Chemical attributes of a silvopastoral
system with legume trees and signal
grass in the Brazilian savanna
Oral presentatio...
INTRODUCTION
South America
Brazil
•
•
•

BRAZILIAN SAVANNAH
“CERRADO”

204 million ha
~67% of the land area of India
55% of natural vegetation
substituted b...
The “Cerrado”

Total production of Brazil
• 40% of cattle and soybean;
• 20% of rice, corn and coffee
• 10% of beans, suga...
MATERIALS AND METHODS
Climatology

1,471 mm

15.1oC

27.9 oC
35.3 ha
26.5 ha
19/2/2014

10
SILVOPASTURE

Pterodon
emarginatus

Urochloa
brizantha
19/2/2014

11
SILVOPASTURE

16/9/2013

12
CONTROL AREA

19/2/2014

13
Results of soil chemical
analysis
Table 2: Average values of chemical attributes on a silvopasture system (SP) and open pa...
Table 2: Average values of chemical attributes on a sil
Depth
Ca
Mg
cm
SP
CT
SP
CT
-10
0.26 aB 0.55 aA 0.12 aB 0.30 a
Less...
erage values of chemical attributes onofachemical attributes on(SP)
Table 2: Average values silvopasture system a silv
Ca ...
• K, Al, B, Zn and Base Saturation did not
differ among systems but decreased with
depth;
Table 3: Average values of chemical attributes on a silvopasture system (SP) and open pa
Depth
Cu
Fe
B
mg (dm3)-1
cm
SP
CT...
RESULTS AND DISCUSSION
Depth
cm

P

Water pH

S

OM
dag kg-1

SP
-10
-20
-40
-100
-140
All depths

OC

mg (dm 3)-1

CT

SP...
RESULTS AND DISCUSSION
OC

Depth
cm

P

Water pH

mg (dm 3)-1

SP

SP
-10
-20
-40
-100
-140
All depths

dag kg-1
OC

S

CT...
0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

Organic Carbon dag kg-1
1.60 1.80 2.00 2.20

0
-20
-40
-60
Depth
cm
-80
-1...
CONCLUSIONS
• The Cerrado tree, Pterodon
emarginatus, in SPS, extracted more Ca
and Mg from 0-20 cm layers than
pasture al...
...CONCLUSIONS
• SPS had higher levels of organic carbon
and organic matter;
• Organic carbon increased soil
equilibrium f...
THANK YOU!

19/2/2014

28
ACKNOWLEGMENTS
• Amilton Naves, the owner of the farm where the
experiment took place;
• Colegiado do Programa de Pós-grad...
Session 6.5 chemicall attributes of silvopastoral systems brazilian savanna
Session 6.5 chemicall attributes of silvopastoral systems brazilian savanna
Session 6.5 chemicall attributes of silvopastoral systems brazilian savanna
Session 6.5 chemicall attributes of silvopastoral systems brazilian savanna
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Session 6.5 chemicall attributes of silvopastoral systems brazilian savanna

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Transcript of "Session 6.5 chemicall attributes of silvopastoral systems brazilian savanna"

