Acta Agriculturae Boreali-Sinica ›› 2024, Vol. 39 ›› Issue (6): 163-175. doi: 10.7668/hbnxb.20195110

Special Issue: Corn Soil fertilizer

• Resources & Environment·Plant Protection • Previous Articles     Next Articles

Response Pattern of Spring Maize Yield,Photosynthetic Characteristics and Fluorescence Parameters to Phosphorus Dosage in Ningxia Irrigation Area

HONG Ziqiang1, ZHANG Zhengzhen2, WANG Jia3, ZHOU Tian1, LI Fanguo1, SU Ming1, WU Hongliang1, KANG Jianhong1   

  1. 1 School of Agriculture,Ningxia University,Yinchuan 750021,China
    2 Ningxia Seed Workstation, Yinchuan 750001,China
    3 Agricultural Technology Station of Hongguozi Town,Pingluo 753400,China
  • Received:2024-05-16 Published:2024-12-28

Abstract:

To study the photosynthetic characteristics,fluorescence parameters and yield response to phosphorus in maize,and to clarify the optimal phosphorus application rate for maize under drip irrigation and water fertilization technology.Providing solid theoretical basis and technical support for high-yield and high-efficiency cultivation of maize in Ningxia region.The experiment was carried out at Pingjipu Farm,Yinchuan,Ningxia,from 2019 to 2020,with six phosphorus treatments in the order of 0(P0),60(P1),120(P2),180(P3),240(P4),and 300 kg/ha(P5).Analysis of the changing patterns of photosynthetic and fluorescence parameters of spring maize leaves and their correlation with yield under different phosphorus fertilizer treatments.In two years,during the big bell mouth stage,leaf area index (LAI) was increased by 4.21% to 12.78% and 4.68% to 15.60% for P3 compared to other treatments,respectively.Phosphorus fertilizer at 180 kg/ha was most effective in promoting leaf area index and photosynthetic potential(LAD) of maize.LAD was significantly increased by 14.42% under P3 treatment compared to no phosphorus fertilizer treatment during the full two year period.The photosynthetic characteristics of maize responded differently to the intensity of phosphorus application,and as the intensity of phosphorus application increased,the net photosynthetic rate (Pn) all reached the maximum value after the stamen pumping stage,and at the R1 stage of the 2 years,the Pn was significantly increased by 10.68% under the P3 treatment as compared to the no-phosphorus-fertilizer treatment.The coefficient of determination (R2) was 0.926 5,0.889 9,and 0.832 0,respectively.Phosphorus application increased the maize photosystem Ⅱ composite performance index (PI),which had its maximum peak at the R1 stage in 2 years,and PI increased by 1.12% to 8.50% and 8.47% to 15.40% under the P3 treatment compared with the other treatments,respectively.The maximum yield was obtained at 180 kg/ha of phosphorus application,which was 17.27% higher as compared to no phosphorus treatment.Based on the analysis of the yield fitting equation,it was shown that the maximum corn yield of 13 823.84 kg/ha was reached at 179.34 kg/ha of phosphorus applied.Pearson's correlation analysis showed that appropriate leaf area index significantly affected maize yield in the late stage,and the photosynthetic parameters all had highly significant effects on maize yield completion;principal component analysis showed that the P3 treatment had the highest composite score for the optimization effect on maize yield.Reasonable transportation of phosphorus fertilizer can effectively ensure higher SPAD value,PSⅡ reaction center activity,improve the capture and utilization of light energy in spring maize,and promote photosynthesis,so as to improve the yield and economic benefits of maize.

Key words: Maize, Phosphorus application, Photosynthetic characteristic, Fluorescence parameter, Yield

Cite this article

HONG Ziqiang, ZHANG Zhengzhen, WANG Jia, ZHOU Tian, LI Fanguo, SU Ming, WU Hongliang, KANG Jianhong. Response Pattern of Spring Maize Yield,Photosynthetic Characteristics and Fluorescence Parameters to Phosphorus Dosage in Ningxia Irrigation Area[J]. Acta Agriculturae Boreali-Sinica, 2024, 39(6): 163-175. doi: 10.7668/hbnxb.20195110.

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