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Chinese Agricultural Science Bulletin ›› 2019, Vol. 35 ›› Issue (23): 66-71.doi: 10.11924/j.issn.1000-6850.casb18030117

Special Issue: 园艺

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Apple Orchards in Zhaotong Located in Southwest Cold Highland: Current Status of Soil Nutrients

  

  • Received:2018-03-23 Revised:2019-07-23 Accepted:2018-11-16 Online:2019-08-13 Published:2019-08-13

Abstract: To clarify the current status of soil nutrients in apple orchards of Zhaotong and provide a basis for soil management, we chose 100 orchard soil samples at 5 main apple production areas in Zhaotong and analyzed their nutrients. The results showed that: (1) the average content of organic matter, hydrolysable nitrogen (N), rapid available phosphorus (P), available potassium (K), calcium (Ca), magnesium (Mg), available- Fe, Zn, Mn, B, S, and Se in 0-40 cm soil layer was 2.42%, 117.50 mg/kg, 24.87 mg/kg, 167.06 mg/kg, 2947.00 mg/kg, 401.71 mg/kg, 131.55 mg/kg, 5.75 mg/kg, 230.56 mg/kg, 0.62 mg/kg, 73.74 mg/kg and 0.19 mg/kg, respectively; (2) the content of nutrient elements in 0-40 cm soil layer obviously higher than that of 40-60 cm, and their difference was significant; (3) in 0-40 cm soil layer, the organic matter content was: Leju>Jiupu> Sujiayuan>Yongfeng>Sayu; the hydrolytic nitrogen content was: Leju>Sujiayuan>Jiupu>Sayu>Yongfeng; the available phosphorus content was: Yongfeng> Jiupu> Sujiayuan > Sayu>Leju; the available potassium content was: Yongfeng>Jiupu>Sayu>Leju>Sujiayuan. The content of organic matter and available phosphorus i moderate in orchard soil of Zhaotong, the hydrolytic nitrogen and available potassium are abundant; the soil fertility is strong, however, the content of medium and trace elements are all excessive and prone to antagonistic effects. So we suggest that organic fertilizer should be applied increasingly, N, P, K application should be balanced, and medium and trace elements should be used cautiously, so as to reduce chemical fertilizer, stabilize production and improve apple quality in Zhaotong.