Measurement and estimation of the fertiliser value of pig slurry by physicochemical models: usefulness and constraints
MetadataShow full item record
Pig slurries (PS) are widely applied to soil as fertilisers. Compositional variability, as shown in this study, is the main constraint on their efficient use. Slurry samples, collected from 126 commercial pig farms were analysed and organic nitrogen (ON), ammoniacal nitrogen (AN), total nitrogen (TN),
total potassium (TK), total phosphorus (TP) content, pH, EC (electrical conductivity), DM (dry matter) and OM (organic matter) quantified. Relationships between major nutrient contents of PS and its physical and chemical properties were analysed. AN and TK were linearly related to EC (p < 0.0001) for values lower than 5.6 kg [AN] m−3 and 5 kg [TK] m−3 with coefficients of determination (R2) of 0.86 and 0.58 respectively, in agreement with previous linear models. At higher AN values (which means EC > 40 dS m−1) linearity cannot be maintained, which has important consequences for direct slurry EC measurements. ON and TP in slurries were closely related (p < 0.0001) to DM with R2 of 0.90 and 0.68 respectively.
Is part ofBiosystems Engineering, 2012, vol. 111, núm. 2, p. 206-216
European research projects
Showing items related by title, author, creator and subject.
Pig slurry and mineral fertilization strategies' effects on soil quality: Macroaggregate stability and organic matter fractions Yagüe Carrasco, María Rosa; Bosch Serra, Àngela D.; Antúnez Pujol, Montserrat; Boixadera Llobet, Jaume (Elsevier, 2010)Applying pig slurry to the land as fertilizer at appropriate agronomic rates is important to close nutrient cycles and optimize the value of organic matter. However a long-term discussion has taken place about its effects ...
Long term application of dairy cattle manure and pig slurry to winter cereals improves soil quality Domingo Olivé, Francesc; Bosch Serra, Àngela D.; Yagüe Carrasco, María Rosa; Poch, Rosa M.; Boixadera Llobet, Jaume (Springer Verlag, 2016)Organic fertilizers (manures and slurries) applied repeatedly over many cropping seasons favourably influence nutrient recycling, maintenance of soil organic matter (SOM), and improve soil quality parameters such as soil ...
Bosch Serra, Àngela D.; Yagüe Carrasco, María Rosa; Poch, Rosa M.; Molner, M.; Junyent, B.; Boixadera Llobet, Jaume (British Society of Soil Science, 2017-07-13)Effects of applications of pig slurry on soil aggregate stability are not well understood in dryland agriculture. This research aims to (i) identify aggregate stability tests that give a reliable description of the soil's ...