Journal of Northern Agriculture ›› 2022, Vol. 50 ›› Issue (6): 31-39.doi: 10.12190/j.issn.2096-1197.2022.06.05

• Soil and fertilizer·Prataculture • Previous Articles     Next Articles

The abundance-deficiency index of soil K and recommended potassium fertilizer application rates for grain and forage millet in China

ZHU Kaidi1,2, SUN Hongren1, ZHANG Jiping3, GANG Lihua4, LYU Yucai5, WANG Guojun6, WEI Dengfeng6   

  1. 1. College of Grassland Science and Technology,China Agricultural University,Beijing 100193,China
    2. School of Foreign Languages,Beijing Institute of Technology,Beijing 102401,China
    3. Beijing Liukai Agricultural Sciences and Technology Co. Ltd.,Beijing 100095,China
    4. Beijing Potato Net Agriculture Science Academy,Beijing 100043,China
    5. Shenzhen Liuyuan Enterprise Development Co. Ltd.,Shenzhen 518038,China
    6. Aohan Banner Huilong Cereal Plantation Farmer Cooperative,Aohan 024300,China
  • Received:2022-10-12 Online:2022-12-20 Published:2023-03-24
  • Contact: SUN Hongren

Abstract:

【Objective】To clarify the abundance-deficiency index of soil K and provide scientific basis for soil testing and potassium fertilizer recommendation of millet. 【Methods】The methods of scattered experimental data integration and the new applied formula based on“nutrient balance and projected yield minus soil fertility yield” were employed to study the abundance-deficiency index(ADI) of soil K and the recommended potassium fertilizer application rate(RPFAR) for millet.【Results】The ADI of millet soil available K for level 1-4 were ≥257,140-257,76-140 and <76 mg/kg,respectively. The ADI of soil total K for level 1-7 were ≥24,15-24,9-15,5-9,3-5,2-3 and<2 g/kg. When the potassium fertilizer use efficiency in current season(PFUEICS) was 50% and the target yield of grain was 3.00-7.50 t/hm2,the RPFAR for level 1-7 were 0,22-54,43-108,65-162,86-216,108-270 and 130-324 kg/hm2,respectively. When the target yield of hay was 6.0-15.0 t/hm2,the RPFAR for level 1-7 were 0,22-54,43-108,65-162,86-216,108-270 and 130-324 kg/hm2,respectively. When the target yield of silage was 15-45 t/hm2,the RPFAR for level 1-7 were 0,18-54,36-108,54-162,72-216,90-270 and 108-324 kg/hm2,respectively.【Conclusion】Initially established abundance-deficiency index of soil K recommended fertilization systems,which laid a scientific foundation for soil testing and potassium application of millet in China.

Key words: Millet, Soil testing and fertilization, Soil available potassium, Soil total potassium, Abundance-deficiency index, Potassium application rate

CLC Number: 

  • S153