Photosynthesis and transpiration of Artemisia sacrorum were studied using the Li-6400 portable photosynthesis system in Loess Plateau region. The results showed that the diurnal variation of net photosynthetic rate (P_n) in A. sacrorum was single-peak curves from June to September. The diurnal variation of P_n was a bimodal curve and photosynthesis got into midday depression at 14:00 in May. The light compensation point (LCP) and the light saturation point (LSP) of A.sacrorum were 44.1 μmol·m~ -2 s~ -1 and ...
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