The characteristics of soil pH

organic matter

available nitrogen

available phosphorus

and available potassium in Hani Terrace paddy soils in Luchun County

Yunnan Province were studied.Soil samples were collected in the three sections of Guidong River patch

Songdong River patch

and Erhaohe River patch.Three kinds of Hani Terrace paddy soils

i.e.

non-erosion

erosion with one year remediation

and erosion with eight year remediation

were analyzed.Results show that(1)in the paddy soils

soil pH value is between 5.21 and 6.79;soil organic matter content

between 3.8 and 47.14 g/kg;soil available N content

between 39.51 and 137.47 mg/kg;soil available P content

between 1.29 and 13.31 mg/kg;and soil available potassium content

between 33.32 and 178.90 mg/kg.Spatially

soil nutrients at the same place of the paddy soils keep stable and have no significant variation

but at different places

they have some differences.(2)In the paddy soils

basic nutrients in non-erosion area are much higher than erosion area.Nutrients in the paddy soils have been increased by rehabilitation and field management and soils in terraces have been resumed for 8 years after soil erosion occurs.Most of nutrient contents are significantly higher than those only resumed for one year.(3)Basic soil nutrients at the same foothill but different altitudes in Hani Terrace of Luchun County are different

but vertically

nutrients have no obvious regular changes with increasing or decreasing of altitude.