Abstract
Relationships between species diversity, productivity, temporal stability of productivity, and plant invasion have been well documented in grasslands, and these relationships could translate to improved agricultural sustainability. However, few studies have explored these relationships in agricultural contexts where fertility and weeds are managed. Using 7 years of biomass yield and species composition data from 12 species mixture treatments varying in native species diversity, we found that species richness increased yield and interannual yield stability by reducing weed abundance. Stability was driven by yield as opposed to temporal variability of yield. Nitrogen fertilization increased yield but at the expense of yield stability. We show how relationships between diversity, species asynchrony, invasion, productivity, and stability observed in natural grasslands can extend into managed agricultural systems. Increasing bioenergy crop diversity can improve farmer economics via increased yield, reduced yield variability, and reduced inputs for weed control, thus promoting perennial vegetation on agricultural lands.
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Claims 6
Claim · model-written summary
Species richness increased biomass yield by reducing weed abundance.
Verbatim
e0“species richness increased yield and interannual yield stability by reducing weed abundance.”
t0“bioenergy crops”
Claim · model-written summary
Species richness increased interannual yield stability by reducing weed abundance.
Verbatim
e0“species richness increased yield and interannual yield stability by reducing weed abundance.”
t0“bioenergy crops”
Claim · model-written summary
Yield, rather than temporal yield variability, drove stability.
Verbatim
e0“Stability was driven by yield as opposed to temporal variability of yield.”
t0“bioenergy crops”
Claim · model-written summary
Nitrogen fertilization increased yield.
Not reportedComparator
Verbatim
e0“Nitrogen fertilization increased yield but at the expense of yield stability.”
t0“bioenergy crops”
Claim · model-written summary
Nitrogen fertilization reduced yield stability.
- Taxon
- bioenergy cropst0
- Treatment
- Nitrogen fertilizatione0
- Outcome
- yield stabilitye0
- Direction
- at the expense ofe0
Not reportedComparator
Verbatim
e0“Nitrogen fertilization increased yield but at the expense of yield stability.”
t0“bioenergy crops”
Claim · model-written summary
The authors conclude that increasing bioenergy crop diversity can improve farmer economics through yield gains, lower yield variability and reduced weed control inputs.
Verbatim
e0“Increasing bioenergy crop diversity can improve farmer economics via increased yield, reduced yield variability, and reduced inputs for weed control”