ACTA AGRICULTURAE BOREALI-SINICA ›› 2019, Vol. 34 ›› Issue (3): 173-179. doi: 10.7668/hbnxb.201750976

Special Issue: Soil fertilizer

• Resource and Environment·Plant Protection • Previous Articles     Next Articles

The Response of Potassium Forms to Long-term Located Fertilization in Black Soil

DU Yan1,2, WANG Tianye1,2, WU Yangsheng1,2, GAO Qiang1,2, GAO Yunhang3, LIU Shuxia1,2   

  1. 1. College of Resources and Environment, Jilin Agricultural University, Changchun 130118, China;
    2. Key Laboratory of Sustainable Utilization of Soil Resources in Commodity Grain Bases, Changchun 130118, China;
    3. College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China
  • Received:2018-12-23 Published:2019-06-28

Abstract: In order to understand clearly the effect of long-term fertilization on the potassium forms in black soil, the field trials were carried out through different long-term positioning experiments. The trial treatments included three categories:single application of chemical fertilizer, low-volume corn stalk with chemical fertilizer, and high-volume corn stalk with chemical fertilizer. The results showed that under long-term fertilization conditions, the treatments of low-volume corn stalks combined with chemical fertilizer (except NP+S2.5) and high-volume corn stalks combined with chemical fertilizer increased the total potassium content compared to CK (without fertilization), among which the effects of S5.0, N+S5.0 and NPK+S5.0 treatments were significant. The treatment of single fertilizer was inconsistent to CK treatment in the change of total potassium content.The total potassium content in N and NP treatments was lower than that of CK, but it increased significantly in K and NPK treatments. The content of slow-acting potassium increased significantly under the influence of high-content corn stalks combined with chemical fertilizers, and the highest came from the K+S5.0 treatment.The mineral potassium was relatively stable in soil, so it was less influenced by long-term fertilization in black soil. Under long-term fertilization conditions, the treatments of low-volume corn stalks combined with chemical fertilizer and high-volume corn stalks combined with chemical fertilizer significantly increased the content of available potassium compared to CK, and NPK+ S2.5, K+S5.0 and NPK+S5.0 treatments had the highest content of available potassium. K+S5.0 treatment had the most effect on the contents of water-soluble potassium and exchangeable potassium for long-term fertilization. The mineral potassium in black soil accounted for 90%-98% of total potassium(the highest), and the water-soluble potassium was the lowest. It was concluded that the application of chemical fertilizers with corn stalks in different fertilization treatments had the greatest influence on various forms of potassium in soil, followed by NPK fertilizer application, and the potassium forms in black soil were different due to different fertilization treatments.

Key words: Black soil, Potassium form, Localized fertilization

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Cite this article

DU Yan, WANG Tianye, WU Yangsheng, GAO Qiang, GAO Yunhang, LIU Shuxia. The Response of Potassium Forms to Long-term Located Fertilization in Black Soil[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(3): 173-179. doi: 10.7668/hbnxb.201750976.

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