《Table 1–Soil physiochemical properties and total selenium (Se) concentration in Dashan region.》

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《Two selenium tolerant Lysinibacillus sp. strains are capable of reducing selenite to elemental Se efficiently under aerobic conditions》

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The data marked by different letters are significantly different at P<0.05.Sampling sites Se1 to Se4 represent the plots where the Se-rich soil samples were collected.

All of the soil samples were acidic with p H values ranged from4.81 to 6.86.The soils contained moderate organic matter，available N and total P，but had low Olsen P，especially for site Se4，which was characterized by extremely high available N and low Olsen P.Total Se of the four sites exhibited a gradient increase ranged widely from 1.16 to 4.68 mg/kg（Table 1）.Pearson correlation analysis indicated that total Se was positively correlated to organic matter and available N（P<.05）but negatively correlated to p H and Olsen P（P<.01）.