Wang Zhen-yu, Wen Sheng-fang, Luo Xian-xiang, Li Ai-feng, Xing Bao-shan, Li Feng-min
College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China.
Huan Jing Ke Xue. 2009 Aug 15;30(8):2248-52.
A mini-rhizotron experiment with Alternanthera philoxeroides and Typha latifolia was conducted to measure the spatial and temporal dynamics of phosphorus in the rhizosphere solution. The organic acids in the in situ rhizosphere soil solution were analyzed. A decreasing phosphorus concentration gradient in soil solution toward the root was observed for both A. philoxeroides and T. latifolia. The phosphorus concentration in the rhizosphere soil solution of A. philoxeroides (2.53 mg x L(-1)) was lower than that of T. latifolia (5.43 mg x L(-1)) in the forth sampling day. Compared to T. latifolia, A. philoxeroides released more malic acid (27.33 umol x L(-1)) which was more efficient in phosphorus mobilization. A. philoxeroides was more effective in phosphorus uptake in the rhizosphere than T. latifolia.
进行了一项关于空心莲子草和宽叶香蒲的微型根际箱实验，以测量根际溶液中磷的时空动态。分析了原位根际土壤溶液中的有机酸。对于空心莲子草和宽叶香蒲，均观察到土壤溶液中朝向根部的磷浓度梯度降低。在第四个采样日，空心莲子草根际土壤溶液中的磷浓度（2.53毫克/升）低于宽叶香蒲（5.43毫克/升）。与宽叶香蒲相比，空心莲子草释放出更多的苹果酸（27.33微摩尔/升），其在磷的活化方面更有效。空心莲子草在根际对磷的吸收比宽叶香蒲更有效。
