Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2020, Vol. 36 ›› Issue (14): 80-87.doi: 10.11924/j.issn.1000-6850.casb19010034

Special Issue: 玉米

Previous Articles     Next Articles

Corn Fertilizer Recommendation System Based on Abundance-deficiency Index of Soil N in Four Great Natural Regions and Whole China

Sun Hongren1, Zhang Jiping2, Gang Lihua3, Lv Yucai4, Wang Yinghai5   

  1. 1 College of Grassland Science and Technology, China Agricultural University, Beijing 100193
    2 Beijing Liukai Agriculture Sci. &Tech Co., Ltd, Beijing 100095
    3 Beijing Potato Net Agriculture Science Academy, Beijing 100043
    4 Beijing Cofine Sci. &Tech Co., Ltd, Beijing 100095
    5 Beijing Insentek Technology Co., Ltd, Beijing 100086
  • Received:2019-01-07 Revised:2019-04-24 Online:2020-05-15 Published:2020-05-20

Abstract:

To provide a scientific basis for corn N fertilization, the abundance-deficiency index (ADI) of soil N and the appropriate N fertilizer application rates (ANFAR) for corn in the northeast plain, the Huang-huai-hai plain, the loess plateau, the southwest hilly area and the whole China were studied. The methods of scattered theoretical data integration, regression equation between soil N content and relative yield of no N fertilizer treatment, and the new applied formula based on “nutrient balance and projected yield minus soil fertility yield” for determining the appropriate fertilizer application rates were employed. The results showed that the ADI of soil alkaline hydrolysis nitrogen (SAHN) for corn in the northeast plain for the first to the seventh level (FTSL) was ≥417, 263-417, 166-263, 105-166, 67-105, 42-67 and <42 mg/kg, respectively. The ADI of SAHN for corn in the Huang-huai-hai plain was ≥177, 124-177, 87-124, 61-87, 42-61, 30-42 and <30 mg/kg, respectively. The ADI of SAHN of corn in the loess plateau were ≥191, 131-191, 90-131, 62-90, 43-62, 30-43 and <30 mg/kg, respectively. ADI of SAHN for corn in the southwest hilly area was ≥349, 221-349, 140-221, 88-140, 56-88, 36-56 and <36 mg/kg, respectively. The ADI of soil total nitrogen for corn in the whole China for the FTSL were ≥3.5, 2.1-3.5, 1.2-2.1, 0.70-1.2, 0.42-0.70, 0.25-0.42 and <0.25 g/kg. The ADI of soil organic matter for corn in the whole China for the second to the seventh level were ≥58, 30-58, 15-30, 7.4-15, 3.8-7.4 and <3.8 g/kg, respectively. When the nitrogen fertilizer use efficiency in current season was 40%, the range of the ANFAR for grain corn (target yield of 6-15 t/hm 2) for the FTSL was 0-0, 35-86, 69-173, 104-259, 138-345, 173-431 and 207-518 kg/hm 2, respectively. The range of the ANFAR for silage corn (target yield of 30-120 t/hm 2) for the FTSL was 0-0, 30-120, 60-240, 90-360, 120-480, 150-600 and 180-720, respectively.

Key words: China, corn, silage corn, soil testing and fertilizer recommendation, alkaline hydrolysis nitrogen, total nitrogen, organic matter, abundance-deficiency index, fertilizer application rate

CLC Number: