Phosphorus fractions and oxygen isotope composition of inorganic phosphate in typical agricultural soils
2020
Tian, Liyan | Guo, Qingjun | Yu, Guirui | Zhu, Yongguan | Lang, Yunchao | Wei, Rongfei | Hu, Jian | Yang, Xiaoru | Ge, Tida
Phosphorus (P), despite being an essential nutrient element for plants growth in agricultural ecosystem, the low utilization rate of soil P and the environmental problems caused by soil P losses are serious. Therefore, scoping knowledge of the possible sources and utilization extent of soil P by microorganisms is very helpful for better understanding of promoting P utilization for sustainable agriculture. Oxygen isotope of phosphate technology is an effective tool to trace the sources of P. In this study, P contents and oxygen isotope composition of inorganic phosphate (δ¹⁸OP) of different pools (H₂O-P, NaHCO₃-P, NaOH-P, and HCl-P) in typical agricultural soil from Northeast China and Central China were analyzed and quantified. The results showed that fertilizer and land use were important factors influencing the contents of H₂O-Pₜ and NaHCO₃-Pₜ and the soil TP contents from different types of soils were greatly affected by soil weathering degree. The δ¹⁸OP of different P pools indicated that the difference in utilization extent of different P fractions by microorganisms and the δ¹⁸OP values of different P fractions could be due to accumulation of multiple factors. The results will provide effective information for further study on sources and effective utilization of different P fractions in soil.
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by National Agricultural Library