Scientia Silvae Sinicae ›› 1997, Vol. 33 ›› Issue (4): 374-379.
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Lanyong Zhao1,Yutang Liang1,Jiuling Wang2
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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
Lanyong Zhao,Yutang Liang,Jiuling Wang. THE EFFECT OF RARE-EARTH ELEMENTS ON PHYSIOLOGICAL CHARACTERISTICS OF ROBINIA PSEUDOAEACIO SEEDLINGS[J]. Scientia Silvae Sinicae, 1997, 33(4): 374-379.
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Fig.1
The relation of rare earth consistency to the content of chlorophyll"
Fig.2
The relation of rare earth consistency to photosynlhetic rate 1. 2. 3 Same as Fig 1"
Fig.3
The relation of the rare earth consistency to water utilization efficiency and photosynlhetic rate 1. 2. 3 Same as Fig 1"
Fig.4
The relation of the rare earth consistency to the content of total nitrogen of leaf 1.2.3 Same as Fig. 1"
Fig.5
The relation of the rare earth consistency to the content of phosphorus of leaves 1.2.3 Same as Fig. 1"
Fig.6
The relation of the rare earth consistencyto the content of potassium of leaves 1. 2. 3 the same as Fig. 1"
