Rhizosphere effect of different aquatic plants on phosphorus depletion

2008年第2卷第3期

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《环境科学与工程前沿（英文）》 >> 2008年第2卷第3期 doi: 10.1007/s11783-008-0048-2

Rhizosphere effect of different aquatic plants on phosphorus depletion

1.Key Laboratory of Ocean Ecology & Environment of Ministry of Education, College of Environmental Science and Engineering, Ocean University of China; 2.Key Laboratory of Ocean Ecology & Environment of Ministry of Education, College of Environmental Science and Engineering, Ocean University of China; Department of Plant, Soil and Insect Sciences, University of Massachusetts;

发布日期： 2008-09-05

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摘要

A series of pot experiments with , , and were conducted to assess the phosphorus depletion effect in the rhizosphere. The ratio of root to shoot, root morphology, phosphorus uptake efficiency and phosphorus utilization efficiency were analyzed. An obvious variation in phosphorus concentrations between the rhizosphere soil and non-rhizosphere soil was observed. The water-soluble P contents in the rhizosphere soil of , , and were reduced by 81%, 42%, 18% and 16%, respectively, compared with that in the non-rhizosphere soil. had the highest phosphorus uptake efficiency (1.32 mg/m), while achieved the effective phosphorus depletion by the strong rooting system and the high phosphorus uptake efficiency (0.52 mg/m). not only used phosphorus to produce biomass economically, but also adjusted carbon allocation to the roots to explore the soil for more available phosphorus. and were more effective in depleting phosphorus in the rhizosphere than and .