Spatial Variability and Correlation between Soil Physical Properties under No-Tillage with and without Agricultural Terraces

Bisolo, Alinne; Rodrigues, Miriam Fernanda; Conceição, Fagner Goes da; Pellegrini, André

doi:10.1590/1678-4324-PSSM-2024230802

Acessibilidade / Reportar erro

Brasil

Brazilian Archives of Biology and Technology

Español English

Brasil

Español English

sumário « anterior atual seguinte »

Sumário

Article - Agronomy/Soil Science • Braz. arch. biol. technol. 67 (spe1) • 2024 • https://doi.org/10.1590/1678-4324-PSSM-2024230802 copy

Spatial Variability and Correlation between Soil Physical Properties under No-Tillage with and without Agricultural Terraces

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

The terracing is important for erosion processes control in agricultural areas. However, agricultural terraces are being removed from the production areas under no-tillage systems. There are still uncertainties about the terracing effects on the soil saturated hydraulic conductivity (Ks) and macroporosity (Macro), which represent the functionality of the system. We aimed to evaluate the magnitude and spatial distribution of Ks and Macro and the correlation between these soil properties in two paired megaplots, of 1.923 ha, one with terraces (T) and another without terraces (WT). Ks and Macro were determined at 0.00-0.10 m, 0.10-0.20 m, 0.20-0.30 m, and 0.30-0.40 m soil layers and submitted to descriptive statistical, geostatistics, and Spearman correlation analysis. Ks was highest in the 0.00-0.20 m and lowest in the 0.20-0.40 m layers in T. In WT, Ks was highest in the 0.00-0.10 m and lowest in the 0.10-0.40 m layers. However, the Macro was highest in the 0.00-0.10 m and lowest in the 0.10-0.40 m layers in both megaplots. Ks and Macro had a positive correlation in both megaplots. The spatial distribution of Ks and Macro had a positive correlation, with regions with higher Ks coinciding with regions with higher Macro in both megaplots. The spatial distribution of Ks and Macro in WT did not have a clear trend, while in T there was a slight stratification in strips interspersed with higher and lower Ks and Macro. These initial trends are not conclusive considering the short term between terraces removal and Ks and Macro evaluation.

Keywords:
soil saturated hydraulic conductivity; macroporosity; correlation between soil properties; geostatistics

HIGHLIGHTS

Macro has mean and Ks has high variability.

The agricultural terraces can positively influence the behavior of Ks.

Ks and Macro have a significant positive correlation.

The absence of agricultural terraces can provide a reduction of Ks with soil depth.

Soil depth (m)	N	Mean	Median	Variance	Standard deviation	Skewness	Kurtosis	Minimum	Maximum	CV (%)	W	p-value
Soil saturated hydraulic conductivity (cm h^-1)
WT
0.00-0.10	32	4.499	3.710	10.932	3.306	0.889	0.081	0.029	12.665	73.483	0.918	0.018
0.10-0.20	32	1.675	1.699	1.516	1.231	0.639	0.413	0.000	5.339	73.493	0.942	0.085
0.20-0.30	32	1.277	1.092	1.490	1.221	1.184	1.777	0.000	5.412	95.615	0.866	0.001
0.30-0.40	32	1.389	0.689	2.312	1.521	0.883	-0.412	0.018	5.388	109.503	0.834	< 0.001
T
0.00-0.10	32	4.870	3.793	9.848	3.138	1.468	1.285	1.449	13.895	64.435	0.809	< 0.001
0.10-0.20	32	2.077	2.068	1.879	1.371	0.419	-0.228	0.047	5.598	66.009	0.959	0.256
0.20-0.30	32	1.313	0.974	1.882	1.372	1.139	0.682	0.000	5.155	104.494	0.858	0.001
0.30-0.40	32	1.027	0.297	2.331	1.527	1.826	2.214	0.026	5.768	148.685	0.676	< 0.001
Macroporosity (cm³ cm^-3)
WT
0.00-0.10	32	0.136	0.133	0.002	0.045	0.144	0.473	0.024	0.250	33.088	0.983	0.890
0.10-0.20	32	0.116	0.108	0.001	0.027	0.384	-0.881	0.069	0.171	23.276	0.961	0.284
0.20-0.30	32	0.119	0.119	0.001	0.028	0.703	1.128	0.067	0.207	23.529	0.957	0.233
0.30-0.40	32	0.119	0.119	0.001	0.024	0.451	-0.759	0.081	0.177	20.168	0.960	0.277
T
0.00-0.10	32	0.134	0.121	0.002	0.040	0.732	-0.331	0.072	0.226	29.851	0.934	0.050
0.10-0.20	32	0.118	0.114	0.001	0.028	0.497	-0.643	0.072	0.179	23.729	0.956	0.219
0.20-0.30	32	0.113	0.109	0.001	0.036	0.260	-0.314	0.045	0.197	31.858	0.980	0.809
0.30-0.40	32	0.111	0.107	0.001	0.033	0.100	-1.223	0.054	0.168	29.730	0.958	0.247

Soil layer (m)	T		WT
Soil layer (m)	ρ	p-value	ρ	p-value
0.00-0.10	0.664	< 0.001	0.448	0.011
0.10-0.20	0.587	< 0.001	0.456	0.009
0.20-0.30	0.617	< 0.001	0.441	0.012
0.30-0.40	0.279	0.122	0.273	0.131

Instituto de Tecnologia do Paraná - Tecpar Rua Prof. Algacyr Munhoz Mader, 3775 - CIC, 81350-010 Curitiba PR Brazil, Tel.: +55 41 3316-3052/3054, Fax: +55 41 3346-2872 - Curitiba - PR - Brazil
E-mail: babt@tecpar.br

Acompanhe os números deste periódico no seu leitor de RSS

[1] *Correspondence: alinne_bisolo@hotmail.com; Tel.: +55-46-999037820 (A.B.).