Soil Carbon and Nitrogen Stocks under Agrosilvopastoral Systems with Different Arrangements in a Transition Area between Cerrado and Caatinga Biomes in Brazil
Abstract
:1. Introduction
2. Materials and Methods
2.1. Study Site and Characterization of the Experimental Area
2.2. Treatments
2.3. Land Use History
2.4. Soil Sampling
2.5. Soil Organic Carbon (SOC) and Nitrogen (N) Contents and Stocks
2.6. C Contents in the Humic Fractions of SOM
2.7. Statistical Analyses
3. Results
4. Discussion
5. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Soil Depth (cm) | Land Use and Management Systems | |||||
---|---|---|---|---|---|---|
ASP1 | ASP2 | ASP3 | ASP4 | RS | NV | |
SOC (g kg−1) | ||||||
0–10 | 14.20 ± 0.69 *c | 17.58 ± 1.22 b | 16.85 ± 1.14 b | 17.57 ± 0.90 b | 13.02 ± 2.13 c | 25.63 ± 1.53 a |
10–20 | 12.96 ± 0.72 b | 15.01 ± 1.48 a | 15.84 ± 0.79 a | 16.66 ± 0.50 a | 11.37 ± 1.49 b | 19.77 ± 2.20 a |
20–30 | 11.20 ± 0.77 b | 14.82 ± 0.71 a | 15.12 ± 0.52 a | 14.50 ± 0.25 a | 8.81 ± 1.32 c | 15.67 ± 0.68 a |
0–30 | 12.79 ± 0.29 c | 15.80 ± 1.12 b | 15.94 ± 0.66 b | 16.24 ± 0.43 b | 11.06 ± 1.05 c | 20.36 ± 1.34 a |
N (g kg−1) | ||||||
0–10 | 1.63 ± 0.05 a | 1.61 ± 0.05 a | 1.51 ± 0.09 a | 1.59 ± 0.09 a | 1.11 ± 0.10 b | 1.66 ± 0.08 a |
10–20 | 1.48 ± 0.09 a | 1.55 ± 0.06 a | 1.38 ± 0.08 a | 1.53 ± 0.06 a | 1.03 ± 0.08 b | 1.33 ± 0.11 a |
20–30 | 1.39 ± 0.06 a | 1.22 ± 0.13 a | 1.27 ± 0.12 a | 1.35 ± 0.03 a | 0.82 ± 0.02 b | 1.05 ± 0.06 b |
0–30 | 1.50 ± 0.06 a | 1.46 ± 0.07 a | 1.39 ± 0.09 a | 1.49 ± 0.06 a | 0.99 ± 0.06 b | 1.35 ± 0.08 a |
C/N | ||||||
0–10 | 8.75 ± 0.50 b | 10.97 ± 0.91 b | 11.44 ± 1.30 b | 11.11 ± 0.53 b | 11.38 ± 1.08 b | 15.39 ± 0.50 a |
10–20 | 8.82 ± 0.60 b | 9.85 ± 1.23 b | 11.69 ± 0.99 b | 10.96 ± 0.46 b | 10.96 ± 1.18 b | 14.87 ± 1.04 a |
20–30 | 8.03 ± 0.33 b | 12.95 ± 1.93 a | 12.49 ± 1.80 a | 10.74 ± 0.15 b | 10.69 ± 1.62 b | 15.02 ± 0.65 a |
0–30 | 8.53 ± 0.32 c | 11.26 ± 1.27 b | 11.87 ± 1.33 b | 10.94 ± 0.28 b | 11.01 ± 0.53 b | 15.10 ± 0.49 a |
Soil Depth (cm) | Land Use and Management Systems | |||||
---|---|---|---|---|---|---|
ASP1 | ASP2 | ASP3 | ASP4 | RS | NV | |
C-FAF (g kg−1) | ||||||
0–10 | 1.26 ± 0.08 *b | 1.23 ± 0.10 b | 0.99 ± 0.09 b | 0.79 ± 0.11 b | 1.34 ± 0.33 b | 1.95 ± 0.09 a |
10–20 | 1.15 ± 0.06 b | 1.07 ± 0.11 b | 0.77 ± 0.05 b | 0.73 ± 0.05 b | 1.30 ± 0.22 a | 1.74 ± 0.29 a |
20–30 | 1.00 ± 0.06 b | 0.86 ± 0.09 b | 0.84 ± 0.07 b | 0.62 ± 0.07 b | 1.04 ± 0.22 b | 1.37 ± 0.13 a |
0–30 | 1.14 ± 0.05 b | 1.05 ± 0.08 b | 0.87 ± 0.06 b | 0.72 ± 0.07 b | 1.22 ± 0.25 b | 1.68 ± 0.15 a |
C-HAF (g kg−1) | ||||||
0–10 | 2.13 ± 0.18 b | 2.05 ± 0.33 b | 2.37 ± 0.28 b | 2.17 ± 0.20 b | 2.55 ± 0.24 b | 4.11 ± 0.38 a |
10–20 | 2.54 ± 0.48 b | 1.80 ± 0.39 b | 2.23 ± 0.34 b | 1.96 ± 0.33 b | 2.72 ± 0.39 b | 3.88 ± 0.31 a |
20–30 | 2.07 ± 0.45 a | 1.65 ± 0.23 a | 2.15 ± 0.29 a | 1.34 ± 0.25 a | 1.95 ± 0.16 a | 2.63 ± 0.24 a |