  1. 1. Chemical attributes of a silvopastoral system with legume trees and signal grass in the Brazilian savanna Oral presentation World Congress on Agroforestry – Delhi - India 2014 Rodrigo Martins Alves de Mendonça Universidade Federal de Minas Gerais - BRAZIL
  2. 2. INTRODUCTION
  3. 3. South America
  4. 4. Brazil
  5. 5. • • • BRAZILIAN SAVANNAH “CERRADO” 204 million ha ~67% of the land area of India 55% of natural vegetation substituted by agriculture and pastures (Sano et al., 2008)
  6. 6. The “Cerrado” Total production of Brazil • 40% of cattle and soybean; • 20% of rice, corn and coffee • 10% of beans, sugarcane and cassava (Martha Junior & Vilela 2002) Source: Woods Hole R.C. (2013)
  7. 7. MATERIALS AND METHODS
  8. 8. Climatology 1,471 mm 15.1oC 27.9 oC
  9. 9. 35.3 ha 26.5 ha
  10. 10. 19/2/2014 10
  11. 11. SILVOPASTURE Pterodon emarginatus Urochloa brizantha 19/2/2014 11
  12. 12. SILVOPASTURE 16/9/2013 12
  13. 13. CONTROL AREA 19/2/2014 13
  14. 14. Results of soil chemical analysis Table 2: Average values of chemical attributes on a silvopasture system (SP) and open pasture control area (CT), up to 140 cm deep Depth Ca Mg K Al H+Al BS cm cmolc (dm3)-1 % SP CT SP CT SP CT Systems SP CT Systems SP CT SP CT -10 0.26 aB 0.55 aA 0.12 aB 0.30 aA 0.07 0.09 0.08 a 0.86 0.55 0.72 a 5.84 3.48 9.70 21.37 -20 0.12 bB 0.25 bA 0.10 a 0.13 ab 0.07 0.06 0.07 a 0.84 0.60 0.73 a 5.60 3.85 6.12 10.33 -40 0.20 abA 0.20 bA 0.04 ab 0.10 abc 0.04 0.04 0.04 b 0.74 0.48 0.62 a 5.40 3.38 6.68 9.27 -100 0.16 abA 0.18 bA 0.00 b 0.00 c 0.02 0.02 0.02 c 0.46 0.28 0.38 b 4.58 2.60 4.46 7.52 -140 0.12 bA 0.15 bA 0.00 b 0.03 bc 0.01 0.01 0.01 d 0.38 0.05 0.23 b 4.22 2.08 3.44 8.60 Averages followed by different lowercase letters in the lines are different among depths (p<0.05 Tukey Test) Averages followed by different capital letters in the columns, are different among treatments (p<0.05 Tukey Test) Systems 14.89 7.99 7.83 5.82 5.73 a b b b b
  15. 15. Table 2: Average values of chemical attributes on a sil Depth Ca Mg cm SP CT SP CT -10 0.26 aB 0.55 aA 0.12 aB 0.30 a Less than half -20 0.12 bB 0.25 bA 0.10 a 0.13 a -40 0.20 abA 0.20 bA 0.04 ab 0.10 ab -100 0.16 abA 0.18 bA 0.00 b 0.00 c -140 0.12 bA 0.15 bA 0.00 b 0.03 b
  16. 16. erage values of chemical attributes onofachemical attributes on(SP) Table 2: Average values silvopasture system a silv Ca Depth Mg Ca Mg K 3 -1 cmolc (dm ) cm SP CT SP CT SP CT CT Syste SP CT SP 0.26 aB 0.55-10 0.12 aBaB 0.30 aA 0.07 One third a aA 0.26 0.09 0.08 0.55 aA 0.12 aB 0.30 0.25 bA 0.10 a 0.12 bB 0.25-20 0.10 a bB 0.13 ab 0.07 0.06 0.13 a bA 0.12 0.07 0.20 abA 0.20-40 0.04 ab 0.10 abc 0.04 ab 0.10 ab bA 0.20 abA 0.20 bA 0.04 0.04 0.04 -100 0.16 0.18 0.00 b 0.16 abA 0.18 bA 0.00 babA0.00 cbA 0.02 0.02 0.00 c 0.02 -140 0.12 0.15 0.00 b 0.12 bA 0.15 bA 0.00 b bA 0.03 bcbA 0.01 0.01 0.03 b 0.01
  17. 17. • K, Al, B, Zn and Base Saturation did not differ among systems but decreased with depth;
