JOURNAL OF NATURAL RESOURCES ›› 2000, Vol. 15 ›› Issue (2): 138-142.doi: 10.11849/zrzyxb.2000.02.009

• Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS • Previous Articles     Next Articles

Study on change of soil potassium resources in Henan Province

LI Guibao1, YIN Chengqing1, SUN Kegang2, JIAO You2, BAI Legao2   

  1. 1. State Key Lab.of Environmental Aquatic Chemistry,Research Center for Eco Environmental Sciences,CAS,Beijing 100085,China;
    2. Soil and Fertilizer Institute,Henan Academy of Agricultural Sciences,Zhengzhou 450002,China
  • Received:1999-07-06 Revised:1999-10-10 Online:2000-06-25 Published:2000-06-25

Abstract: Soil total potassium,readily available potassium and slow release potassium were determined by analyzing 1130 soil samples taken recently and were compared with the determinations of the National Second Soil Survey during 1985.Results showed that soil available potassium content was 102 6mg/kg,an annual average decrease by 3 04mg/kg;the average content of slow release potassium was 863mg/kg,ranging from 177 5mg/kg to 2553mg/kg; the average content of total potassium was 17 2g/kg,decrease by 10 4%,ranging from 16 9% for Shajiang black soil to 0 5% for cinnamon soil.

Key words: Henan province, soil potassium, resources