WATER AVAILABILITY OF COHESIVE SOIL UNDER THE ACTION OF POLYACRYLAMIDE: ENVIRONMENTAL PHYSICAL QUALITY

Authors

  • Valerio Ferreira Marcelo Universidade Federal de Pernambuco
  • Brivaldo Gomes de Almeida Universidade Federal Rural de Pernambuco
  • José Coelho de Araújo Filho EMBRAPA - Solos
  • Wagner Luis da Silva Souza Universidade Federal Rural de Pernambuco

DOI:

https://doi.org/10.5327/Z2176-947820160009

Keywords:

LLWR; polymer; bulk density.

Abstract

The Coastal Trays have cohesive layers of soils that alter the state of the water in their pores, interfering in the development of the root system of the plants. This study aimed to evaluate the action of polyacrylamide and gypsum conditioners on the cohesive soil of Pernambuco Coastal Traps via the least limiting water range (LLWR). The samples were subdivided into three treatments — T0 (Control), T1 (Polyacrylamide) and T2 (Polyacrylamide + Gypsum) —, with four replicates per treatment. The water retention characteristic curve; soil density; soil resistance to root penetration (RP) and LLWR were evaluated. The means were submitted to ANOVA and Tukey’s test, by the Statistical Analysis System (SAS) application. The LLWR was efficient in detecting changes in soil water availability; being the treatment with polyacrylamide which promoted greater increase of this availability, being the critical value of the RP for the LLWR of the cohesive soil studied above 2 MPa.

Published

2016-12-30

How to Cite

Marcelo, V. F., Almeida, B. G. de, Araújo Filho, J. C. de, & Souza, W. L. da S. (2016). WATER AVAILABILITY OF COHESIVE SOIL UNDER THE ACTION OF POLYACRYLAMIDE: ENVIRONMENTAL PHYSICAL QUALITY. Brazilian Journal of Environmental Sciences (Online), (42), 12–25. https://doi.org/10.5327/Z2176-947820160009

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