Geostatistical and multivariate analysis of soil attributes between terrace channels in the semi-arid region

Authors

Keywords:

Erosão do solo, Terraços, Conservação do solo, Zonas de deposição, Zonas de perda

Abstract

 

The spatial variability of soil attributes in terraced areas is poorly studied in the semi-arid region. Considering that multivariate analysis enhances the diagnosis of spatial variability from geostatistics, soil attributes were studied in different zones between terrace channels in semi-arid region, more precisely in a retention terrace area in Canindé (Ceará, Brazil). Soil samples (n = 100) were collected at depths of 0.0 - 0.1 and 0.1 - 0.2 m for descriptive and geostatistical analysis. For multivariate analysis, samples from three zones relative to the terrace channel (Upper, Middle, and Lower) in the 0.0 - 0.2 m layer were considered, with 30 replicates. There was spatial dependence of soil attributes in the two layers studied. Near the channel, in the respective layers, there was higher clay content (13.7% and 14.7%) and higher degree of flocculation (61.3% and 71.7%) compared to the other zones. Water-dispersible clay was higher in the Upper zone (6.5% and 7.7% in the respective layers), while the Middle zone showed higher potential acidity in the evaluated layers (4.8 and 4.5 cmolc dm-3, respectively) compared to the other zones. In the multivariate analysis, there were highlights for the higher sum of bases in the Upper zone (18.9 ± 0.8 cmolc dm-3), higher sand content in the Middle zone (72.6 ± 0.6%), lower potential acidity (2.1 ± 0.2 cmolc dm-3) and higher phosphorus content (12.8 ± 3.0 mg kg-1) in the Low zone. The zone above the terrace channel loses mainly clay and requires practices to increase water and nutrient retention.  

Author Biographies

Mirian Cristina Gomes Costa, Universidade Federal do Ceará

 

 

Luan Alves Lima, Universidade Federal do Ceará

 

 

Carlos Tadeu dos Santos Dias, Universidade de São Paulo - ESALQ/USP

 

 

Francisco Ronaldo Alves de Oliveira, Instituto Federal de Educação, Ciência e Tecnologia do Piauí

 

   

Julius Blum, Universidade Federal do Ceará

 

 

José Carlos de Araújo, Universidade Federal do Ceará

 

 

Jaedson Cláudio Anunciato Mota, Universidade Federal do Ceará

 

 

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Published

2024-08-16

Issue

Section

Soil Science