应用不同浓度的稀土对黑穗醋栗新品种“黑珍珠”进行了叶面喷施试验。结果表明，低浓度（３００～８００ｍｇ／Ｌ）处理能明显提高叶片叶绿素ａ和ｂ的含量，从而使叶绿素总量增加，提高了净光合速率（Ｐｎ），对叶片光量子通量密度（ＰＦＤ）、气孔导度（Ｇｓ）和蒸腾速率（ＴＲ）均有良好影响；提高了叶片硝酸还原酶（ＮＲ）活性，有利于氮素代谢。高浓度处理出现抑制作用。从本试验看，以低浓度处理喷２次较为适宜。 Application of different concentrations of rare earth black currant new varieties of “black pearl” were sprayed on the leaves. The results showed that chlorophyll a and b contents were significantly increased at low concentration (300-800 mg / L), the total chlorophyll content increased, Pn increased, leaf photosynthetic rate (PFD), photosynthetic rate Stomatal conductance (Gs) and transpiration rate (TR) all had good effects on the activity of nitrate reductase (NR), which was beneficial to nitrogen metabolism. Inhibition of high concentration treatment. From this test, it is more appropriate to spray 2 times at low concentration.