Abstract
Abstract Current understanding of plant nutrient stoichiometry mainly focus on C, N, and P and in humid and tropic regions. This study was conducted to investigate nutrient stoichiometry in a semaird small watershed. Three dominant plants, Medicago sativa, Stipa bungeana, and Artemisia sacrorum, sampled along a natural nutrient gradient, were analyzed with respect to plant nutrient stoichiometry (N:P, N:K, and K:P). The results showed that nutrient stoichiometry varied greatly between plants and within the same plant at the small watershed scale. At the natural nutrient gradient, N:P of the N limited plant is mainly determined by plant N, while that of P or P+N limited plants were dominated by plant P. The N:K and K:P of both N limited and P or N+P limited plants were mainly controlled by plant K with weak relations to nutrient limitations. Aboveground biomass directly influences nutrient stoichiometry, while extractable soil nutrients exert their impacts on stoichiometry through aboveground biomass.
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Claims 6
Claim · model-written summary
Nutrient stoichiometry varied between plants and within a plant at watershed scale.
- Taxon
- Medicago sativa, Stipa bungeana, and Artemisia sacrorum
Medicago sativaStipa bungeana
Artemisia sacrorume0 - Outcome
- nutrient stoichiometrye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three dominant plants, Medicago sativa, Stipa bungeana, and Artemisia sacrorum, sampled along a natural nutrient gradient, were analyzed with respect to plant nutrient stoichiometry (N:P, N:K, and K:P). The results showed that nutrient stoichiometry varied greatly between plants and within the same plant at the small watershed scale”
Claim · model-written summary
N:P in N limited plants was mainly determined by plant N.
Not reportedDirection
Verbatim
e0“N:P of the N limited plant is mainly determined by plant N”
Claim · model-written summary
N:P in P or P+N limited plants was dominated by plant P.
- Taxon
- plantsViridiplantaee0
- Compound
- plant Pe0
- Outcome
- P+N limited plantse0
Not reportedDirection
Verbatim
e0“that of P or P+N limited plants were dominated by plant P”
Claim · model-written summary
N:K and K:P were mainly controlled by plant K with weak relation to nutrient limitations.
- Taxon
- plantsViridiplantaee0
- Compound
- plant Ke0
- Outcome
- N:K and K:Pe0
Not reportedDirection
Verbatim
e0“The N:K and K:P of both N limited and P or N+P limited plants were mainly controlled by plant K with weak relations to nutrient limitations”
Claim · model-written summary
Aboveground biomass directly influenced nutrient stoichiometry.
Not reportedTaxonDirection
Verbatim
e0“Aboveground biomass directly influences nutrient stoichiometry”
Claim · model-written summary
Extractable soil nutrients affected stoichiometry through aboveground biomass.
Not reportedTaxon
Verbatim
e0“extractable soil nutrients exert their impacts on stoichiometry through aboveground biomass”