  18. 18. Table 3: Average values of chemical attributes on a silvopasture system (SP) and open pa Depth Cu Fe B mg (dm3)-1 cm SP CT Systems SP CT Systems SP CT Syst -10 1.10 0.67 0.91 a 130.80 72.00 3.44 a 0.11 0.07 3.44 -20 1.04 0.55 0.82 a 77.60 44.00 2.54 b 0.11 0.07 2.54 -40 0.86 0.40 0.66 bc 56.20 28.50 2.20 c 0.09 0.05 2.20 -100 0.68 0.30 0.51 c 29.20 13.50 1.64 d 0.05 0.06 1.64 -140 0.46 0.28 0.38 c 17.40 8.75 1.23 e 0.05 0.06 1.23 All depths 0.83 A 0.44 B 62.24 A 33.35 B Averages followed by different lowercase letters in the lines are different among depths (p<0.05 Tukey Test) Averages followed by different capital letters in the columns, are different among treatments (p<0.05 Tukey Test)
  19. 19. RESULTS AND DISCUSSION Depth cm P Water pH S OM dag kg-1 SP -10 -20 -40 -100 -140 All depths OC mg (dm 3)-1 CT SP CT Systems SP CT 4.88 4.90 4.84 4.96 5.02 4.92 B 5.08 5.02 5.15 5.20 5.28 5.15 0.76 0.44 0.38 0.32 0.30 0.85 0.53 0.33 0.25 0.28 0.80 a 0.48 b 0.36 bc 0.29 c 0.29 c 5.00 3.80 4.00 4.20 3.20 3.75 4.25 2.75 2.75 2.50 A Systems 4.44 4.00 3.44 3.56 2.89 a ab ab ab b SP CT 2.07 1.60 1.42 1.08 0.83 1.40 1.90 1.32 1.10 0.80 0.56 1.14 B A Systems Averages followed by different lowercase letters in the lines are different among depths (p<0.05 Tukey Test) Averages followed by different capital letters in the columns, are different among treatments (p<0.05 Tukey Test) 2.00 1.48 1.28 0.95 0.71 a b c d e SP CT 3.58 2.76 2.44 1.86 1.44 2.42 3.27 2.28 1.90 1.38 0.97 1.96 B A Systems 3.44 2.54 2.20 1.64 1.23 a b c d e
  20. 20. RESULTS AND DISCUSSION OC Depth cm P Water pH mg (dm 3)-1 SP SP -10 -20 -40 -100 -140 All depths dag kg-1 OC S CT SP CT Systems SP CT 4.88 4.90 4.84 4.96 5.02 4.92 B 5.08 5.02 5.15 5.20 5.28 5.15 0.76 0.44 0.38 0.32 0.30 0.85 0.53 0.33 0.25 0.28 0.80 a 0.48 b 0.36 bc 0.29 c 0.29 c 5.00 3.80 4.00 4.20 3.20 3.75 4.25 2.75 2.75 2.50 A CT Systems SP 2.07 4.44 4.00 3.44 3.56 2.89 OM dag kg-1 Systems CT Systems 1.90 2.00 a 2.07 1.90 2.00 a 1.601.60 1.32 1.48 ab 1.32 1.48 b 1.421.42 1.10 1.28 ab 1.10 1.28 c ab 0.80 0.95 d 1.081.08 0.80 0.95 b 0.83 0.56 0.71 e 0.831.40 A 0.56 B 0.71 1.14 1.40 A 1.14 B 23% Averages followed by different lowercase letters in the lines are different among depths (p<0.05 Tukey Test) Averages followed by different capital letters in the columns, are different among treatments (p<0.05 Tukey Test) SP a 3.58 b 2.76 c 2.44 1.86 d 1.44 e 2.42 CT A 3.27 2.28 1.90 1.38 0.97 1.96 B Systems 3.44 2.54 2.20 1.64 1.23 a b c d e
  21. 21. 0.00 0.20 0.40 0.60 0.80 1.00 1.20 1.40 Organic Carbon dag kg-1 1.60 1.80 2.00 2.20 0 -20 -40 -60 Depth cm -80 -100 -120 -140 CT SP
  22. 22. CONCLUSIONS • The Cerrado tree, Pterodon emarginatus, in SPS, extracted more Ca and Mg from 0-20 cm layers than pasture alone. • Fertilization of SPS might increase the pasture production up to the light limit.
  23. 23. ...CONCLUSIONS • SPS had higher levels of organic carbon and organic matter; • Organic carbon increased soil equilibrium fertility and captured and sequestered carbon from atmosphere.
  24. 24. THANK YOU! 19/2/2014 28
  25. 25. ACKNOWLEGMENTS • Amilton Naves, the owner of the farm where the experiment took place; • Colegiado do Programa de Pós-graduação em Zootecnia da Escola de Veterinaria da Universidade Federal de Minas Gerais, which financed the participation in the congress; • Prof. PK Nair, Prof. Vimala Nair and Gregory Toth who exchanged knowledge at University of Florida; • Laboratorio de Analise de Solos e Calcarios da Universidade Federal de Uberlandia • CAPES, Exagro, Cnpq
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