Enmiendas orgánicas aplicadas en cultivos hortícolas protegidos con suelos vertisoles

In the horticultural belt of Gran La Plata, the application of organic amendments of animal origin to the soil is widespread, however their consequences on the soil and productive variables are not studied. The objective of this work was to analyze the effect of applying uncomposted and composted poultry bedding on the salinity and alkalinity of a soil with vertic properties in a greenhouse, with lettuce and tomato crops. Treatments: T1 (control), T2 (fresh chicken litter, dose 30 t.ha-1), T3 (compost chicken bed, dose 47.3 t.ha-1), T4 (double dose T3). Soil variables analyzed: pH, EC and RAS. In crop, yield and size of the fruits were studied. The results showed that the incorporation of organic amendments did not affect the pH. Salinity (CE) increased with higher concentrations in T4 (max 9.33 dS.m-1). Alkalinity was also high at all sites. In yield: the lettuce crop did not present a significant difference between treatments (18,7-21,05 t.ha-1). In tomato, T1 was significantly lower during the first cycle, difference that disappeared in the second cycle (183-216 t.ha-1). The quality of the fruits in the first tomato cycle was lower in T2, with a greater quantity of second rate fruits, T4 had a greater quantity of fruits with BER. These results show that organic amendments of animal origin, applied fresh and composted in high doses, salinize soils. It is very important to continue with these studies to adjust application doses and also find sustainable alternatives for the management of horticultural soils.