THE EFFECT OF AMOUNT OF WATER SUPPLY BASED ON DIFFERENT METHODS TO DETERMINE WATER NEEDS IN THE DRIP FERTIGATION SYSTEM ON THE GROWTH AND BIOMASS OF PAGODA MUSTARD PLANTS (BRASSICA RAPA SUBSP. NARINOSA)

• Main Author: Muhammad Azka, Khalish
• Format: Final Project
• Language: Indonesia
• Subjects: Teknologi
• Online Access: https://digilib.itb.ac.id/gdl/view/57111
• Institution: Institut Teknologi Bandung

The increasing demand for water and the decreasing area of potential agricultural land in Indonesia have forced agricultural actors to increase the efficiency of water use to maintain agricultural productivity. By knowing the plant's water needs, the volume and timing of water supply can be planned more precisely. The drip irrigation system is an irrigation that has low pressure and discharge and the application of water is only in the area around the plant roots so that water efficiency can range up to 80-85%, much higher than the conventional-flood irrigation system which is only about 50%. Horticultural products are one of the agricultural products that have a high level of demand, with data on the increase in the need for horticultural products in Indonesia every year that can reach 8-15%. The purpose of this study was to determine the effect of the amount of water applied to growth (plant height, number of leaves, and canopy area), biomass yield (wet weight, dry weight, moisture content, and harvest index) of Pagoda mustard (Brassica rapa subsp. narinosa) at drip fertigation system. The study was conducted from December 1, 2020 to January 15, 2021 at the Habibi Garden Company Land (PT. Habibi Digital Nusantara), Arcamanik District, Bandung City, West Java. The type of research is correlative-quantitative, which was carried out using 3 treatment designs for determining water demand, namely P1 (Pennman-Monteith empirical method), P2 (Literature Reference Method), and P3 (Actual Weighing Method). The results showed that the amount of water applied did not affect plant growth (plant height, number of leaves, and canopy area) but did affect the yield of biomass (wet weight, dry weight, and harvest index) in Pagoda mustard (Brassica rapa subsp. narinosa). Then based on the mass balance calculation, the total mass input and output in the Pagoda mustard cultivation system is 5.039,70 g/polybag/production. As for the energy balance calculation, the total input is 25.686,71 kJ/polybag/production and the total output is 12.490,55 kJ/polybag/production so that the heat loss is 13.196,15 kJ/polybag/production.