Although both the warming and precipitation change treatment had a highly significant impact on the P n of S . grandis and L . chinensis , there is always a contradictory theory regarding the influence of stomatal limitation and nonstomatal limitation on P n under environmental stresses.
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Responses of plant biomass, photosynthesis and lipid peroxidation to warming and precipitation change in two dominant species (Stipa grandis and Leymus chinensis) from North China Grasslands.
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The sentences
Under higher precipitation levels ( W +15 and W +30 ), all the biomass indices showed a trend of rising first and then falling with increasing temperature.