ACTA AGRICULTURAE BOREALI-SINICA ›› 2018, Vol. 33 ›› Issue (5): 181-187. doi: 10.7668/hbnxb.2018.05.025

Special Issue: Corn Soil fertilizer

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Effects of Long-term Fertilization on Potassium Q/I in Cropping Maize

WU Junnan1,2, LIU Yuxin1,2, WANG Tianye1,2, GAO Qiang1,2, WU Haiyan3, LIU Shuxia1,2   

  1. 1. College of Resources and Environment, Jilin Agricultural University, Changchun 130118, China;
    2. Key Laboratory of Soil Resource Sustainable Utilization for Jilin Province Commodity Grain Bases, Changchun 130118, China;
    3. Jilin Academy of Agricultural Sciences, Changchun 130124, China
  • Received:2018-07-12 Published:2018-10-28

Abstract: In order to understand the effect of long-term fertilization on the dynamic balance of potassium nutrients in black soil corn fields. We based on the long-term fertilization experiment (1984-2015) in black soil corn field,the effects of different fertilization treatments on the characteristics of Q/I curve and the parameters (potassium supply capacity,potassium supply potential and potassium buffer capacity) of black soil in maize field were studied. The results showed that long-term different fertilizer treatments of black soil potassium Q/I curve and typical Q/I curve was similar. Q/I curve among different fertilizer treatments presented a similar shape. It consisted of two parts:curve and straight line. Fertilization could increase in the black soil-ΔK0 value and AReK value,reduced the black earth PBCK value,treatment of NPK with high straw content (NPK+S0.5) black soil-ΔK0 value of up to 0.167 9 cmol/kg,AReK value was also the highest under NPK+S0.5 treatment 1.718 5×10-3(cmol/kg)-1/2.However,the PBCK value was the smallest,which was 97.7 (mg/kg)/(cmol/kg)1/2. Applying potassium fertilizer and straw was more effective in increasing the-ΔK0 and AReK values and decreasing the PBCK value in the corn field soil. The correlation analysis showed that there was a significantly positive correlation between black soil-ΔK0 and AReK values and soil organic matter,total nitrogen,total phosphorus,total potassium,and available potassium content (P <0.01),and PBCK values were exactly the opposite. In general,chemical fertilizers combined with straw had a great influence on the physicochemical properties of the soil and the-ΔK0 value,AReK value and PBCK value. It could not only increase soil nutrients,but also increase soil potassium supply capacity. Therefore,reasonable fertilization will help increase the supply capacity of soil potassium nutrition and increase crop yield and quality.

Key words: Long-term fertilization, Corn field soil, Q/I characteristics, Potassium supply capacity

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Cite this article

WU Junnan, LIU Yuxin, WANG Tianye, GAO Qiang, WU Haiyan, LIU Shuxia. Effects of Long-term Fertilization on Potassium Q/I in Cropping Maize[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2018, 33(5): 181-187. doi: 10.7668/hbnxb.2018.05.025.

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