Nutrient Characteristics in Paddy Soils of Hani Terrace in Luchun County of Yunnan Province
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    Abstract:

    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.

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张德刚,刘艳红,罗文珍,全舒舟.云南绿春哈尼梯田湿地水稻土基本养分特征[J].水土保持通报英文版,2010,(5):91-95

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History
  • Received:February 07,2010
  • Revised:April 02,2010
  • Adopted:
  • Online: November 26,2014
  • Published: