Abstract
The responses of B. brizantha, B. decumbens and B. dictyoneura to shade and defoliation were examined in a glasshouse study. These combined stresses imposed severe constraints to growth and biomass production in all grasses. Shade alone reduced biomass linearly by 60–75% as irradiance decreased from 100% to 40%. There was no compensatory regrowth in any species and defoliation further reduced biomass accumulation. All grasses showed increased leaf N concentration, specifi c leaf area and chlorophyll concentration and fl uorescence under shading. Overall, B. decumbens was the most productive under all sets of conditions and appears the best suited of the species tested to silvopastoral cultivation under moderate shade. Further studies under fi eld conditions, where water and nutrients could be limiting, are warranted before the results could be extrapolated to commercial conditions.
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Claims 8
Claim · model-written summary
Combined shade and defoliation severely constrained grass growth and biomass.
- Taxon
- Brachiaria
Brachiariat0 - Treatment
- shade and defoliatione1
- Outcome
- growth and biomass productione0
- Direction
- severe constraintse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These combined stresses imposed severe constraints to growth and biomass production in all grasses.”
t0“forage grass Brachiaria”
e1“shade and defoliation”
Claim · model-written summary
Shade reduced biomass linearly by 60–75% as irradiance fell from 100% to 40%.
- Taxon
- BrachiariaBrachiariat0
- Treatment
- Shadee0
- Outcome
- biomasse0
- Direction
- reducede0
- Value
- 60–75%e0
- Qualifier
- irradiance decreased from 100% to 40%e0
- Comparator
- 100%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shade alone reduced biomass linearly by 60–75% as irradiance decreased from 100% to 40%.”
t0“forage grass Brachiaria”
Claim · model-written summary
No species showed compensatory regrowth after defoliation.
- Taxon
- BrachiariaBrachiariat0
- Treatment
- defoliatione1
- Outcome
- no compensatory regrowthe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no compensatory regrowth in any species”
t0“forage grass Brachiaria”
e1“defoliation further reduced biomass accumulation”
Claim · model-written summary
Defoliation further reduced biomass accumulation.
- Taxon
- BrachiariaBrachiariat0
- Treatment
- defoliatione0
- Outcome
- biomass accumulatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“defoliation further reduced biomass accumulation.”
t0“forage grass Brachiaria”
Claim · model-written summary
Shade increased leaf nitrogen concentration, specific leaf area, and chlorophyll concentration.
- Taxon
- BrachiariaBrachiariat0
- Treatment
- shadinge0
- Outcome
- leaf N concentration, specifi c leaf area and chlorophyll concentratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All grasses showed increased leaf N concentration, specifi c leaf area and chlorophyll concentration and fl uorescence under shading.”
t0“forage grass Brachiaria”
Claim · model-written summary
Shade increased leaf fluorescence.
- Taxon
- BrachiariaBrachiariat0
- Treatment
- shadinge0
- Outcome
- fl uorescencee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All grasses showed increased leaf N concentration, specifi c leaf area and chlorophyll concentration and fl uorescence under shading.”
t0“forage grass Brachiaria”
Claim · model-written summary
B. decumbens was the most productive across tested conditions.
- Taxon
- B. decumbens
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Urochloa decumbense0 - Outcome
- most productivee0
- Direction
- most productivee0
- Comparator
- B. brizantha, B. decumbens and B. dictyoneurae1
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Overall, B. decumbens was the most productive under all sets of conditions”
e1“The responses of B. brizantha, B. decumbens and B. dictyoneura”
Claim · model-written summary
The authors consider B. decumbens best suited to silvopastoral cultivation under moderate shade.
- Taxon
- B. decumbensUrochloa decumbense0
- Outcome
- best suited of the species tested to silvopastoral cultivation under moderate shadee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“B. decumbens was the most productive under all sets of conditions and appears the best suited of the species tested to silvopastoral cultivation under moderate shade.”
The same questions in other papers
shade · growth · BrachiariaPositive and negative results
1 in the opposite direction
- positive
shade · yield · BrachiariaResults agree
1 paper in the same direction as this paper
- 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.