Acta Agriculturae Zhejiangensis ›› 2025, Vol. 37 ›› Issue (6): 1301-1308.DOI: 10.3969/j.issn.1004-1524.20241073

• Environmental Science • Previous Articles     Next Articles

Effects of chemical fertilizer reduction combined with soil conditioner on soil acidity, soil nutrients and rice yield

ZHANG Zhi1(), HE Haohao1, YU Miao1, XU Jianfeng2   

  1. 1. Taizhou Agricultural Technology Extension Center, Taizhou 318099, Zhejiang, China
    2. Linhai Agricultural Technology Extension Center, Linhai 317099, Zhejiang, China
  • Received:2024-12-09 Online:2025-06-25 Published:2025-07-08

Abstract:

The effect of chemical fertilizer reduction combined with different soil conditioners on soil acidification and rice yield were studied via a 3-year stationary field experiment. There were 9 fertilization treatments: CK, no fertilization; CF, conventional chemical fertilizaiton; RF, chemical fertilizer reduction; T1, RF+swine manure; T2, RF+lime; T3, RF+ “Natures” soil amendment; T4, RF+organic soil amendment; T5, RF+ “Fengshouyan” soil amendment; T6, RF+high calcium soil amendment. It was shown that, compared with the CF treatment, T1-T6 treatments significantly (P<0.05) elevated soil pH value by 0.44-1.39, reduced soil exchangeable H+ content, exchangeable Al3+ content and exchangeable acidity by 22.8%-39.7%, 33.3%-69.4%, 30.8%-60.4%, respectively, and increased soil exchangeable Ca2+ content, cation exchange capacity, base-exchangeable ions content and base saturation by 63.2%-120.5%, 9.8%-18.5%, 56.4%-95.4% and 42.2%-66.5%, respectively. Besides, the early rice yield under T1, T4, T5 treatments was significantly higher than that under the CF treatment by 20.5%, 16.7%, 9.9%, respectively. Under the experiment conditions, reduction of chemical fertilization rate combined with 3 000 kg·hm-2 organic soil amendment exhibited the best effect on mitigating soil acidification and increasing rice yield.

Key words: chemical fertilizer reduction, soil conditioner, soil acidification, soil nutrient, rice yield

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