Abstract
This study evaluated pasture productivity and nutritional characteristics of Urochloa decumbens in silvopastoral systems (SPS) with different eucalyptus cultivars and spatial arrangements providing differing levels of shade. SPS were arranged to provide 46 % shade (eucalyptus trees arranged in 2 double rows 2 m apart, with trees every 3 m in each row, and 20 m between double rows), 60 % shade (eucalyptus trees arranged in 2 double rows 2 m apart, with trees every 2 m in each row in double rows and 9 m between double rows) and 57 % shade (eucalyptus trees arranged in a single row, with trees every 2 m in the row and 9 m between rows) using eucalyptus cultivars ‘GG100’, ‘I144’ or ‘VM58’. Two full sun pastures treated as managed (soil pH correction and N, P and K fertilizer application) or non-managed (no correction or fertilizer application) were evaluated in addition to the 3 SPS arrangements. Photosynthetically active radiation (PAR) was 1,439 μmol/m2/s in full sun compared with a mean of 715 μmol/m2/s under different SPS arrangements. Leaf area index of U. decumbens was 28 % higher in 46 % shade and lower in all shade arrangements compared with full sun managed pasture. The dry matter yield was 58 % lower in 46 % shade and 86 % lower in 60 % shade compared with full sun managed pasture. The crude protein content in SPS pastures was higher than in the full sun pastures, with higher values in 57 % and 60 % shade. SPS significantly reduced the PAR and forage yield. These results indicate that in systems where the main objective is animal production, spacing between tree rows greater than 20 m should be used to provide sufficient high-quality grass.
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Claims 7
Claim · model-written summary
Silvopastoral arrangements had lower PAR than full sun.
- Taxon
- Urochloa decumbens
.jpg?width=60)
Urochloa decumbenst0 - Outcome
- Photosynthetically active radiation (PAR)e0
- Value
- 715 μmol/m2/se0
- Comparator
- full sune0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Photosynthetically active radiation (PAR) was 1,439 μmol/m2/s in full sun compared with a mean of 715 μmol/m2/s under different SPS arrangements.”
t0“Urochloa decumbens”
Claim · model-written summary
Leaf area index was 28% higher under 46% shade.
- Taxon
- U. decumbensUrochloa decumbense1
- Treatment
- 46 % shadee0
- Outcome
- Leaf area indexe0
- Direction
- highere0
- Value
- 28 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf area index of U. decumbens was 28 % higher in 46 % shade”
e1“Leaf area index of U. decumbens”
Claim · model-written summary
Shaded pasture leaf area index was lower than managed full sun pasture.
- Taxon
- U. decumbensUrochloa decumbense1
- Treatment
- all shade arrangementse0
- Outcome
- Leaf area indexe1
- Direction
- lowere0
- Comparator
- full sun managed pasturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lower in all shade arrangements compared with full sun managed pasture.”
e1“Leaf area index of U. decumbens”
Claim · model-written summary
Dry matter yield was 58% lower under 46% shade.
- Taxon
- Urochloa decumbensUrochloa decumbenst0
- Treatment
- 46 % shadee0
- Outcome
- dry matter yielde0
- Direction
- lowere0
- Value
- 58 %e0
- Comparator
- full sun managed pasturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The dry matter yield was 58 % lower in 46 % shade and 86 % lower in 60 % shade compared with full sun managed pasture.”
t0“Urochloa decumbens”
Claim · model-written summary
Dry matter yield was 86% lower under 60% shade.
- Taxon
- Urochloa decumbensUrochloa decumbenst0
- Treatment
- 60 % shadee0
- Outcome
- dry matter yielde0
- Direction
- lowere0
- Value
- 86 %e0
- Comparator
- full sun managed pasturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The dry matter yield was 58 % lower in 46 % shade and 86 % lower in 60 % shade compared with full sun managed pasture.”
t0“Urochloa decumbens”
Claim · model-written summary
Crude protein was higher under silvopastoral systems than full sun.
- Taxon
- Urochloa decumbensUrochloa decumbenst0
- Treatment
- SPS pasturese0
- Outcome
- crude protein contente0
- Direction
- highere0
- Comparator
- full sun pasturese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The crude protein content in SPS pastures was higher than in the full sun pastures, with higher values in 57 % and 60 % shade.”
t0“Urochloa decumbens”
Claim · model-written summary
Authors recommend tree rows wider than 20 m for animal production.
- Taxon
- Urochloa decumbensUrochloa decumbenst0
- Outcome
- spacing between tree rows greater than 20 me0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“spacing between tree rows greater than 20 m should be used to provide sufficient high-quality grass.”
t0“Urochloa decumbens”
The same questions in other papers
shade · growth · Urochloa decumbensResults agree
1 paper in the same direction as this paper
- positive
shade · yield · Urochloa decumbensResults agree
2 papers in the same direction as this paper
- negative
- negative
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.