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Chinese Agricultural Science Bulletin ›› 2018, Vol. 34 ›› Issue (18): 119-125.doi: 10.11924/j.issn.1000-6850.casb17050066

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Soil Fertility Classification and Evaluation in Yulong Naxi Autonomous County

  

  • Received:2017-05-15 Revised:2018-05-25 Accepted:2017-07-06 Online:2018-06-26 Published:2018-06-26

Abstract: To guide agricultural production in Yulong of Yunnan, the authors analyzed 216 soil samples from Yulong Naxi Autonomous County to study soil pH value and main fertility indexes. The results showed that the average soil pH value was 7.08, and the average content of soil total nitrogen, alkali-hydrolyzable nitrogen, available P, available K, slowly available K and soil organic matter was 1.83 g/kg, 134.67 mg/kg, 16.75 mg/kg, 139.10 mg/kg, 896.56 mg/kg and 17.12 g/kg, respectively. Soil pH value was mostly alkaline or neutral. Available P, total nitrogen and alkali- hydrolyzable nitrogen were in general medium level, while organic matter, available K, and slowly available K were in high level. The variation degree followed an order of available P> total nitrogen> slowly available K> available K> organic matter> alkali- hydrolyzable nitrogen. Therefore, the authors advised to control soil pH value, stabilize soil nitrogen and phosphorus, appropriately enrich organic fertilizer and potash fertilizer.

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