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[Effects of combined addition of organic materials with zinc fertilizer on zinc availability and transformation in calcareous soil]. | LitMetric

AI Article Synopsis

  • A study was conducted to analyze how different organic materials affect the availability and transformation of zinc (Zn) in calcareous soils amended with Zn fertilizer.
  • Results showed that adding Zn fertilizer alone or with organic materials significantly increased both total Zn and DTPA-Zn concentrations, with chicken manure being the most effective organic amendment.
  • While combining Zn fertilizer with organic materials improved soil conditions and zinc mobility, using straw was identified as the most environmentally friendly and cost-effective option for enhancing Zn availability.

Article Abstract

To investigate the changes of Zn availability and transformation in calcareous soil, orga-nic materials (maize straw, biofertilizer, fulvic acids, and chicken manure) were thoroughly mixed with the soils amended with Zn fertilizer in the nylon net bags and buried in a field. Results showed that compared with control (neither Zn nor organic materials), Zn fertilizer alone and combined addition with organic materials significantly increased soil total Zn concentration (7.2%-13.8%) and DTPA-Zn concentration (2.1-2.8 folds). For the Zn amended treatments, the contributions of organic amendments to soil total Zn and DTPA-Zn concentration decreased in the order of chicken manure > biofertilizer > maize straw > fulvic acids. The highest conversion rate of exogenous Zn into DTPA-Zn occurred in the treatments with straw and biofertilizer. In comparison with single Zn application, combination of Zn fertilizer with organic materials increased soil organic matter and stimulated more Zn weakly bound to organic matter, enhanced mobility factor and reduced distribution index of Zn in soil. The differences in soil Zn availability and transformation among the combinations of Zn fertilizer and organic materials were likely linked to the inherent properties of organic materials such as maturity degree and Zn content. Considering the environment safety and cost reduction, combining Zn fertilizer and straw return was the best practice to enhance Zn availability in the Zn-deficient calcareous soil, although its contribution to Zn availability was less than the combination of biofertilizer or chicken manure with Zn fertilizer.

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Source
http://dx.doi.org/10.13287/j.1001-9332.201908.038DOI Listing

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