Effects of water-fertiliser coupling on the photosynthesis and quality of Lycium barbarum based on predicted crop evapotranspiration (ET<sub>c</sub>).

In terms of the chlorophyll content at the defoliation stage, the effect of irrigation volume on the basis of the predicted ET c on the chlorophyll content was highly significant ( P < 0.01) compared with that in the CK; for both W0-W1, the chlorophyll content increased; for W2–W3, the change in chlorophyll content was not significant, whereas for W4, the change in chlorophyll content decreased.

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