关键词: 稀土, 刺槐, 光合速率, 叶绿素含量, 水分利用效率, 矿质元素含量

Abstract:

The effects of mixed rare - earth elements of La and Ce on some physiological characteristics of Robinia pseudoaeacio one - year's seedlings (tree seedling, cuttings, root - cuttings) were studied. The results show that spraying the rare - earth elements solution in 700mg/kg on the leaves of R. pseudoaeacio, the net photosynthetic rate was increased by 33.8%- 40.3%, the content of chlorophyll was increased by 22.3%-33.1%, the water applying efficiency would be increased by 10.2%-14.0%. The total nitrogen, phosphate. And potassium content of the leaves can be increased respectively by 31.7%-46.1%, 22.0%-32.7% and 42.9%- 55.6%.

Key words: Rare-earth elements, Photosynthetic rate, Content of chlorophyll, Water utilization efficiency, Mineral content