Abstract
The distribution of diameter class,stand canopy,and undergrowth plant diversity in Robinia pseudoaeacia plantation with different densities in the hilly area of the Loess Plateau were analyzed.Results show that the breast diameter class of stands presents a normal distribution when density of young-aged stands is 2 800 trees per hectare and a nearly normal distribution when density of young and middle-aged stands is 700~900 trees per hectare.Under the condition of the same stand age and site,leaf area index increases,while transparency and diversity and evenness index of plant species beyond forest canopy decrease with increased stand density.
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Claims 6
Claim · model-written summary
Stand diameter classes followed a normal distribution at 2 800 trees per hectare.
- Taxon
- Robinia Pseudoacacia
Robinia pseudoacaciat0 - Outcome
- breast diameter classe0
- Value
- 2 800 trees per hectaree0
Not reportedSettingDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the breast diameter class of stands presents a normal distribution when density of young-aged stands is 2 800 trees per hectare and a nearly normal distribution when density of young and middle-aged stands is 700~900 trees per hectare.”
t0“Robinia Pseudoacacia Plantation”
Claim · model-written summary
Stand diameter classes followed a nearly normal distribution at 700~900 trees per hectare.
- Taxon
- Robinia PseudoacaciaRobinia pseudoacaciat0
- Outcome
- breast diameter classe0
- Value
- 700~900 trees per hectaree0
Not reportedSettingDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the breast diameter class of stands presents a normal distribution when density of young-aged stands is 2 800 trees per hectare and a nearly normal distribution when density of young and middle-aged stands is 700~900 trees per hectare.”
t0“Robinia Pseudoacacia Plantation”
Claim · model-written summary
At the same stand age and site, increased density increased leaf area index.
- Taxon
- Robinia PseudoacaciaRobinia pseudoacaciat0
- Outcome
- leaf area indexe0
- Direction
- increasese0
- Qualifier
- same stand age and sitee0
- Comparator
- increased stand densitye0
Not reportedSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under the condition of the same stand age and site,leaf area index increases,while transparency and diversity and evenness index of plant species beyond forest canopy decrease with increased stand density.”
t0“Robinia Pseudoacacia Plantation”
Claim · model-written summary
At the same stand age and site, increased density decreased transparency.
- Taxon
- Robinia PseudoacaciaRobinia pseudoacaciat0
- Outcome
- transparencye0
- Direction
- decreasee0
- Qualifier
- same stand age and sitee0
- Comparator
- increased stand densitye0
Not reportedSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under the condition of the same stand age and site,leaf area index increases,while transparency and diversity and evenness index of plant species beyond forest canopy decrease with increased stand density.”
t0“Robinia Pseudoacacia Plantation”
Claim · model-written summary
At the same stand age and site, increased density decreased diversity.
- Taxon
- Robinia PseudoacaciaRobinia pseudoacaciat0
- Outcome
- diversitye0
- Direction
- decreasee0
- Qualifier
- same stand age and sitee0
- Comparator
- increased stand densitye0
Not reportedSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under the condition of the same stand age and site,leaf area index increases,while transparency and diversity and evenness index of plant species beyond forest canopy decrease with increased stand density.”
t0“Robinia Pseudoacacia Plantation”
Claim · model-written summary
At the same stand age and site, increased density decreased evenness index.
- Taxon
- Robinia PseudoacaciaRobinia pseudoacaciat0
- Outcome
- evenness indexe0
- Direction
- decreasee0
- Qualifier
- same stand age and sitee0
- Comparator
- increased stand densitye0
Not reportedSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under the condition of the same stand age and site,leaf area index increases,while transparency and diversity and evenness index of plant species beyond forest canopy decrease with increased stand density.”
t0“Robinia Pseudoacacia Plantation”