Abstract
Growth performance, biomass allocation and chlorophyll content of Afzelia xylocarpa Craib, Anisoptera costata Korthals, Dalbergia cochinchinensis Pierre, Dipterocarpus alatus Roxb. & G.Don and Hopea odorata Roxb. seedlings were compared under different light intensities (100%, 50-70 % and 30-50%) in Lao PDR. Results showed that all species had survival rate above 94 % under all light intensity treatments. Root collar diameter growth (RCD) varied signifi cantly among the fi ve species (F=10.91, P=0.0018). Afzelia xylocarpa had signifi cantly higher RCD than other species while A. costata and D. cochinchinensis showed higher RCD under higher light intensity. Height was also affected signifi cantly by light intensities among the species tested (F=4.85, P=0.0223). A. xylocarpa showed better height growth at lower light intensity. The number of leaves showed signifi cant differences among species (F=9.191, P=0.004) but was not signifi cantly different among light intensities (p<0.05). Biomass allocation was not signifi cantly different within and among species (F=3.39, P=0.0665) under different light intensities (F=2.72, P=0.096). Both A. xylocarpa and D. alatus accumulated higher total biomass under 50-70 % light intensity compared to other light conditions. Hopea odorata showed increasing biomass with increasing light intensity but A. costata accumulated more biomass at lower light intensity. The experiment also found that total chlorophyll content was signifi cantly different among species (p<0.05). This study showed that each species had different adaptations to light conditions that should be considered in nursery practice for optimum growth of seedlings.
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Claims 16
Claim · model-written summary
All five seedling species survived above 94% under all light intensities.
Verbatim
t0“Five Tropical Deciduous Seedlings”
e0“all species had survival rate above 94 % under all light intensity treatments”
Claim · model-written summary
Root collar diameter growth differed significantly among the five species.
Verbatim
t0“Five Tropical Deciduous Seedlings”
e0“Root collar diameter growth (RCD) varied signifi cantly among the fi ve species (F=10.91, P=0.0018).”
Claim · model-written summary
Afzelia xylocarpa had higher root collar diameter growth than the other species.
- Taxon
- Afzelia xylocarpa
Afzelia xylocarpae0 - Outcome
- RCDe0
- Direction
- highere0
- Comparator
- other speciese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Afzelia xylocarpa had signifi cantly higher RCD than other species”
Claim · model-written summary
Anisoptera costata had higher root collar diameter growth under higher light intensity.
- Taxon
- Anisoptera costata
Anisoptera costatae1 - Treatment
- higher light intensitye0
- Outcome
- RCDe0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A. costata and D. cochinchinensis showed higher RCD under higher light intensity”
e1“Anisoptera costata Korthals”
Claim · model-written summary
Dalbergia cochinchinensis had higher root collar diameter growth under higher light intensity.
- Taxon
- Dalbergia cochinchinensis
Dalbergia cochinchinensise1 - Treatment
- higher light intensitye0
- Outcome
- RCDe0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A. costata and D. cochinchinensis showed higher RCD under higher light intensity”
e1“Dalbergia cochinchinensis Pierre”
Claim · model-written summary
Seedling height was significantly affected by light intensity among species.
- Taxon
- Five Tropical Deciduous Seedlingst0
- Treatment
- light intensitiese0
- Outcome
- Heighte0
- Qualifier
- F=4.85, P=0.0223e0
Not reportedDirection
Verbatim
t0“Five Tropical Deciduous Seedlings”
e0“Height was also affected signifi cantly by light intensities among the species tested (F=4.85, P=0.0223).”
Claim · model-written summary
Afzelia xylocarpa grew taller at lower light intensity.
- Taxon
- Afzelia xylocarpaAfzelia xylocarpae1
- Treatment
- lower light intensitye0
- Outcome
- height growthe0
- Direction
- bettere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A. xylocarpa showed better height growth at lower light intensity.”
e1“Afzelia xylocarpa Craib”
Claim · model-written summary
Leaf number differed significantly among species.
Verbatim
t0“Five Tropical Deciduous Seedlings”
e0“The number of leaves showed signifi cant differences among species (F=9.191, P=0.004)”
Claim · model-written summary
Leaf number did not differ significantly across light intensities.
Verbatim
t0“Five Tropical Deciduous Seedlings”
e0“was not signifi cantly different among light intensities (p<0.05)”
e1“The number of leaves”
Claim · model-written summary
Biomass allocation did not differ significantly within or among species across light intensities.
Verbatim
t0“Five Tropical Deciduous Seedlings”
e0“Biomass allocation was not signifi cantly different within and among species (F=3.39, P=0.0665) under different light intensities (F=2.72, P=0.096).”
Claim · model-written summary
Afzelia xylocarpa accumulated more biomass at 50-70 % light intensity than other light conditions.
- Taxon
- Afzelia xylocarpaAfzelia xylocarpae1
- Treatment
- 50-70 % light intensitye0
- Outcome
- total biomasse0
- Direction
- highere0
- Comparator
- other light conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both A. xylocarpa and D. alatus accumulated higher total biomass under 50-70 % light intensity compared to other light conditions.”
e1“Afzelia xylocarpa Craib”
Claim · model-written summary
Dipterocarpus alatus accumulated more biomass at 50-70 % light intensity than other light conditions.
- Taxon
- Dipterocarpus alatus
Dipterocarpus alatuse1 - Treatment
- 50-70 % light intensitye0
- Outcome
- total biomasse0
- Direction
- highere0
- Comparator
- other light conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both A. xylocarpa and D. alatus accumulated higher total biomass under 50-70 % light intensity compared to other light conditions.”
e1“Dipterocarpus alatus Roxb.”
Claim · model-written summary
Hopea odorata biomass increased with light intensity.
- Taxon
- Hopea odorata
Hopea odoratae0 - Treatment
- increasing light intensitye0
- Outcome
- biomasse0
- Direction
- increasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hopea odorata showed increasing biomass with increasing light intensity”
Claim · model-written summary
Anisoptera costata accumulated more biomass at lower light intensity.
- Taxon
- Anisoptera costataAnisoptera costatae1
- Treatment
- lower light intensitye0
- Outcome
- biomasse0
- Direction
- moree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A. costata accumulated more biomass at lower light intensity”
e1“Anisoptera costata Korthals”
Claim · model-written summary
Total chlorophyll content differed significantly among species.
Verbatim
t0“Five Tropical Deciduous Seedlings”
e0“total chlorophyll content was signifi cantly different among species (p<0.05)”
Claim · model-written summary
Nursery practice should account for species differences in adaptation to light conditions.
Verbatim
t0“Five Tropical Deciduous Seedlings”
e0“each species had different adaptations to light conditions that should be considered in nursery practice for optimum growth of seedlings.”