Uji Potensi Mikroba Indigenous untuk Meningkatkan Pertumbuhan Tanaman Bayam Merah (Amaranthus Tricolor L.) pada Tanah Salin

Abstract

Saline soil is one of the problems in cultivating plants. This is because high salinity can cause plant growth to be inhibited due to the decrease in osmotic pressure, making it difficult to take nutrients by the roots. Unlike the red spinach plant, this plant is tolerant to salinity stress. However, the presence of salinity stress will affect the growth of red spinach plants. To overcome this, we can utilize indigenous bacteria that can help reduce salt absorption and help plants live through their ability to convert and absorb several chemical compounds through the ACC deaminase enzyme they produce. The purpose of this study was to test the potential of indigenous microbes on the growth of red spinach plants (Amaranthus tricolor L.) in saline soil. This research was conducted at the Soil Biology Laboratory of the Agrotechnology Study Program, Faculty of Agriculture, University of North Sumatra, Medan in October 2023 until completion. This study used a Non-factorial Completely Randomized Design (CRD) with treatment N0 (Without Microbial Feeding): Control; N1 (Giving Microbial Isolate 1); N2 (Giving Microbial Isolate 2); N3 (Giving Microbial Isolate 3); N4 (Giving Microbial Isolate 4); N5 (Giving Microbial Isolate 5); N6 (Giving Microbial Isolate 6); N7 (Giving Microbial Isolate 7); N8 (Giving Microbial Isolate 8); N9 (Giving Microbial Isolate 9); N10 (Giving Microbial Isolate 10). The results showed that the application of Indogeneus bacteria gave no significant effect on soil pH, root wet weight and root dry weight, had a significant effect on the parameters of plant crown wet weight, plant crown dry weight, plant height at 4-6 weeks, number of leaves at 1 week, 4 weeks, 5 weeks, 6 weeks and plant stem diameter.