Journal of Northern Agriculture ›› 2023, Vol. 51 ›› Issue (4): 38-47.doi: 10.12190/j.issn.2096-1197.2023.04.05

• Soil and fertilizer · Water-saving irrigation • Previous Articles     Next Articles

Effects of continuous application of soil conditioner on the growth,development and yield components of maize in acidic soil in the southeastern region of Liaoning

ZHANG Lili1, XUE Bingdong1, FAN Ye1, MO Jiaojiao1, ZHAO Xinyu1, YANG Hailong1, FU Jun1, JIANG Ying2, QI Hua2, WANG Pu3   

  1. 1. Dandong Academy of Agricultural Sciences,Fengcheng 118109,China
    2. College of Agronomy,Shenyang Agricultural University,Shenyang 110866,China
    3. College of Agronomy and Biotechnology,China Agricultural University,Beijing 100193,China
  • Received:2023-05-22 Online:2023-08-20 Published:2023-11-07

Abstract:

【Objective】To explore the effects of continuous application of soil conditioner quicklime and organic fertilizer on the growth,development,and yield components of maize in acidic soil in the southeastern region of Liaoning.【Methods】From 2019 to 2021 field experiments were conducted in Fengcheng City,Liaoning Province. Four treatments were set up including no application of soil conditioner(CK),quicklime(CaO),organic fertilizer(Organic),and organic fertilizer+quicklime(Organic+CaO). The effects of continuous application of soil conditioner on maize plant traits,dry matter accumulation,yield components,and other indicators were analyzed.【Results】From 2019 to 2021,the maize yield of CaO treatment were all higher than CK. The yield of Organic and Organic+CaO treatments were higher than CK in the first two years and were lower than the CK in the third year of continuous application. The yield increase of CaO treatment were in the range of 2.12% to 19.74%. The yield increase rates of Organic+CaO treatment were 15.74% and 7.89% in the first two years,respectively. But there was no yield increase effect in the third year of application. The year,soil conditioner,and their interaction had extremely significant effect(P<0.01) on maize yield. The yield of CaO and Organic+CaO treatments were significantly higher(P<0.05) than CK and the Organic treatments. The ear number of CaO treatment was significantly higher(P<0.05) than CK. CaO and Organic+CaO treatments had significantly higher(P<0.05) kernel number per ear and kernel number per hectare than that of CK and Organic treatment. 1 000-kernel weight in Organic+CaO treatment was significantly higher(P<0.05) than all other treatments. Yield was significantly positively correlated(P<0.05) with kernel number per ear (R2=0.614) and kernel number per hectare (R2=0.746). Continuous application of soil conditioner could improve plant height,ear height,and the ratio of ear height to plant height of maize. And the effect on ear height was more than the effect on plant height. Leaf area index (LAI) increased rapidly in early growth stages and decreased slowly in later growth stages. The effects were more obvious for Organic+CaO and Organic treatments. Applying soil conditioner promoted the dry matter accumulation and post floral dry matter accumulation of all the growth stages. The effect of Organic+CaO treatment was better than that of Organic and CaO treatments.【Conclusion】Continuous application of CaO and Organic+CaO on acidic soil promoted the maize growth and development. However,from the yield prospective,when using Organic+CaO as soil conditioner in the southeastern region of Liaoning,continuous application for more than two years should be avoided.

Key words: Acidic soil, Maize, Soil conditioner, Yield, Yield components

CLC Number: 

  • S156