Prueba de tres fuentes de nitrógeno orgánico con diferentes niveles de aportación en el rendimiento de lechuga crespa Lactuca sativa L. Var. crispa)

Abstract

This research considers: to prove three sources of organic nitrogen with different contribution levels in the yield of Crisp lettuce (Lactuca sativa L. Var. crispa), canton Riobamba, province of Chimborazo; using the randomized complete block experimental design (RCBD) with three repetitions in arrangement of divided plots. Nine treatments were the result of combining three sources of organic nitrogen; earthworm humus (A), Eco-Abonaza (A2) and Ferthigue (A3) with three levels of nitrogen level under 60 kg N/ha (B1), middle level 120 kg N/ha (B2) and high level 180 kg N/ha (B3). There were differences between the sources of nitrogen used in the test in apprehension percentage, plant height (20 days after transplantation), number of leaves (60 days after transplantation), yield (kg/net parcel and kg/ha). It was found that the best source of organic nitrogen was Ferthigue (A3) and the best application level was 120 kg N/ha (B2). The best yield reached Ferthigue with 120 kg N/ha (A3B2) with 20647.22 kg/ha. The treatment Eco-Abonaza with 120 kg N/ha (A2B2) presented the greatest net benefit that was 9754.53 USD/ha with costs that vary from 989 USD/ha and treatment with a lower net profit was earthworm humus and 180 kg N/ha (A1B3) with 5776.42 USD/ha with costs that vary from 3199.62 USD/ha. The highest marginal rate of return was Eco-Abonaza treatment with 120 kg N/ha (A2B2) reaching 426.32%. In conclusion, from an agronomic poin of view is recommended to use 2.4 tn of Ferthigue/ha and 970 kg Sulpomag/ha, to achieve the highest performance and use 4,14 tn of Eco-Abonaza/ha and 572.67 kg Sulpomag/ha, to obtain the biggest profitability