Responses of litter decomposition and nutrient release of Bothriochloa ischaemum to soil petroleum contamination and nitrogen fertilization
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To assess the effects of petroleum contamination or fertilization with nitrogenous fertilizer in contaminated soil on the litter decomposition of Bothriochloa ischaemum, a phytoremediating species, its litter was placed in litterbags and buried in uncontaminated soil, and petroleum-contaminated soil with and without urea fertilization (petroleum concentration: 45 g/kg, the ratio of soil C/N was adjusted to 25:1 after urea fertilization) for a 6-month decomposition experiment at consistent soil moisture and room temperature (20–25 °C). The results indicated that petroleum contamination significantly inhibited the overall decomposition (the turnover period was extended by 44.35%) and nutrient release (the release of P, K and Fe was inhibited, while the release of N and Zn was accelerated) of B. ischaemum litter, while N fertilization significantly intensified the inhibitory effects of petroleum contamination (significantly extended the turnover period of decomposition by 36.71% again and simultaneously inhibited the release of C, N, P and Zn). Consequently, this research suggests that additional measures should be simultaneously used with phytoremediation to alleviate the inhibitory effects of petroleum on B. ischaemum litter decomposition. However, fertilizing the contaminated soil with urea might cause potential disadvantages, and it should not be applied in conjunction with phytoremediation.
KeywordsPhytoremediation Petroleum contamination Soil biological properties Nitrogen fertilization Litter decomposition
The authors thank Dr. Nhu Trung Luc for his help in the experiments. This research was supported by the Specialized Research Fund for the Doctoral Program of Yan’an University (YDBK2017-26) and the National Natural Science Foundation of China (31501342).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
- Bao S (2000) Soil agro-chemistrical analysis. China Agriculture Press, BeijingGoogle Scholar
- Bento RA, Saggin-Júnior OJ, Pitard RM, Straliotto R, da Silva EMR, de Lucena Tavares SR, de Landa FHTG, Martins LF, Volpon AGT (2012) Selection of leguminous trees associated with symbiont microorganisms for phytoremediation of petroleum-contaminated soil. Water Air Soil Pollut 223:5659–5671CrossRefGoogle Scholar
- Berg B, Mcclaugherty C (2014) Plant litter. Decomposition, humus formation, carbon sequestration, 3rd edn. Springer, Berlin HeidelbergGoogle Scholar
- Fernández-Calviño D, Bååth E (2010) Growth response of the bacterial community to pH in soils differing in pH. FEMS Microbiol Ecol 73:149–156Google Scholar
- Guan S (1986) Soil enzyme and research technology. Agriculture Press, BeijingGoogle Scholar
- Liu J, Song X, Sun R, Xie F, Wang R, Wang W (2014) Petroleum pollution and the microbial community structure in the soil of Shengli Oilfield Chinese. J Appl Ecol 25:850–856Google Scholar
- Lv G, Zhao J, Zhao L, Liao Y (1997) Primary study on the evaluation of raw oil pollution using soil enzyme activities in typical steppe region. Acta Sci Nat Univ NeiMongol 28:687–691Google Scholar
- Mckinley VL, Federle TW, Vestal JR (1982) Effects of petroleum hydrocarbons on plant litter microbiota in an arctic lake. Appl Environ Microbiol 43:129–135Google Scholar
- Nanjing Institute of Soil Science (1985) Analysis of soil microorganism. Science Press, BeijingGoogle Scholar
- Rahn JH (2012) A test method for the evaluation of soil microbial health in a petroleum hydrocarbon contaminated boreal forest soil. The University of GuelphGoogle Scholar
- Tu L, Hu T, Zhang J, Dai H, Li R, Xiang Y, Luo S (2011) Effect of simulated nitrogen deposition on nutrient release in decomposition of several litter fractions of two bamboo species. Acta Ecol Sin 31:1547–1557Google Scholar
- Zhang L (2013) The selection of tree and grass species to tolerate soil contamination in the Loess Plateau in Northern Shaanxi. Northwest A&F University, YanglingGoogle Scholar