Acta Agriculturae Boreali-Sinica ›› 2026, Vol. 41 ›› Issue (1): 111-121. doi: 10.7668/hbnxb.20195954

Special Issue: Rice Soil fertilizer Hot Article Cultivation & Physiology

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

Effects of Long-term Fertilization on Yield Formation and Physiological Regulation of Double Cropping Late Rice

HU Zhihua1,2, WU Jianfu2, HU Dandan1, SONG Huijie1, WU Yan1, LIU Kailou1, CHENG Kun1, LI Daming1, XU Xiaolin1   

  1. 1 Jiangxi Institute of Red Soil and Germplasm Resources,Nanchang 330046,China
    2 College of Land Resources and Environment,Jiangxi Agricultrual University,Nanchang 330045,China
  • Received:2025-05-26 Published:2026-03-10

Abstract:

To investigate the effects of long-term fertilization on yield formation and its physiological regulation mechanisms in double cropping late rice,it utilized a long-term fertilization experiment(initiated in 1981)in red paddy soils of Jinxian.Four typical treatments were selected:no fertilization(CK),single application of nitrogen-phosphorus-potassium(NPK),double dose of NPK(HNPK),and combined organic-inorganic fertilization(NPKM).Comparisons were made on double cropping late rice yield,dry matter accumulation,chlorophyll dynamics,and differential gene expression in leaves at fullheading and filling stages in the 42nd year of long-term fertilization.Results showed that long-term fertilization resulted in yields ranked as NPKM>HNPK>NPK>CK,with HNPK and NPKM treatments significantly surpassing NPK,showing increases of 29.63% and 57.18% respectively.Compared with NPK,both NPKM and HNPK significantly improved yield components:effective panicles,grains per panicle,and grain density increased by 16.98%—46.42%,8.68%—15.26%,3.69%—7.37%,respectively.Regarding dry matter accumulation,NPKM and HNPK significantly enhanced dry matter weight at all growth stages and promoted translocation of stem-leaf dry matter to panicles from filling to maturity.The contents of chlorophyll in NPKM and HNPK treatments were significantly higher than those in CK and NPK treatments at all stages,and NPKM delayed the decay of chlorophyll from filling stage to maturity stage.Correlation analysis revealed significant positive relationships between yield and dry matter accumulation from tillering to heading(△DM1)and filling to maturity(△DM3),while showed extremely negative correlation with chlorophyll reduction from grain filling to maturity(△S3).Transcriptome analysis demonstrated that long-term fertilization significantly affected gene expression in leaves during fullheading and filling stages,with differentially expressed genes primarily enriched in photosynthesis,carbon/nitrogen metabolism,signal transduction,and stress-related pathways.In conclusion,long-term fertilization regulates gene expression and combined organic-inorganic fertilization improved yield components,enhanced early-stage dry matter accumulation,promoted assimilate translocation from vegetative organs to panicles during grain filling,maintain higher chlorophyll levels,and delayed leaf senescence post-grain filling.This comprehensive mechanism achieves yield enhancement through strengthening source(enhancing photosynthetic capacity),expanding sink(increasing dry matter storage),and facilitating flow(promoting assimilate transport).

Key words: Double cropping late rice, Long-term fertilization, Yield, Dry matter accumulation, Chlorophyll, Differently expressed genes(DEGs)

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Cite this article

HU Zhihua, WU Jianfu, HU Dandan, SONG Huijie, WU Yan, LIU Kailou, CHENG Kun, LI Daming, XU Xiaolin. Effects of Long-term Fertilization on Yield Formation and Physiological Regulation of Double Cropping Late Rice[J]. Acta Agriculturae Boreali-Sinica, 2026, 41(1): 111-121. doi: 10.7668/hbnxb.20195954.

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