FARM DAIRY EFFLUENT APPLICATION ON AN ARGIUDOLL  CULTIVATED WITH ALFALFA (Medicago sativa L.): BIOMASS  PRODUCTION AND PERSISTENCE

Pablo Ghiberto; Javier Baudracco; Pablo Heffner; Silvia Imhoff

doi:10.29393/CHJAA38-33DPKT10033

Autores/as

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)
Javier Baudracco 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/0000-0002-4090-3154
Pablo Heffner Facultad de Ciencias Agrarias (FCA-UNL), Kreder 2805, CP: S3080HOF, Esperanza, Argentina.
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

DOI:

https://doi.org/10.29393/CHJAA38-33DPKT10033

Resumen

The intensification of dairy production systems has resulted in a higher generation of waste. The aim of this study was to evaluate the impact of different doses of farm dairy effluent (FDE) applied to the soil on aerial biomass production, persistence and chemical composition of alfalfa pastures, in Santa Fe province, Argentina. The study was conducted in four randomized complete blocks with four treatments (FDE doses): 0 m3 ha-1 (T0: without FDE), 82 m3
ha-1 (T1: low rate), 151 m3 ha-1 (T2: medium rate) and 282 m3 ha-1 (T3: high rate). The soil application of FDE increased the total aerial biomass produced (ABP) but reduced the persistence of plants. Total nitrogen (Nt) of alfalfa was significantly higher, but phosphorus (P) concentrations did not vary after the application of FDE to the soil . Ca and Mg concentrations in plants were lower in T3 compared to T0, which can be explained by the imbalance produced in the soil after FDE was applied, presenting high levels of Na, K and NH4-N but low levels of Ca and Mg. Soil application of FDE on alfalfa pastures must be carefully planned in terms of composition and amount to be applied in order to increase biomass production, prevent the decrease in persistence, and control changes in the mineral composition of plants.