Advanced slurry processing (anaerobic digestion, acidification and separation) is being promoted to generate renewable energy, reduce ammonia emissions and optimise storage and transport, respectively. However, these processes could affect slurry phosphorus (P) forms and bioavailability, and hence P dynamics in soil after application. This study investigated the effect of slurry processing, viz. separation, acidification and anaerobic digestion on P forms and distribution of cattle slurry, as well as P dynamics in soil following application of mechanically separated solid and liquid cattle slurry. The results showed that acidification and anaerobic digestion had little impact on TP distribution among particle fractions of slurry, but had substantial influence on P speciation and distribution. Acidification increased the dissolved inorganic-P (IP–H2O) proportion in cattle slurry, by reducing the mineral surface adsorbed (IP–NaHCO3) and precipitated inorganic P (IP–HCl) proportion. Anaerobic digestion decreased OP-NaHCO3 proportion by degradation and increased the IP-NaHCO3 and IP-HCl proportion by adsorption and precipitation. Particles

中文翻译：

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酸化和厌氧消化改变了牛粪颗粒部分中磷的形态和分布以及施用后土壤中磷的动态

正在推广先进的泥浆处理（厌氧消化、酸化和分离），以分别产生可再生能源、减少氨排放和优化储存和运输。然而，这些过程会影响浆液磷 (P) 的形式和生物有效性，从而影响施用后土壤中的磷动态。本研究调查了浆料处理的影响，即。分离、酸化和厌氧消化对牛粪中磷的形成和分布，以及应用机械分离的固体和液体牛粪后土壤中的磷动态。结果表明，酸化和厌氧消化对泥浆颗粒部分中TP的分布影响不大，但对P的形态和分布有很大影响。酸化通过减少矿物表面吸附的 (IP-NaHCO3) 和沉淀的无机 P (IP-HCl) 的比例，增加了牛浆中溶解的无机 P (IP-H2O) 的比例。厌氧消化通过降解降低了 OP-NaHCO3 的比例，并通过吸附和沉淀增加了 IP-NaHCO3 和 IP-HCl 的比例。粒子