LIQUID DAIRY MANURE IMPROVED THE SHORT-TERM PHYSICAL QUALITY OF AN ARGIUDOLL

Aline  Martineli Batista; Eugenia  Oggero; Silvia  Imhoff; Pablo  Ghiberto

doi:10.29393/CHJAAS42-16LDAP40016

Autores/as

Aline Martineli Batista Instituto de Ciencias Agropecuarias del Litoral (ICiAgro Litoral), Universidad Nacional del Litoral, Consejo Nacional de Investigaciones Científicas y Técnicas (UNL-CONICET). Facultad de Ciencias Agrarias (FCA-UNL), Kreder 2805, CP: S3080HOF, Esperanza, Argentina / Embrapa Meio Ambiente, SP-340, km 127 - S/N, CEP: 13918-110, Jaguariúna - SP, Brazil https://orcid.org/0000-0001-8173-6607
Eugenia Oggero Instituto de Ciencias Agropecuarias del Litoral (ICiAgro Litoral), Universidad Nacional del Litoral, Consejo Nacional de Investigaciones Científicas y Técnicas (UNL-CONICET). Facultad de Ciencias Agrarias (FCA-UNL), Kreder 2805, CP: S3080HOF, Esperanza, Argentina https://orcid.org/0009-0008-4295-7923
Silvia Imhoff Instituto de Ciencias Agropecuarias del Litoral (ICiAgro Litoral), Universidad Nacional del Litoral, Consejo Nacional de Investigaciones Científicas y Técnicas (UNL-CONICET). Facultad de Ciencias Agrarias (FCA-UNL), Kreder 2805, CP: S3080HOF, Esperanza, Argentina https://orcid.org/0000-0001-7330-9728
Pablo Ghiberto Instituto de Ciencias Agropecuarias del Litoral (ICiAgro Litoral), Universidad Nacional del Litoral, Consejo Nacional de Investigaciones Científicas y Técnicas (UNL-CONICET). Facultad de Ciencias Agrarias (FCA-UNL), Kreder 2805, CP: S3080HOF, Esperanza, Argentina https://orcid.org/0000-0001-8039-5206

DOI:

https://doi.org/10.29393/CHJAAS42-16LDAP40016

Palabras clave:

chemical properties, physical properties, global physical quality index, least limiting water range

Resumen

The application of liquid dairy manure (LDM), which is an effluent generated in dairy production facilities from a mixture of feces, urine, milking-parlor wash water, and feed residues, can be a sustainable alternative to improve soil quality. This study aimed to determine the effect of different LDM doses on chemical and physical fertility indicators and overall quality of a silt loam Typic Argiudoll cultivated under no-till. The experiment was conducted using a randomized block design with three blocks and four treatments (LDM doses): D0, no application; D1, 60 m³ha^?1; D2, 120 m³ha^?1; and D3, 180 m³ha^?1. LDM was applied five days before sorghum planting, in November 2019. Chemical properties were evaluated 10 days later. Physical properties and aboveground biomass were assessed in March 2020. Global index of soil physical quality (GISPQ) and least limiting water range (LLWR) were also obtained as indicators of overall quality. Increasing LDM dose resulted in progressively lower soil bulk density (from 1.40 in D0 to 1.37 g cm^?3 in D3), penetration resistance, effective stress, and higher organic matter (+29% from D0 to D3), biomass (up to +26%), nutrient concentrations and electrical conductivity (from 0.6 to 2.0 dS m^?1), while pH remained unaltered. GISPQ and LLWR reflected significant differences between D0 and D1 compared to D2 and D3. LDM doses D2 and D3 improved short-term soil structural quality, mainly due to their greater contribution of organic matter, supporting the hypothesis that appropriate LDM application rates can enhance soil physical quality in the short term despite the associated increase in soluble salts. The results suggest that LDM is a viable alternative for the sustainable management of agricultural systems and for reducing their negative environmental impact. However, the observed increase in electrical conductivity indicates that soil salinity should be monitored to prevent potential long-term risks to crop yield.