MOE Key Laboratory of Environment Remediation and Ecosystem Health, College of Environmental and Resource Science, Zhejiang University, Hangzhou, 310058, China.
Environ Sci Pollut Res Int. 2013 Nov;20(11):8237-44. doi: 10.1007/s11356-013-1801-z. Epub 2013 May 18.
The effects of plant debris on phosphorus sorption by anoxic sediment were investigated. Addition of plant debris significantly enhanced the decrease of soluble relative phosphorus (SRP) in overlying water at both 10 and 30 °C during the 30-day investigation. Both cellulose and glucose, two typical plant components, also clearly enhanced the SRP decrease in anoxic overlying water. The measurement of phosphorus (P) fractions in sediment revealed that the levels of unstable P forms were decreased by plant debris addition, whereas the opposites were true for stable P forms. However, under sterilized condition, plant debris/glucose addition has no effect on the SRP decrease in overlying water. Overall, our results suggested that plant debris improve P sorption into sediment under anoxic condition through a microorganism-mediated mechanism.
研究了植物碎屑对缺氧沉积物中磷吸附的影响。在 30 天的调查中，添加植物碎屑显著增强了 10 和 30°C 时上层水中可溶性相对磷（SRP）的减少。纤维素和葡萄糖这两种典型的植物成分也明显增强了缺氧上层水中 SRP 的减少。对沉积物中磷（P）形态的测量表明，添加植物碎屑降低了不稳定 P 形态的水平，而稳定 P 形态则相反。然而，在灭菌条件下，植物碎屑/葡萄糖的添加对上层水中 SRP 的减少没有影响。总的来说，我们的结果表明，植物碎屑通过微生物介导的机制改善了缺氧条件下磷向沉积物中的吸附。
