结合桃树叶片氮和磷的含量以研究其光合效能的异同。以叶面积基数,叶肉传导力,及叶片水蒸汽的输导作用,表示光合作用同化CO2的效能直接与叶面积基数的含氮量相关(R2分别为0.908,0.921,0.685)。叶片胞间的CO2浓度随同化率和叶片含氮量的增加稍趋向减少,这表明限制CO2的同化作用? Combined with the content of nitrogen and phosphorus in peach leaves to study the similarities and differences of photosynthetic efficiency. Based on leaf area, leaf conductivity and leaf water vapor, the photosynthetic CO2 assimilation was directly related to the nitrogen content of leaf area (R2 = 0.908, 0.921, 0.685, respectively). The intercellular CO2 concentration tends to decrease slightly with increasing assimilation rate and increasing leaf nitrogen content, which indicates that CO2 assimilation is limited.