Journal of Northern Agriculture ›› 2023, Vol. 51 ›› Issue (6): 10-17.doi: 10.12190/j.issn.2096-1197.2023.06.02

• Soil and fertilizer·Physiology and biochemistry • Previous Articles     Next Articles

Effects of nitrogen fertilizer reduction and substitution on potato field soil physicochemical properties,potato yield and potato quality

DU Erxiao1,2,3, LI Huanchun4, REN Yongfeng1,2,3, KANG Wenqin1, ZHENG Na1, BAI Hongmei1, ZHAO Yiwen1, ZHAO Peiyi1,2,3   

  1. 1. Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences,Hohhot 010031,China;
    2. Inner Mongolia Key Laboratory of Dryland Farming,Hohhot 010031,China;
    3. Inner Mongolia Science Observing and Experimental Station of Arable Land Conservation,Ministry of Agriculture and Rural Affairs,Wuchuan 011705,China;
    4. Liaoning Agricultural Vocational and Technical College,Yingkou 115007,China
  • Received:2023-10-16 Online:2023-12-20 Published:2024-02-19

Abstract: 【Objective】To assess the effects of nitrogen fertilizer reduction and substitution on potato field soil physicochemical properties,potato yield and potato quality in the north foot of Yinshan Mountains in Inner Mongolia.【Methods】The experiment was carried out in Wuchuan dryland experiment station of Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences. Seven treatments were set up,including conventional fertilization(NPK,CK),no nitrogen fertilization(PK),reduced nitrogen fertilization(RN),reduced nitrogen fertilization+water-soluble fertilizer(RN+WF),reduced nitrogen fertilization+decomposed sheep manure organic fertilizer(RN+SM),reduced nitrogen fertilization+bio-organic fertilizer(RN+BM),and reduced nitrogen fertilization+controlled release urea(RN+RUN). The impacts of reduced nitrogen fertilization and partial substitution of nitrogen fertilizer with different fertilizers on soil bulk density,total porosity,available nutrients,organic matter as well as potato yield and quality were evaluated.【Results】The soil bulk density and total porosity of RN+BM treatment were significantly (P<0.05) higher than other treatments. In comparison with NPK treatment,RN+RUN treatment significantly (P<0.05) elevated the available nitrogen,available phosphorus,and available potassium content in the 10-20 cm soil layer by 1.62%,2.38% and 1.54%,respectively. RN+BM treatment had the highest increase of organic matter content in the 0-10 cm soil layer,with an increase of 2.45% compared with NPK treatment. RN+BM treatment significantly (P<0.05) improved the potato yield and quality. In comparison with NPK treatment,the potato yield improved by 16.95%,VC,starch,crude protein and reducing sugar content increased by 15.92%,2.96%,16.26% and 6.67% respectively,and nitrate content decreased by 7.89%.【Conclusion】Reduced nitrogen fertilization+bio-organic fertilizer effectively improved potato field soil physicochemical properties,improved potato yield and quality,was the suitable fertilization pattern for potato cultivation in the north foot of Yinshan Mountains in Inner Mongolia.

Key words: Potato, Nitrogen fertilizer reduction, Soil physicochemical properties, Yield, Quality

CLC Number: 

  • S532.062