0–30 | 2.25 ± 0.27 b | 1.83 ± 0.29 b | 2.25 ± 0.27 b | 1.82 ± 0.23 b | 2.41 ± 0.24 b | 3.54 ± 0.31 a |
C-HUF (g kg−1) | ||||||
0–10 | 8.66 ± 0.46 b | 9.02 ± 0.66 b | 9.54 ± 1.20 b | 8.22 ± 0.37 b | 9.67 ± 0.56 b | 13.92 ± 0.67 a |
10–20 | 7.40 ± 0.35 a | 8.44 ± 0.84 a | 8.38 ± 0.39 a | 7.76 ± 0.51 a | 8.26 ± 0.63 a | 9.76 ± 1.19 a |
20–30 | 6.70 ± 0.31 a | 7.40 ± 0.76 a | 7.80 ± 0.42 a | 6.90 ± 0.27 a | 6.20 ± 0.32 a | 6.57 ± 0.61 a |
0–30 | 7.58 ± 0.30 b | 8.29 ± 0.73 b | 8.57 ± 0.60 b | 7.63 ± 0.32 b | 8.04 ± 0.45 b | 10.08 ± 0.67 a |
C-HAF/C-FAF | ||||||
0–10 | 1.73 ± 0.19 a | 1.65 ± 0.23 a | 2.44 ± 0.30 a | 2.94 ± 0.40 a | 2.98 ± 1.28 a | 2.12 ± 0.20 a |
10–20 | 2.27 ± 0.53 a | 1.67 ± 0.37 a | 3.01 ± 0.63 a | 2.64 ± 0.35 a | 2.38 ± 0.56 a | 2.44 ± 0.37 a |
20–30 | 2.07 ± 0.42 a | 1.89 ± 0.15 a | 2.70 ± 0.55 a | 2.13 ± 0.27 a | 2.46 ± 0.74 a | 1.95 ± 0.13 a |
0–30 | 2.02 ± 0.27 a | 1.74 ± 0.24 a | 2.72 ± 0.48 a | 2.57 ± 0.13 a | 2.61 ± 0.70 a | 2.17 ± 0.13 a |
(C-HAF+C-FAF)/C-HUF | ||||||
0–10 | 0.39 ± 0.01 a | 0.36 ± 0.03 a | 0.36 ± 0.01 a | 0.36 ± 0.02 a | 0.40 ± 0.04 a | 0.44 ± 0.03 a |
10–20 | 0.50 ± 0.06 a | 0.33 ± 0.03 b | 0.36 ± 0.04 b | 0.34 ± 0.02 b | 0.49 ± 0.05 a | 0.58 ± 0.01 a |
20–30 | 0.46 ± 0.07 b | 0.34 ± 0.03 c | 0.38 ± 0.02 c | 0.28 ± 0.04 c | 0.48 ± 0.04 b | 0.61 ± 0.02 a |
0–30 | 0.45 ± 0.03 b | 0.34 ± 0.03 c | 0.36 ± 0.02 c | 0.33 ± 0.03 c | 0.46 ± 0.04 b | 0.54 ± 0.01 a |
System | Annual Accumulation Rate (Mg ha−1 Year−1) | |
---|---|---|
SOC | N | |
ASP1 | 1.00 | 0.33 |
ASP2 | 3.42 | 0.34 |
ASP3 | 4.31 | 0.36 |
ASP4 | 3.91 | 0.36 |
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Freitas, I.C.d.; Alves, M.A.; Magalhães, J.R.; Dias, R.F.; Albuquerque, C.J.B.; Ferreira, E.A.; Fernandes, L.A.; Pegoraro, R.F.; Frazão, L.A. Soil Carbon and Nitrogen Stocks under Agrosilvopastoral Systems with Different Arrangements in a Transition Area between Cerrado and Caatinga Biomes in Brazil. Agronomy 2022, 12, 2926. https://doi.org/10.3390/agronomy12122926
Freitas ICd, Alves MA, Magalhães JR, Dias RF, Albuquerque CJB, Ferreira EA, Fernandes LA, Pegoraro RF, Frazão LA. Soil Carbon and Nitrogen Stocks under Agrosilvopastoral Systems with Different Arrangements in a Transition Area between Cerrado and Caatinga Biomes in Brazil. Agronomy. 2022; 12(12):2926. https://doi.org/10.3390/agronomy12122926
Chicago/Turabian StyleFreitas, Igor Costa de, Matheus Almeida Alves, Jaílson Ramos Magalhães, Rafael Ferreira Dias, Carlos Juliano Brant Albuquerque, Evander Alves Ferreira, Luiz Arnaldo Fernandes, Rodinei Facco Pegoraro, and Leidivan Almeida Frazão. 2022. "Soil Carbon and Nitrogen Stocks under Agrosilvopastoral Systems with Different Arrangements in a Transition Area between Cerrado and Caatinga Biomes in Brazil" Agronomy 12, no. 12: 2926. https://doi.org/10.3390/agronomy12122926