African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6691

Full Length Research Paper

Alluvial soil quality in agroforestry systems and native forest of the Brazilian semiarid region

Alessandro Antonio Lopes Nunes
  • Alessandro Antonio Lopes Nunes
  • Department of Environmental and Technological Sciences – DCAT, Universidade Federal Rural do Semi-Arido – UFERSA. Caixa Postal 137, CEP 59.625-900 Mossoro, Rio Grande do Norte, Brazil.
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Jeane Cruz Portela
  • Jeane Cruz Portela
  • Department of Environmental and Technological Sciences – DCAT, Universidade Federal Rural do Semi-Arido – UFERSA. Caixa Postal 137, CEP 59.625-900 Mossoro, Rio Grande do Norte, Brazil.
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Nildo da Silva Dias
  • Nildo da Silva Dias
  • Department of Environmental and Technological Sciences – DCAT, Universidade Federal Rural do Semi-Arido – UFERSA. Caixa Postal 137, CEP 59.625-900 Mossoro, Rio Grande do Norte, Brazil.
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Maria Laiane Ferreira Neto
  • Maria Laiane Ferreira Neto
  • UFERSA. Caixa Postal 137, CEP 59.625-900 Mossoro, Rio Grande do Norte, Brazil. 2Program of Post-Graduate in Soil and Plant Nutrition, ESALQ/USP, Brazil.
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Jucirema Ferreira da Silva
  • Jucirema Ferreira da Silva
  • Department of Environmental and Technological Sciences – DCAT, Universidade Federal Rural do Semi-Arido – UFERSA. Caixa Postal 137, CEP 59.625-900 Mossoro, Rio Grande do Norte, Brazil.
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Cezar Augusto Medeiros Reboucas
  • Cezar Augusto Medeiros Reboucas
  • UFERSA. Caixa Postal 137, CEP 59.625-900 Mossoro, Rio Grande do Norte, Brazil. 2Program of Post-Graduate in Soil and Plant Nutrition, ESALQ/USP, Brazil.
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Vania Christina Nascimento Porto
  • Vania Christina Nascimento Porto
  • Department of Environmental and Technological Sciences – DCAT, Universidade Federal Rural do Semi-Arido – UFERSA. Caixa Postal 137, CEP 59.625-900 Mossoro, Rio Grande do Norte, Brazil.
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Miguel Ferreira Neto
  • Miguel Ferreira Neto
  • Department of Environmental and Technological Sciences – DCAT, Universidade Federal Rural do Semi-Arido – UFERSA. Caixa Postal 137, CEP 59.625-900 Mossoro, Rio Grande do Norte, Brazil.
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  •  Received: 17 June 2015
  •  Accepted: 21 August 2015
  •  Published: 17 September 2015

Abstract

The agroforestry systems consist of techniques appropriate to local conditions, taking into account the coexistence with the semiarid in Brazil. The objective of the research was to evaluate the soil properties in agroforestry management units (SAFs), and native forest, in Bueno community, city of Irauçuba, CE. Treatments were: (1) Agroforestry management unit SAF 1 in the elevated portion of the landscape (interfluve); (2) Agroforestry management unit SAF 2 in the portion of slope (colluvium), and (3) Native forest. Soil samples were collected: 5 composite samples, derived from 15 sub-samples in areas of study in the layers 0.00-0.10; 0.10-0.20; 0.20-0.30 and 0.30-0.40 m. It was a completely randomized design, with 5 repetitions, treatments (SAF 1, SAF 2 and native forest) and the plots being repetitions. The analysis of variance was applied and means submitted to Tukey test at 5%. There were significant differences for properties analyzed, except to CEes, indicating low concentration of soluble salts, without risks of salinity (0.25 a 0.34 dS m-1). The exchangeable sodium (9.51 a 29.88 mg dm-3), with normal values of PST (0.66 a 1.35%), in the SAF 2 differed from the others. The values of exchangeable sodium considered high are not characterized with restriction according to the normal EST. The units of SAF 1 and SAF 2 contributed to the maintenance of soil quality in top condition to MN, featuring high levels of calcium, magnesium and potassium, with restrictions to the exchangeable sodium SAF 1 and SAF 2 to a lesser extent to the native forest.

 

Key words: Irauçuba-CE, semiarid, caatinga, agroecology.