Soil attributes in systems agroecological and conventional irrigated cropping systems in Rio Grande do Norte Semiarid, Brazil
Journal Title: Revista Verde de Agroecologia e Desenvolvimento Sustentável - Year 2018, Vol 13, Issue 2
Abstract
The sustainability of irrigated agricultural systems in semiarid region is based on the maintenance of its production capacity. The objective of this work was to evaluate soil quality in agroecological and conventional irrigated areas, located in the community of Sombras Grandes, Caraúbas, Rio Grande do Norte. Simple soil samples were collected (at 0-20 cm and 20- 40 cm depths) from 2009 to 2012. The quality indicators used were: physical: Bulk density (Bd), Total Porosity (TP), Penetration Resistance (PR), relation of available water soil and total porosity (AWS/TP), relation of MR/TP, Flocculation Degree (FD) and Clay dispersed in water (CDW); chemicals: Hidrogen potential (pH), Phosphorus (P), Cation Exchange Capacity (CEC), Bases Saturation (V), Base Sum (BS), Total Organic Carbon (TOC), Carbon Stock (CS), Calcium (Ca+2), Magnesium (Mg+2), Potassium (K+ ), Sodium (Na+ ), Exchangeable Sodium Percentage (ESP) and Electric Condutivity (EC). The nonparametric Kruskal Wallis, Pearson's correlation and principal component analysis were used to evaluate soil quality. BS showed significant positive difference in agroecological area with V, TOC and CEC and in conventional area with V and CEC. The Bd, TP, CDW and FD, TOC and Al+H differed significantly and the best soil quality results were found in the agroecological area (0-20 cm). Ca+2, Mg+2, K+ , CEC, P and BS were not different and the high values recorded maintained soil fertility in both areas studied. The soil productive capacity in area agroecological was maintained, without the need for chemical fertilizer.
Authors and Affiliations
Fábio dos Santos Santiago, Suzana Maria Gico Lima Montenegro, Maria Rafaela de Almeida Pinheiro
Keywords
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- EP ID EP401746
- DOI 10.18378/rvads.v13i2.5335
- Views 99
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