Water footprint analysis on subsurface irrigation with pocket fertigation for melon cultivated in greenhouse
DOI:
https://doi.org/10.31028/ji.v16.i2.33-45Keywords:
evaporation, irrigation, melon, pocket fertigation, water footprintAbstract
The water footprint approach is an important thing in determining water consumption in producing a product. In agricultural production, irrigation systems are the main source of water for plants, especially in the greenhouses. This study aims to analyze the water footprint of an alternative irrigation system with pocket fertigation that adopts a subsurface irrigation system and compare it with conventional surface irrigation systems, especially for melons plants. The research was conducted in March – July 2022 at Kinjiro Farm, Bogor with 2 combinations of irrigation water and 2 irrigation systems. The treatments were pocket fertigation irrigation system with irrigation amount of evaporation (PF-E), pocket fertigation with irrigation of 2 times evaporation (PF-2E), conventional irrigation with irrigation equal to evaporation (SK-E) and conventional irrigation system with irrigation of 2 times evaporation (SK-2E). The results show that pocket fertigation has a water footprint of 40.6% lower than conventional irrigation systems. It was indicated pocket fertigation is more effective in water irrigation used. This is also supported by a higher water productivity value than conventional irrigation. The value of water productivity in the pocket fertigation system and the conventional system is 18.77 kg/m3 and 11.00 kg/m3, respectively. Among the treatments, PF-2E was the best treatment as more efficient to be applied to melon plants, because it has higher yields and water productivity, as well as a lowest water footprint compared to other irrigation systems.
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