Testing of lollo rossa lettuce varieties (Lactuca sativa var. crispa) on different ammonium-nitrate ratio in the hydroponic nutrient solution

Abstract

The study aims to determine the variety of lollo rossa lettuce that has high growth and production, to find out the ratio of ammonium and nitrate which gives the best effect on the growth and production of lollipop rossa lettuce and to determine the parameters that have high heritability values. The study was conducted at the Unhas Lecturer Housing screen house, Jalan Al Ghazaly, Block BG number 91, Tamalanrea, Makassar, which took place from October to December 2018. The study used a factorial experimental design in the nested pattern, namely: 8 varieties of Lollo Rossa lettuce (Olga Red, Arista, Concorde Rz, Amandine Rz, Rosano, Mr. Fothergills, Sais, and Century) nested in each ratio of ammonium and nitrate consisting of 4 levels, namely: AB Mix, 1 ammonium: 4 nitrate, 1 ammonium: 6 nitrate, and 1 ammonium: 8 nitrates. The results showed that the lollo rossa lettuce varieties which had high growth and production were Mr. Fothergills variety (140.75 g) and Concorde Rz varieties (129.96 g). Nutrients that provided growth and high production in the lollo rossa lettuce was a ratio of 1 ammonium: 4 nitrate (115.25 g). All observational parameters had high heritability values in the lollo lettuce (parameters of plant height, number of leaves, shoot root ratio, chlorophyll index, and production).