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Table 1 Various characteristics of the four typical Chinese rice-growing regions

From: The chemodiversity of paddy soil dissolved organic matter correlates with microbial community at continental scales

 

Hani Terrace

Taihu Plain

Sanjiang Plain

Lianghu Plain

Administrative region

Yunnan Province.

Jiangsu, Zhejiang, Anhui Provinces, and Shanghai Municipality

Heilongjiang Province

Hunan and Hubei Provinces

Longitude range

100°55′27″–103°14′57″

118°38′12″–121°47′48″

130°12′45″–134°8′45″

111°50′51″–114°48′12″

Latitude range

22°46′44″–24°28′13″

30°3′19″–31°56′15″

45°16′53″–48°2′40″

28°34′7″–31°16′21″

Climate

3-D climate, (sub)tropics

subtropics

temperate

subtropics

Elevation (m)

350–3000

0–45

50–160

10–100

Rice cultivation history

~ 1200 years

~ 5000 years

~ 60 years

~ 4000 years

Rice cultivars (Oryza sativa L.) [89]

Most are japonica

Half are indica and half are japonica

All are japonica

Most are indica

Cultivation method

traditional

modern and small-scale

modern and large-scale

modern and medium-scale

Mean pH

6.07 ± 0.60

6.60 ± 0.70

6.32 ± 0.32

6.80 ± 0.68

Mean annual temperature (°C)

16.21 ± 1.77

15.66 ± 0.41

2.85 ± 0.78

16.68 ± 0.35

Mean annual precipitation (mm/d)

3.20 ± 0.19

3.74 ± 0.19

1.86 ± 0.13

3.45 ± 0.29

Dissolved organic carbon (mg/ml)

23.51 ± 6.84

31.68 ± 11.41

29.28 ± 8.39

31.61 ± 14.40