Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (2): 108-115.doi: 10.11924/j.issn.1000-6850.casb20200300217

Special Issue: 玉米 烟草种植与生产

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The Yield Structure Model of Spring Corn Based on Environmental Factors

Xu Yixin1(), Feng Lei1, Su Yongxiu2(), Mo Shenping3, Liu Jun4   

  1. 1Guangxi Logistics Vocational and Technical College, Guigang Guangxi 537100
    2Guangxi Meteorological Disaster Mitigation Institute, Nanning Guangxi 530022
    3Guigang Meteorologic Bureau, Guigang Guangxi 537100
    4Guigang Agricultural Technology Extension Center, Guigang Guangxi 537100
  • Received:2020-03-18 Revised:2020-06-28 Online:2021-01-15 Published:2021-01-14
  • Contact: Su Yongxiu E-mail:261786751@qq.com;suyx03@126.com

Abstract:

The impact of environmental factors on crop yield is one of the important contents of modern agrometeorological research. Establishing a spring corn yield structure model can provide a basis for the scientific production of spring corn. The correlation between environmental factors and yield structure in different growth stages of spring corn in Guigang was analyzed. And multiple linear regression models and BP neural network models with full factors and significant factors were established. The results showed that the growth period that has the greatest impact on the yield structure of spring corn is from jointing to tasseling. The soil water volume and moisture content of 10 cm to 40 cm were the most closely related to the yield structure. The four models of yield structure prediction (R2) comparison showed that the factor model (AF) was superior to the significant factor model (SF).The multiple linear regression (MLR) model was superior to the BP neural network (BPNN) model. The test reported model found that the generalization ability of the MLR model was not as good as that of the BPNN model. Among them, the BPNN_AF model was the most accurate predictor of theoretical yield and ear diameter. The BPNN full factor model (BPNN_AF) can be used as the optimal model for predicting the yield structure of spring corn, it can better capture the non-linear influence law between the crop yield structure and environmental factors, and the prediction results are more reasonable and accurate.

Key words: meteorology, soil, yield structure, correlation analysis, model

CLC Number: