Co-composting of phosphogypsum, rice straw and chicken manure and its effect on soil improvement

doi:10.14088/j.cnki.issn0439-8114.2025.08.011

Abstract

Abstract: Rice straw was used as the main raw composting material and chicken manure was used to adjust the ratio of carbon to nitrogen, then 30% phosphogypsum according to the mass of dry straw was added to explore the effects of phosphogypsum on straw+chicken manure composting process and also the soil improvement of the compost products was investigated. The results showed that compost had significant decomposition and disintegration effects on straw and phosphogypsum. In the composting process, the duration of the high temperature period of the stack containing 30% phosphogypsum still met the requirement of harmless composting, and the temperature stability in the later stage of composting was improved. At the end of composting, the seed germination index value could reach 106.77%. The application effect of compost products in soil showed that compared with the straw+chicken manure compost product without phosphogypsum, the compost fertilizer with phosphogypsum could increase the saturated water content, field water capacity, electrical conductivity and available phosphorus content of soil. From the perspective of fertilization, the co-composting of phosphogypsum + straw + chicken manure had the potential to improve soil.

Key words: phosphogypsum, rice straw, chicken manure, co-composting, humification, soil improvement

CLC Number:

S141.4

HE Ying-lin, LI Wen-long, CHI Ru-an, SHI Jun-wei, LI Jian-fen, QIN Zhen-hua. Co-composting of phosphogypsum, rice straw and chicken manure and its effect on soil improvement[J]. HUBEI AGRICULTURAL SCIENCES, 2025, 64(8): 73-78.

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