Abstract:

In order to understand the P demands of Camellia oleifera Abel clones, acid phosphatase activity(APA) were studied in the leaves and roots of different potted clones under different levels of phosphorus addition .The potted Camellia oleifera Abel clones were subjected to three supply levels(0、0.05、0.5mmol/L). The results showed that the activities of APA secreted by roots, in the leaves and roots under the low P levels treatment(P0、P1) were higher than those under normal P treatment. (P2). There were significant differences in the abilities of the different Camellia oleifera Abel clones to adapt to low P levels. unde the P-defieiency, Acid phosphatase(APA) activity secreted by roots of XL81 and XL4 were higher than other clones, which means XL81 and XL4 can fine use P immobilizated in soil to adapt to low P levels. Acid phosphatase (APA) activity was much higher in leaves and roots of XL67 than that of other clones. It showed that XL67 made the organic P adapt to low P levels. By Correlation analysis, there was a big positive correlation between APase activity in root and net photosynthetic rate, and there was also positive correlation between APase activity in leaves and net photosynthetic rate.