Plant Biomass Allocation-Regulated Nitrogen and Phosphorus Addition Effects on Ecosystem Carbon Fluxes of a Lucerne (<i>Medicago sativa</i> ssp. <i>sativa</i>) Plantation in the Loess Plateau.

The NEP, ER, and GEP presented significant logarithmic relationships with precipitation across all cuts of lucerne ( Figure 7 A), and they exhibited quadratic relationships with air temperature and surface horizontal radiation, showing an initial increase followed by a decreasing trend ( Figure 7 B,C). 3.

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