Abstract
The escalation of global nitrogen deposition levels has heightened the inhibitory impact of phosphorus limitation on plant growth in subtropical forests. Plant roots area particularly sensitive tissue to nitrogen and phosphorus elements. Changes in the morphological characteristics of plant roots signify alterations in adaptive strategies. However, our understanding of resource-use strategies of roots in this environment remains limited. In this study, we conducted a 10-month experiment at the Castanopsis kawakamii Nature Reserve to evaluate the response of traits of seedling roots (such as specific root length, average diameter, nitrogen content, and phosphorus content) to nitrogen and phosphorus addition. The aim was to reveal the adaptation strategies of roots in different nitrogen and phosphorus addition concentrations. The results showed that: (1) The single phosphorus and nitrogen–phosphorus interaction addition increased the specific root length, surface area, and root phosphorus content. In addition, single nitrogen addition promotes an increase in the average root diameter. (2) Non-nitrogen phosphorus addition and single nitrogen addition tended to adopt a conservative resource-use strategy to maintain growth under low phosphorus conditions. (3) Under the single phosphorus addition and interactive addition of phosphorus and nitrogen, the roots adopted an acquisitive resource-use strategy to obtain more available phosphorus resources. Accordingly, the adaptation strategy of seedling roots can be regulated by adding appropriate concentrations of nitrogen or phosphorus, thereby promoting the natural regeneration of subtropical forests.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Phosphorus addition increased seedling root specific length, surface area, and phosphorus content.
- Taxon
- seedlinge1
- Organ / stage
- roote0
- Treatment
- single phosphoruse0
- Outcome
- specific root length, surface area, and root phosphorus contente0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“The single phosphorus and nitrogen–phosphorus interaction addition increased the specific root length, surface area, and root phosphorus content”
e1“traits of seedling roots”
Claim · model-written summary
Combined nitrogen and phosphorus addition increased seedling root specific length, surface area, and phosphorus content.
- Taxon
- seedlinge1
- Organ / stage
- roote0
- Treatment
- nitrogen–phosphorus interaction additione0
- Outcome
- specific root length, surface area, and root phosphorus contente0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“The single phosphorus and nitrogen–phosphorus interaction addition increased the specific root length, surface area, and root phosphorus content”
e1“traits of seedling roots”
Claim · model-written summary
Nitrogen alone increased average seedling root diameter.
- Taxon
- seedlinge1
- Organ / stage
- roote0
- Treatment
- single nitrogen additione0
- Outcome
- average root diametere0
- Direction
- increasee0
Not reportedComparator
Verbatim
e0“single nitrogen addition promotes an increase in the average root diameter”
e1“traits of seedling roots”
Claim · model-written summary
Under non-nitrogen phosphorus addition, seedling roots tended toward a conservative resource-use strategy.
- Taxon
- seedlinge1
- Treatment
- Non-nitrogen phosphorus additione0
- Outcome
- conservative resource-use strategye0
- Qualifier
- under low phosphorus conditionse0
Not reportedComparatorDirection
Verbatim
e0“Non-nitrogen phosphorus addition and single nitrogen addition tended to adopt a conservative resource-use strategy to maintain growth under low phosphorus conditions”
e1“traits of seedling roots”
Claim · model-written summary
Under nitrogen alone, seedling roots tended toward a conservative resource-use strategy at low phosphorus.
- Taxon
- seedlinge1
- Treatment
- single nitrogen additione0
- Outcome
- conservative resource-use strategye0
- Qualifier
- under low phosphorus conditionse0
Not reportedComparatorDirection
Verbatim
e0“Non-nitrogen phosphorus addition and single nitrogen addition tended to adopt a conservative resource-use strategy to maintain growth under low phosphorus conditions”
e1“traits of seedling roots”
Claim · model-written summary
Under phosphorus alone, seedling roots adopted an acquisitive resource-use strategy.
- Taxon
- seedlinge1
- Organ / stage
- rootse0
- Treatment
- single phosphorus additione0
- Outcome
- acquisitive resource-use strategye0
Not reportedComparatorDirection
Verbatim
e0“Under the single phosphorus addition and interactive addition of phosphorus and nitrogen, the roots adopted an acquisitive resource-use strategy to obtain more available phosphorus resources”
e1“traits of seedling roots”
Claim · model-written summary
Under combined phosphorus and nitrogen, seedling roots adopted an acquisitive resource-use strategy.
- Taxon
- seedlinge1
- Organ / stage
- rootse0
- Treatment
- interactive addition of phosphorus and nitrogene0
- Outcome
- acquisitive resource-use strategye0
Not reportedComparatorDirection
Verbatim
e0“Under the single phosphorus addition and interactive addition of phosphorus and nitrogen, the roots adopted an acquisitive resource-use strategy to obtain more available phosphorus resources”
e1“traits of seedling roots”
Claim · model-written summary
The authors conclude that suitable nitrogen or phosphorus additions can regulate seedling root adaptation and promote natural regeneration.
Verbatim
e0“the adaptation strategy of seedling roots can be regulated by adding appropriate concentrations of nitrogen or phosphorus, thereby promoting the natural regeneration of subtropical forests”