândia, Minas Gerais, Brazil.
  • Google Scholar
Regina Maria Quintão Lana
  • Regina Maria Quintão Lana
  • Universidade Federal de Uberlândia, Institute de Ciências Agrárias, CEP: 38400-902 - Uberlândia, Minas Gerais, Brazil.
  • Google Scholar


  •  Received: 21 October 2014
  •  Accepted: 09 January 2015
  •  Published: 22 January 2015

Abstract

Monitoring the physical quality of Cerrado soils under intensive sugarcane production requires sustainable forms of soil use and management. Thus, the objective of this research was to evaluate the aggregation and organic matter content in soil planted with sugarcane under different tillage systems. The experiment was conducted at the Jalles Machado Sugarcane Mill, in the city of Goianésia – Goiás State, Brazil. The statistical design was a randomized block with four replications. The following treatments were evaluated: 1. Moldboard plow + harrow (AA + G); 2. Ripper + harrow (SS + G); 3. Direct furrowing (SD); 4. Ripper + direct furrowing (SS + SD); 5. Stubble thrasher + ripper (DS + SS); 6. Stubble thrasher + harrow + moldboard plow + harrow (DS + GAAG), for the soil layers of 0-0.2; 0.2-0.4 and 0.4-0.6 m depth. The highest soil organic matter (SOM) levels, geometric mean diameter (GMD) values and distribution of aggregates between 4-2 mm were found in the 0-0.2 m layer for the SD and SS + SD treatment. There was a positive correlation between the SOM and GMD values. SD, SS + SD and DS + GAAG systems showed higher soil aggregate classes between 4-2 mm when compared to DS + SS in the 0.2-0.4 m layer. There was also an increase in the <0.25 mm class for AA + G. The AA + G + and DS + GAAG conventional systems had higher sugarcane yields, but these results were statistically similar to the conservation cropping system.

 

Key words: Soil management, aggregates, Brazilian Cerrado, ratoon.