. 2015 Apr 15;10(4):e0122981. doi: 10.1371/journal.pone.0122981

Table 2. Main ecological factors of eight locations throughout China.

Itemss	S₁	S₂	S₃	S₄	S₅	S₆	S₇	S₈
X_RAN	6.31±0.03 abcd	28.12±0.02 cde	32.65±0.04 abc	8.09±0.07 ab	7.43±0.04 abc	8.13±0.03 abcd	32.21±0.02 cde	35.82±0.03 abc
X_RAP	6.42±0.06 ab	7.58±0.05 a	8.56±0.02 b	11.37±0.15 de	8.25±0.24 ab	7.24±0.06 ab	8.85±0.05 a	10.13±0.02 b
X_RAPM	107.69±0.02 cde	357.53±0.04 e	96.71±2.14 de	132.04±4.30 e	160.41±0.01 de	135.96±0.02 cde	384.35±0.03 e	112.71±0.04 de
X_TN	0.23±0.02 e	0.25±0.001 bc	0.20±0.004 e	0.29±0.005 de	0.32±0.004 e	0.17±0.001 e	0.33±0.001 bc	0.16±0.005 e
X_TP	0.03±0.001 ab	0.11±0.002 cde	0.14±0.003 e	0.21±0.005 bc	0.05±0.001 de	0.02±0.001 ab	0.15±0.002 cde	0.32±0.003 e
X_TPM	2.45±0.01 e	1.49±0.02 de	1.62±0.04 de	1.77±0.03 abc	2.46±0.05 e	2.60±0.01 e	1.56±0.02 de	2.35±0.04 de
X_OM	5.00±0.01 bcde	6.52±0.01 bcd	5.40±0.01 b	10.02±0.06 de	6.38±0.03 cde	4.09±0.01 bcde	7.22±0.03 bcd	6.50±0.01 b
X_pH	6.20±0.05 abc	7.31±003 bcd	6.59±0.05 cde	6.39±0.07 cde	6.12±0.06 abcd	6.40±0.05 abc	7.09±003 bcd	6.20±0.05 cde
X_JAT	-7.0±0.01 bcd	-4.0±0.04 abcd	-8.2±0.02 de	-7.6±0.05 bcd	-2.2±0.04 bcd	-5.6±0.01 bcd	1.5±0.03 abcd	-5.0±0.02 de
X_JMT	19.0±0.01 abc	22.5±0.07 ab	23.4±0.03 bcd	21.7±0.04 d	15.5±0.01 ab	13.4±0.02 abc	16.3±0.03 ab	16.8±0.05 bc
X_AAT	1847.43±0.03 bc	2390.80±0.05 ab	3643.87±0.06 c	4108.22±0.04bcd	1265.20±0.04bcde	1526.70±0.03 bc	2263.20±0.05 ab	1931.52±0.03 bcd
X_AHT	40.44±0.08 cd	32.80±0.04 bc	39.50±0.01 abc	35.00±0.03 ab	31.70±0.01 cd	24.60±0.04 cd	30.60±0.05 bc	33.90±0.02 abc
X_ALT	-24.00±0.04 de	-25.50±0.06 d	-26.62±0.03 bcd	-24.24±0.01 bc	-28.91±0.04 abc	-23.40±0.04 de	-14.4±0.02 d	-20.30±0.03bcd
X_AMT	6.90±0.05 ab	7.60±0.08 d	4.32±0.04 e	6.40±0.02 e	7.00±0.05 cde	5.50±0.05 ab	9.00±0.08 d	6.80±0.04 e
X_AAP	616.32±0.01 abc	635.44±0.04 bc	620.30±0.04abc	310.27±0.06 cde	880.30±0.04 ab	627.20±0.01 abc	650.45±0.04 bc	642.41±0.06abc
X_ASD	2370.12±0.04 ab	2021.35±0.07bcde	1226.55±0.03bc	2659.62±0.06abc	1738.34±0.03 a	2206.40±0.04 ab	2020.53±0.07bcde	2246.20±0.01bc
X_FFP	132.61±15.38abc	158.00±9.66 a	230.54±11.55ab	121.52±8.12 abc	180.00±1.23 a	167.00±15.38abc	180.00±9.66 a	147.35±11.55ab
X_RH	63±0.02 ab	70±0.04 a	74±0.05 c	55±0.02 bc	68±0.01 ac	45±0.02 a	55±0.03 ab	65±0.04 b

Note: For soil factors and climate factors, values were given as mean ± SD. For each location, values followed by the same small letter did not share significant differences according to Duncan’s test (P < 0.05). X_RAN(mg/kg)-Rapidly available nitrogen, X_RAP(mg/kg)-Rapidly available phosphorus, X_RAPM(mg/kg)-Rapidly available potassium, X_TN(%)-Total nitrogen, X_TP(%)-Total phosphorus,X_TPM(%)-Total potassium, X_OM(%)-Organic matter, X_pH-pH, X_JAT(°C)-January average temperature, X_JMT(°C)-July mean temperature, X_AAT(°C)-Anaual accumulated temperature(≥10°C), X_AHT(°C)-Annual highest temperature, X_ALT(°C)-Annual lowest temperature, X_AMT(°C)-Anaual mean temperature, X_AAP(mm)-Anaual average precipitation, X_ASD(h)-Anaual sunshine duration, X_FFP(d)-Frost free period, X_RH(%)-Relative humidity.