Li Kaiwei, Zhang Jiquan, Wei Sicheng, et al. Refined climatic zoning of spring soybean in Northeast China. J Appl Meteor Sci, 2021, 32(4): 408-420. DOI:  10.11898/1001-7313.20210403.
Citation: Li Kaiwei, Zhang Jiquan, Wei Sicheng, et al. Refined climatic zoning of spring soybean in Northeast China. J Appl Meteor Sci, 2021, 32(4): 408-420. DOI:  10.11898/1001-7313.20210403.

Refined Climatic Zoning of Spring Soybean in Northeast China

DOI: 10.11898/1001-7313.20210403
  • Received Date: 2021-04-01
  • Rev Recd Date: 2021-06-11
  • Publish Date: 2021-07-31
  • The spring soybean in Northeast China is studied, and its climatic zoning index is determined by multi-year relative meteorological yield and meteorological data considering three maturity types of soybeans: Early, medium and late. Considering the influence of temperature, light and water on soybean growth, two suitability evaluation methods, zoning indicator affiliation function and crop response function, are selected to evaluate the climatic suitability of soybean in Northeast China using meteorological data from 1990-2019 after refined interpolation (Anusplin interpolation). The evaluation results are verified using yield indicators. Climatic zoning class thresholds are determined based on the quantitative relationship between yield reduction rate and suitability of soybeans, and refined climatic zoning is conducted for two time periods, 1990-2004 and 2005-2019. The results show that the average temperature in August, cumulative rainfall from May to September and cumulative sunshine hours in July are the main meteorological factors affecting the relative meteorological yield of soybeans. The climatic zoning indexes for soybean in early, medium and late maturity zones are different. Compared with the results of climate suitability evaluation without maturity type, the evaluation results based on different maturity type indicators are more detailed in spatial distribution and better in expressing the distribution of soybean yields and yield stability. When yield data are lacking, the climate zoning results based on crop response functions is a good complement, which can indicate the distribution of soybean yields, but has shortcomings in the description of yield stability. According to the quantitative relationship between climate suitability and yield reduction rate, the evaluation results are classified as four levels: Most suitable (0.76 ≤ S ≤ 1), suitable (0.65 ≤ S < 0.76), sub-suitable (0.49 ≤ S < 0.65) and unsuitable (0 ≤ S < 0.49). The most suitable areas for soybean cultivation in Northeast China are concentrated in the northern part of the Songnen Plain and the south-central part of the Sanjiang Plain. As the climate warms, areas suitable for soybean cultivation expand to higher latitudes and higher altitudes. Refined climatic zoning of soybean in Northeast China is carried out at three levels: Temporal, spatial (1 km by 1 km farmland), and maturity type. The results of the refined climatic zoning can provide scientific basis for the full and rational use of climate resources and optimization of soybean planting structure in Northeast China.
  • Fig. 1  The target area with meteorological stations and spring soybean maturity types

    Fig. 2  Quadratic curve fitting of key meteorological elements and relative meteorological yield of spring soybean in Northeast China

    Fig. 3  Climate suitability of spring soybean based on the affiliation function of zoning index in Northeast China (with no distinction of maturity type)

    Fig. 4  Climate suitability of based on the affiliation function of the zoning index in Northeast China

    Fig. 5  Synthetic spatial distribution of early, medium and late maturity climate suitability maxima for spring soybean based on crop response functions

    Fig. 6  Correlation between climate suitability and yield index of spring soybean in Northeast China

    Fig. 7  Relationship between climate suitability based on the affiliation function and relative meteorological yield

    Fig. 8  Refined climatic zoning for spring soybean in Northeast China

    Table  1  Triple base point temperature of spring soybean at each reproductive stage

    生育阶段 下限温度/℃ 最适温度/℃ 上限温度/℃
    播种-出苗 7 16 26
    出苗-三真叶 10 19 30
    三真叶-开花 13 22 32
    开花-结荚 16 26 32
    结荚-鼓粒 14 23 30
    鼓粒-成熟 10 18 26
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    Table  2  Correlation coefficients between meteorological elements and relative meteorological yield during the growing season of spring soybean in Northeast China

    时段 温度 降水 日照
    5月 -0.28 0.26 0.24
    6月 -0.27 0.32 -0.28
    7月 0.01 0.37 -0.39
    8月 -0.33 0.33 -0.31
    9月 0.30 0.15 -0.23
    生长季 0.28 0.40 -0.34
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    Table  3  Climatic zoning indicators for early, medium, late maturing spring soybean regions and the whole area (with no distinction of maturity type) in Northeast China

    气象要素 阈值 早熟 中熟 晚熟 东北地区(不分熟型)
    适宜下限 17.0 17.6 17.8 17.4
    8月平均温度/℃ 最适宜 19.1 20.4 21.3 21.0
    适宜上限 21.2 23.2 24.8 24.6
    适宜下限 244.3 316.8 372.4 354.4
    5—9月累积降水量/mm 最适宜 490.7 550.6 629.9 600.2
    适宜上限 737.0 784.2 887.2 845.8
    适宜下限 169.5 152.8 86.1 119.4
    7月累积日照时数/h 最适宜 233.2 210.4 160.3 188.7
    适宜上限 296.9 268.1 234.6 257.9
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    • Received : 2021-04-01
    • Accepted : 2021-06-11
    • Published : 2021-07-31

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