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应用稀土元素硝酸亚铈〔Ｃｅ（ＮＯ３）３·６Ｈ２Ｏ〕配制成浓度分别为１００ｍｇ／Ｌ、２００ｍｇ／Ｌ、４００ｍｇ／Ｌ、６００ｍｇ／Ｌ的水溶液，对大扁杏二年生树苗进行喷施处理。７ｄ后对大扁杏的光合作用和抗旱性能有关的生理指标进行测定。试验结果表明，光合强度和抗旱性都有所增加。４００ｍｇ／Ｌ的处理效果最好。
Application of rare earth element cerium nitrate [Ce (NO3) 3 · 6H2O] to the concentration of 100mg / L, 200mg / L, 400mg / L, 600mg / L of the aqueous solution of P. apricot biennial saplings spray treatment. After 7d, the physiological indexes related to the photosynthesis and drought resistance of P. nigrum were determined. The experimental results show that the photosynthetic intensity and drought resistance have increased. 400mg / L of the best treatment.