| Institution: | 1.College of Environment and Energy,South China University of Technology,Guangzhou,People’s Republic of China;2.School of environment,Nanjing University,Nanjing,People’s Republic of China;3.The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters,Ministry of Education,Guangzhou,China;4.The Key Laboratory of Environmental Protection and Eco-Remediation of Guangdong Regular Higher Education Institutions,Guangzhou,People’s Republic of China;5.State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou,People’s Republic of China |
| Abstract: | PurposeThe aim of this study was to evaluate the role of phosphine in the mobilization of phosphorus in the rhizosphere soil of rice seedlings and to determine the relative efficiency of phosphine in plant P acquisition.Materials and methodsAn indoor simulation experiment was conducted and the matrix-bound phosphine (MBP), phosphorus fractions, and phosphatase activity in the rhizosphere soil samples from rice cultivation, biomass, the plant P, and the root system activity were measured under different phosphine concentrations (0, 1.4, 4.2, and 7.0 mg m?3) for a period of 30 days.Results and discussionThe results indicated that phosphine treatments enhanced MBP, inorganic P (resin–Pi, NaHCO3–Pi, and NaOH–Pi), and phosphatase activity, as well as the root system activity, and the content of P in the rice seedlings was stimulated with increasing phosphine concentrations. However, organic P (NaHCO3–Po and NaOH–Po) accumulation occurred in the rhizosphere of the rice seedlings. In addition, the content of organic P in the soil samples decreased with increased phosphine concentration.ConclusionsTherefore, relatively high concentrations of phosphine in paddy field could have a positive impact on the effectiveness of phosphorus in rice plants via influencing the rhizosphere properties. |
