Pengaruh Konsentrasi Pupuk Organik Cair terhadap Pertumbuhan dan Hasil Tanaman Selada (Lactuca sativa L.) Varietas Grand Rapids dan Olga Red

Abstract

Lettuce is one of the most popular vegetables even abroad. To produce more optimal lettuce, NASA Liquid Organic Fertilizer (POC) is one solution that can be done to support the availability of nutrients for lettuce plants. This study aims to determine the best interaction and concentration on the growth of two different lettuce varieties, namely grand rapids and olga red. The study was conducted at the Experimental Garden of the Faculty of Agriculture, Winaya Mukti University with an altitude of 850 m above sea level from March to May 2024. The experiment used an experimental method with a Randomized Block Design (RAK) factorial pattern of 4x2 with 4 replications, so that 8 treatment combinations and 32 experimental units were obtained. The first factor is the concentration of POC with a level of p0 = 0 mL L-1 water, p1 = 2 mL L-1 water, p2 = 4 mL L-1 water, p3 = 6 mL L-1 water and the second factor is lettuce varieties v1 (grand rapids) and v2 (olga red). Data were analyzed using the F test and continued with Duncan's Multiple Range Test at the 5% level. The results showed that there was an interaction between NASA Liquid Organic Fertilizer (POC) and lettuce varieties grand rapids and olga red on the number of lettuce leaves aged 21 HST, fresh plant weight, and Root Destruction Ratio but there was no interaction on the observation parameters of plant height and dry weight per plant. The concentration of NASA liquid organic fertilizer (POC) that showed the best results on the growth and yield of lettuce plants of grand rapids and olga red varieties was the treatment concentration p1 (2 mL L-1). Keywords: Grand Rapids; Olga Red; POC NASA; Lettuce.