. 2017 Jul 28;7:6811. doi: 10.1038/s41598-017-07240-6

Table 1.

Plant species and soil factors at thirteen sites. Values were means and error variances (in parentheses). The values for soil factors were means and standard errors at two soil depths in nine sites. Common superscript letters on the mean values within a column indicate no significant difference at P > 0.05 using LSD tests.

Site	Spieces (Abbreviation)	Soil water content (%)		Soil soluble salt content (g kg⁻¹)		Soil total nitrogen concentration (mg g⁻¹)		Soil total phosphorus concentration (mg g⁻¹)		Soil organic carbon content (g kg⁻¹)
Site	Spieces (Abbreviation)	0–20 cm	20–100 cm	0–20 cm	20–100 cm	0–20 cm	20–100 cm	0–20 cm	20–100 cm	0–20 cm	20–100 cm
1	Ha, Ce	1.63^a (0.019)	1.28^a (0.015)	0.95^a (0.144)	2.76^a (0.352)	0.25^ab (0.024)	0.22^ab (0.020)	0.33^b (0.043)	0.28^bc (0.015)	1.41^a (0.016)	1.29^a (0.007)
2	Ha, Ce, Ph, Ss	1.45^a (0.132)	2.63^b (0.021)	3.15^ab (0.360)	4.27^a (0.207)	0.25^ab (0.011)	0.24^abc (0.006)	0.32^b (0.014)	0.26^ab (0.014)	1.39^a (0.079)	1.37^a (0.028)
3	Ha, Ce, Ph, Ss, As	1.21^a (0.034)	1.69^a (0.062)	1.23^a (0.105)	3.03^a (0.062)	0.26^ab (0.007)	0.26^bc (0.028)	0.27^a (0.014)	0.26^ab (0.006)	1.73^ab (0.036)	1.38^a (0.033)
4	Ha, Ce, Ph, Ss, As, Rs, Ns, Pa, Pe	0.90^a (0.008)	3.65^c (0.058)	7.79^ab (0.264)	7.30^b (0.564)	0.20^a (0.009)	0.18^a (0.002)	0.28^a (0.011)	0.27^bc (0.012)	1.77^ab (0.111)	1.61^a (0.036)
5	Ph, As, Rs, Ns, Pa, Pe, Tr, Kc, Kf	1.20^a (0.176)	3.95^c (0.247)	15.73^b (0.645)	9.18^b (0.194)	0.22^a (0.010)	0.19^a (0.004)	0.28^a (0.023)	0.24^ab (0.015)	1.87^ab (0.074)	1.46^a (0.074)
6	Ha, Ph, As, Rs, Ns, Pa, Pe, Kf, Hs	2.96^a (0.226)	9.04^d (0.266)	33.01^c (2.331)	19.73^c (0.414)	0.26^ab (0.007)	0.24^abc (0.015)	0.32^b (0.024)	0.31^c (0.015)	3.01^abc (0.132)	2.19^b (0.064)
7	Ha, Ph, Pa,Pe, Hh	5.29^b (0.162)	10.40^e (0.119)	41.41^c (1.091)	18.21^c (0.660)	0.27^ab (0.010)	0.31 ^cd (0.019)	0.29^ab (0.003)	0.28^bc (0.004)	3.65^bc (0.186)	2.49^b (0.116)
8	Ns, Pe, Av, Sm, Gu	20.03^e (1.314)	21.13^h (0.522)	138.63^e (8.207)	19.51^c (0.414)	2.01^c (0.064)	0.99^e (0.035)	0.32^b (0.007)	0.22^a (0.012)	29.43^e (1.871)	4.98^d (0.234)
9	Pa, Tr, Kc, Hh, Hc, Hs	9.79^c (1.396)	18.55^g (0.122)	88.68^d (8.742)	32.94^d (2.240)	0.32^b (0.025)	0.36^d (0.030)	0.28^a (0.006)	0.25^ab (0.003)	4.50^c (0.228)	3.66^c (0.159)
S1	Ha, Ns, Pa, Pe, Hh, Av, Sm	14.09^d (1.156)	13.62^f (0.985)	6.32^ab (0.237)	4.08^a (0.316)	0.27^ab (0.005)	0.23^ab (0.015)	0.27^a (0.009)	0.23^a (0.006)	5.83^c (0.368)	2.15^b (0.113)
S2	Ha, Ns, Pa, Tr, Kf, Av	10.35^c (1.205)	10.19^e (0.877)	4.61^ab (0.341)	4.26^a (1.301)	0.21^a (0.011)	0.20^a (0.006)	0.29^ab (0.017)	0.29^bc (0.014)	1.45^a (0.096)	1.05^a (0.008)
S3	Ha, As, Ns, Pe, Tr, Kc, Av, Hs	9.29^c (0.505)	10.91^e (0.743)	3.47^ab (0.054)	4.04^a (0.124)	0.21^a (0.009)	0.28^bc (0.018)	0.26^a (0.005)	0.24^ab (0.011)	2.65^ab (0.052)	1.85^ab (0.006)
S4	Ha, As, Ns, Pe, Kf, Av, Sm, Gu	14.38^d (1.782)	13.35^f (1.338)	5.10^ab (0.423)	4.56^a (0.183)	0.24^ab (0.010)	0.22^ab (0.012)	0.27^a (0.019)	0.25^ab (0.008)	7.11^d (0.167)	3.08^bc (0.021)

Note: Ha*, Haloxylon ammodendron. Ce*, Calligonum ebinuricum. Ph, Poacynum hendersonii. Ss, Seriphidium santolinum. As, Alhagi sparsifolia. Rs*, Reaumuria soongorica. Ns, Nitraria sibirica. Pa, Phragmites australis. Pe, Populus euphratica. Tr*, Tamarix ramosissima. Kc, Karelinia caspica. Kf*, Kalidium foliatum. Hh, Halimodendron halodendron. Av, Apocynum venetum. Sm*, Suaeda microphylla. Gu, Glycyrrhiza uralensis. Hc*, Halostachys caspica. Hs*, Halocnemum strobilaceum. The asterisk (*) means that plant photosynthetic organ is assimilating shoot. Sites 1–4 are the dry s sites, sites 5–9 are the humid-saline sites, S1–S4 are the humid-non-saline sites (reference sites).