Consecutive Applications of Mineral Fertilizer or Animal Wastes and Effects on soil Phosphorus after Thirteen Years of no-tillage

• Published in: Journal of soil science and plant nutrition 2024-06, Vol.24 (2), p.2607-2618
• Main Authors: Marchezan, Carina, Abdala, Dalton B., Boitt, Gustavo, Ferreira, Paulo Ademar Avelar, Ceretta, Carlos Alberto, da Silva, Isley Cristiellem Bicalho, Tiecher, Tales, Gatiboni, Luciano Colpo, Thoma, Ana Laura, Palermo, Natália Moreira, Lourenzi, Cledimar Rogério, Schmitt, Djalma Eugênio, Kulmman, Matheus Severo, Brunetto, Gustavo
• Format: Article
• Language: English
• Subjects: Accumulation; Agriculture; Animal wastes; Biomedical and Life Sciences; Cattle manure; Contamination; Deoxyribonucleic acid; DNA; Ecology; Environment; Fertilizers; Fractionation; Goethite; Investigations; Kaolinite; Life Sciences; Litter; Litter size; Manures; Mineral fertilizers; Original Paper; Phosphorus; Pig manure; Plant nutrition; Plant Sciences; Slurries; Soil analysis; Soil chemistry; Soil investigations; Soil layers; Soil Science & Conservation; Soils; Swine; Wastes; X ray absorption
• ISSN: 0718-9508; 0718-9516
• DOI: 10.1007/s42729-024-01683-3

This study aimed to investigate the impact of long-term repeated applications of different animal waste types and mineral fertilizer on soil phosphorus (P) fractions and chemical nature of P species. A long-term field experiment was conducted for 13 years on a sandy Alfisol in Santa Maria, southern Brazil. The treatments consisted of pig slurry, dairy slurry, pig deep-litter, mineral fertilizer, and an unfertilized control. Soil samples were taken from the 0–4 cm layer in July 2017 and analyzed using sequential chemical P fractionation, P K-edge X-ray Absorption Near Edge Structure (P-XANES), and µ-fluororescence spectroscopies. The continuous application of pig slurry, dairy slurry, and mineral fertilizer resulted in P accumulation in soils beyond the levels required for adequate plant nutrition. Pig deep-litter promoted P accumulation in more labile fractions, above all in the inorganic P form, while pig slurry, cattle slurry and mineral fertilizer increased more stable P fractions. The P-XANES analysis showed the association of goethite-bound P (69–72%) regardless of the source added to soil, while the formation of secondary species such as Ca-P, P-kaolinite, and DNA varied among animal wastes. The relative proportion of organic P as DNA was higher in pig slurry. Pig deep-litter and mineral fertilizer promoted the accumulation of species of amorphous-Ca-P. The long-term application of different types of animal waste and mineral fertilizer led to the accumulation of P in soils, with each source promoting accumulation in different species. Graphical Abstract