Journal of Zhejiang Agricultural Sciences ›› 2026, Vol. 67 ›› Issue (2): 510-519.DOI: 10.16178/j.issn.0528-9017.20250191

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Potential estimation of substituting chemical fertilizers with livestock manure in Shandong Province of China

GE Xincheng1(), ZHANG Haiyan2, QIN Kaixuan3, ZHANG Liang1, CHEN Yang4, WANG Haojiang1, CHEN Lei4, YAO Jing2()   

  1. 1.Linyi Agricultural Technology Extension Center,Linyi 276000,Shandong
    2.Linyi Academy of Agricultural Sciences,Linyi 276000,Shandong
    3.Mengyin Agricultural and Rural Development Service Center,Linyi 276000,Shandong
    4.Linyi Livestock Development Promotion Center,Linyi 276000,Shandong
  • Received:2025-03-20 Online:2026-02-28 Published:2026-03-07

Abstract:

Shandong Province is a crucial production base for agricultural and livestock products in China,with significant potential for developing integrated crop-livestock eco-circular agriculture. Assessing the distribution of nutrient resources in livestock manure provides a scientific basis for formulating policies on manure utilization and chemical fertilizer reduction in Shandong. Based on statistical yearbooks and literature data,this study estimates the distribution of nutrient resources from livestock manure in Shandong,calculates the nutrient requirements of major crops,and analyzes the potential for replacing chemical fertilizers with manure. The results show that in 2022,the total manure production in Shandong's prefecture-level cities reached 101.793 8 million tons,including 63.704 7 million tons of solid manure and 38.089 1 million tons of urine. After accounting for nutrient losses during collection,storage,and treatment,the total nutrients available from livestock manure were estimated at 0.739 4 million tons,comprising 0.309 2 million tons of N,0.111 8 million tons of P2O5,and 0.318 4 million tons of K2O. If all manure nutrients were fully utilized in farmland,they could meet 20.02% of the nutrient demand of major crops and replace 20.42% of chemical fertilizers applied during the same period. This would reduce the chemical fertilizer application intensity per sown area from 330.24 kg·hm-2 to 262.80 kg·hm-2. Nutrient resources from livestock manure vary across different regions of Shandong. Tailored strategies to improve manure utilization efficiency are essential for promoting green and sustainable agricultural development in the province.

Key words: Shandong Province, livestock manure, nutrient requirement, fertilizer substitution

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