Table 2 Properties of the two paddy soils used in the study.

From: Microprofiling of nitrogen patches in paddy soil: Analysis of spatiotemporal nutrient heterogeneity at the microscale

Property

YT

QJ

pH (water:soil, 2.5:1)

5.02

8.05

Organic matter (g kg−1)

39.1

27.3

Total N (g kg−1)

1.74

1.49

C/N ratio

13.0

10.6

NH4+-N (mg kg−1)

2.27

1.46

NO3−-N (mg kg−1)

0.21

0.48

Clay (%)

20.9

12.7

Locality

Yingtan, Jiangxi prov.

Qianjiang, Hubei prov.

Reclamation year

>50

>50

Parent material

Quaternary red clay

River alluvium

Average yield of double cropping rice per year (kg ha−1)

10,000

12,500

  1. Fertilisation strategy was in concentrated applications on both soils (see Methods).
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