Physical properties and organic carbon content of a Rhodic Kandiudox fertilized with pig slurry and poultry litter

Abstract

SUMMARYThe impact of pig slurry and poultry litter fertilization on soils depends on the conditions of use and the amounts applied. This study evaluated the effect of organic fertilizers after different application periods in different areas on the physical properties and organic carbon contents of a Rhodic Kandiudox, in Concordia, Santa Catarina, in Southern Brazil. The treatments consisted of different land uses and periods of pig and poultry litter fertilization: silage maize (M7 years), silage maize (M20 years), annual ryegrass pasture (P3 years), annual ryegrass pasture (P15 years), perennial pasture (PP20 years), yerba mate tea (Mt20 years), native forest (NF), and native pasture without manure application (P0). The 0-5, 5-10 and 10-20 cm soil layers were sampled and analyzed for total organic carbon, total nitrogen and soil physical properties such as density, porosity, aggregation, degree of flocculation, and penetration resistance. The organic carbon levels in the cultivated areas treated with organic fertilizer were even lower than in native forest soil. The organic fertilizers and studied management systems reduced the flocculation degree of the clay particles, and low macroporosity was observed in some areas. Despite these changes, a good soil physical structure was maintained, e.g., soil density and resistance to penetration were below the critical limits, whereas aggregate stability was high, which is important to reduce water erosion in these areas with rugged terrain in western Santa Catarina, used for pig and poultry farming.Index terms: biofertilizer, soil quality, soil structure.(1) Received for publication in May 02, 2011 and approved in April 13, 2012 (2)

Aggregation and clay dispersion of an oxisol treated with swine and poultry manures

“…These results are consistent with those of Hati et al (2006), Bandyopadhyay et al (2010), Rauber et al (2012) and Balota et al (2014), who reported an increase in dissociated and reactive carboxylic groups, producing a negative charge in the soil after the application of manure and causing a subsequent increase in the biological activity and soil aggregation.…”

Changes in physical properties and organic carbon of a Kandiudox fertilized with manure

“…In the NF control treatment, values of TOC, POC, and C:N ratio were higher. This shows that land use in crop production systems, regardless of pig slurry and poultry manure application, reduced the TOC content in relation to the natural soil conditions, which can alter the soil quality (RAUBER et al 2012). COMIN et al (2013) applied pig slurry for eight years to a Neosol under no-tillage management and reported no increase in TOC content.…”

Content of phenolic compounds in soils originating from two long-term fertilization experiments

“…Fertilization with slurry results in an increase in the the content of SOM, not only in the top layer of soil, but also in deeper layers of the soil profi le (Matsi 2012). Under unfavourable conditions, a low value for the ratio of TOC:N tot (4.8-8.4:1) may result in the decomposition of soil humus and, as a consequence, may lead to both a reduction in the amount of SOM in the soil, and the emergence of undesirable organic compounds (Rochette et al 2000, Rauber et al 2012, Chantigny et al 2001, Fangueiro et al 2014. It should also be noted that the organic substance included in slurry gets into the soil with a large volume of water and, therefore, during the fi rst period following the fertilization, the soil becomes more moist, which may affect the rate of decomposition of the organic substance and the formation of specifi c organic compounds.…”