• ISSN 1008-505X
  • CN 11-3996/S
XU Shao-qi, CHEN Wen-jie, XIE Lin-qi, CHAI Sheng-yang, JIA Kai-xue, WEI Yu-quan. Organic waste resources and nutrient utilization potential in China[J]. Journal of Plant Nutrition and Fertilizers, 2022, 28(8): 1341-1352. DOI: 10.11674/zwyf.2021663
Citation: XU Shao-qi, CHEN Wen-jie, XIE Lin-qi, CHAI Sheng-yang, JIA Kai-xue, WEI Yu-quan. Organic waste resources and nutrient utilization potential in China[J]. Journal of Plant Nutrition and Fertilizers, 2022, 28(8): 1341-1352. DOI: 10.11674/zwyf.2021663

Organic waste resources and nutrient utilization potential in China

  • Objectives The production of organic waste in China is huge, so sorting out the total amount of organic waste and the amount of nutrient resources in China is pertinent for an optimum utilization of nutrient resources in organic waste, which is of great significance to ensure the zero growth of chemical fertilizer use and national food security.
    Methods From 2009 to 2019, estimation of nutrient resources and analysis of utilization potential were determined in typical organic wastes in China—straw, livestock manure, rural human manure, sludge, and domestic organic waste, using the statistics and published literature.
    Results The annual amount of organic waste resources and total nutrients was relatively stable from 2009 to 2019. The average total organic waste (dry weight) was 1.29 billion tons, and the average nutrient content (N, P2O5, K2O) was 45.38 million tons. In 2019, waste resources reached 1.31 billion tons (dry weight), an increase of 7.1% compared with 2009. The total amount of nutrients reached 45.04 million tons, an increase of 3.0% compared with 2009. In 2019, the total amount of organic waste returned to the field contained about 16.53 million tons of N, 7.996 million tons of P and 20.51 million tons of K, accounting for 71.8%, 75.9%, and 153.2% of crop nutrient demand, respectively. The N and K contents of straw were the highest, accounting for 46.3% (N) and 65.8% (K2O) of the total nutrients in organic waste, respectively. The P contents of animal manure were the highest, accounting for 54.5% (P2O5) of the total nutrients in organic waste.
    Conclusions The annual production and nutrient resources of organic wastes in China in the last ten years remain at a high level with a broad utilization potential. Under the condition that the nutrient resource structure of organic waste in China remains unchanged and the total amount of organic waste is returned to the field, nitrogen, phosphorus and potassium nutrients in organic waste can meet 71.8% (N), 75.9% (P2O5) and 100% (K2O) of crop nutrient requirements.
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