Water footprint analysis on subsurface irrigation systems by evapotranspirative irrigation for Pakcoy (Brassica rapa L.) cultivation
DOI:
https://doi.org/10.31028/ji.v17.i2.45-55Keywords:
greenhouse, pakcoy, subsurface irrigation, water footprint, water levelAbstract
The problem of land conversion encourages the development of urban farming by utilizing narrow space. A subsurface irrigation system with applied evapotranspirative irrigation system was developed in this study as a solution in the development of urban farming, especially for easily cultivated horticultural crops such as Pakcoy (Brassica rapa L.). Water footprint is a method to evaluate the efficiency and effectiveness of irrigation water used. This study aims to analyze the value of the water footprint in Pakcoy cultivation with various scenarios of water level based on the principle of evapotranspirative irrigation, and to determine subsurface irrigation systems with optimal water levels. The research was conducted in the greenhouse of Kinjiro Farm, Gunung Batu, Bogor, West Java from March to May 2023. There were three treatments of the water level, i.e., Water Level 1 (TMA 1) with a water level of 13 cm depth, Water Level 2 (TMA 2) with a water level of 10 cm depth, and Water Level 3 (TMA 3) with a water level of 7 cm depth. The total plant water requirements of TMA 1, TMA 2, and TMA 3 were 38.79 L, 44.19 L, and 38.47 L respectively. Among the three treatments, TMA 2 is the best irrigation system because it has the lowest water footprint. The water footprint value at TMA 2 was 8% and 34% lower than that TMA 3 and TMA1, respectively. This developed technology can be easily operated without having to provide irrigation water every day and is feasible to be tested in urban areas.
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