ACTA AGRICULTURAE BOREALI-SINICA ›› 2021, Vol. 36 ›› Issue (3): 133-141. doi: 10.7668/hbnxb.20191691

Special Issue: Rice Soil fertilizer Hot Article

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

Effects of Long-term Substitution of Inorganic Fertilizers with Organic Fertilizers on Rice and Wheat Yields and Soil Fertility

LIU Mingyue1, ZHANG Kaiming1, MAO Wei1,2, JU Jing1, MI Wenhai1, ZHAO Haitao1   

  1. 1. College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China;
    2. Yangzhou Station of Farmland Quality Protection, Yangzhou 225101, China
  • Received:2021-02-26 Published:2021-06-28

Abstract: In order to explore the effect of organic fertilizers substitute for inorganic fertilizers on rice and wheat yields and soil fertility under rice and wheat rotation system in the lower reaches of the Yangtze River,the treatments of 10% organic fertilizer (Y1W9),20% organic fertilizer (Y2W8),30% organic fertilizer (Y3W7),40% organic fertilizer (Y4W6),50% organic fertilizer (Y5W5) substitute for inorganic nitrogen in turn and 100% inorganic nitrogen as control (W100) were conducted.The changes of rice and wheat yield,soil fertility and aggregate stability were located monitored for 3 consecutive years.The results showed that the average annual crop rotation output of organic fertilizer replaced inorganic N fertilizer increased by 0.8%-2.7% compared with inorganic fertilizer alone. Compared with inorganic fertilizer alone, the average yield of wheat increased by 5.6% to 13.2%, the average yield of rice increased by 0.2% to 14.0%, and the total output of rice-wheat rotation increased by 0.4% to 24.5% on average in 3 a.Compared with inorganic fertilizer alone, the average mean weight diameter (MWD),geometric mean diameter (GMD) and>0.25 mm water-stable aggregate contents increased with increasing of the ratio of organic fertilizer substitute for inorganic fertilizer.The content percentages of aggregates>0.250 mm in the treatments of Y4W6 and Y5W5 were 74.3% and 78.8%, respectively, which were higher than the percentages of aggregates with a particle diameter of >0.250 mm under the other treatments, and were higher than the single application of inorganic fertilizer 5.6 and 10.1 percentage points.Different ratio of organic fertilizer substitute for inorganic fertilizer improved the content of soil organic matter and total nitrogen,and alleviated the degree of soil acidification.In summary,organic fertilizer substitute for inorganic fertilizer in the long term was contributing to improving soil fertility and getting stable yield of rice and wheat in the lower the Yangtze River.20% organic fertilizer substitute for inorganic fertilizer was the most beneficial to getting high and stable yield of rice and wheat,and improvement of soil fertility in the lower reaches of the Yangtze River.

Key words: Combined application of organic fertilizer and inorganic fertilizer, Rice and wheat yield, Soil nutrients, Soil aggregate

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Cite this article

LIU Mingyue, ZHANG Kaiming, MAO Wei, JU Jing, MI Wenhai, ZHAO Haitao. Effects of Long-term Substitution of Inorganic Fertilizers with Organic Fertilizers on Rice and Wheat Yields and Soil Fertility[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2021, 36(3): 133-141. doi: 10.7668/hbnxb.20191691.

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