Evaluación del rendimiento del cultivo de lechuga (Lactuca sativa l.) var. winterhaven con dos tipos de agua y tres dosis de materia orgánica en Tunshi-Espoch

Abstract

This investigation aimed to evaluate the yield of lettuce (Lactucasativa L.) var. Winterhaven with two types of water and three doses of organic matter (poultry manure) at Tunshi-Espoch. The methodology implemented was quantitative, using a completely randomised block design (CRBD), in a split-plot arrangement with six treatments and three replicates (2 x 3 x 3). In the agronomic behaviour, data on phenological variables (plant height, number of leaves, days to cabbage formation, days to harvest, dry matter) and productive variables (equatorial diameter, cabbage weight, yield) were analysed, recorded, and calculated in the field. Water quality was analysed before and after the phytoremediation treatment. In the economic study, the cost-benefit ratio of the treatments under study was determined as well as the type of water and dose of poultry manure influenced the agronomic and productive behaviour of the lettuce in the following variables: plant height with an average of 20.94 cm, number of leaves (10.35), days to cabbage formation (55.42 days), days to harvest (70.73 days), equatorial diameter (17.07 cm), percentage of dry matter (6.02%), cabbage weight (1 134.84 g). The phytoremediation is positive in parameters that are reflected in the traffic light (green) such as pH (7), nitrates (2.30 mg/l), phosphate (8.0 mg/l), sulphate (62.80 mg/l), iron (0.118 mg/l), copper (0.020 mg/l), zinc (0.028 mg/l) and zinc (0.028 mg/l), sulphate (62.80 mg/l), iron (0.118 mg/l), copper (0.020 mg/l), zinc (0.028 mg/l). The highest B/C ratio (1.95) was found in the treatment (A1B3) using irrigation water and a high dose of poultry manure (3 t/ha). From these results, it was concluded that the best yield in the Winterhaven lettuce crop under the soil and climatic conditions of the Tunshi Experimental Station was obtained in the treatment using a high dose of poultry manure (3.0 t/ha) with 40 923.08 kg/ha.