根际
磷
环境化学
磷酸盐
红树林
镉
生物利用度
遗传算法
沉积物
化学
生物浓缩
海湾
植物
生物
生态学
生物累积
地质学
生物化学
细菌
古生物学
有机化学
海洋学
生物信息学
遗传学
标识
DOI:10.1080/15226514.2016.1278425
摘要
Mangrove [Kandelia obovata (S. L.)] seedlings were cultivated in rhizoboxes under different rates of phosphorus (P) and cadmium (Cd) level. The speciation distributions of P both in the rhizosphere and non-rhizosphere sediments were examined using sequential extraction procedures. P contents in different K. obovata (S.L.) tissues were also determined. Results showed that considerable differences existed in P speciation distribution between rhizosphere and bulk sediments. A higher proportion of iron-bound phosphate (Fe-P) was found in the rhizosphere sediments, while a relatively higher concentration of exchangeable phosphate (Ex-P) and Aluminum-bound phosphate was found in the bulk sediments. P accumulation in plant tissues was significantly positively correlated to Ex-P and Fe-P. Results indicated that root activities play an important role in the P cycling. And the coexistence of P and Cd induced higher P accumulation in mangrove plants. It is suggested that the root-induced chemical and biological changes in the rhizosphere environment play an important role in enhancing the bioavailability of soil P.
科研通智能强力驱动
Strongly Powered by AbleSci AI