Analisis Water Footprint pada Budidaya Pakcoy dengan Sistem Irigasi Bawah Permukaan Pocket Fertigation

Abstract

Keterbatasan ketersediaan air dan penurunan produktivitas tanaman sawi khususnya pakcoy menyebabkan diperlukannya teknologi irigasi tepat guna. Pocket fertigation merupakan pengembangan dari sistem irigasi cincin yang diharapkan dapat meningkatkan produktivitas tanaman dan air. Penelitian ini bertujuan menganalisis water footprint tanaman pakcoy menggunakan sistem irigasi pocket fertigation denganberbagai skenario, serta menentukan sistem irigasi yang paling optimal. Penelitian dilaksanakan pada bulan April-Juni 2022 bertempat di Kinjiro Farm, Kota Bogor. Tahapan penelitian meliputi persiapan lahan, pengumpulan data, pengolahan data, dananalisis water footprint. Rancangan skenario irigasi dipengaruhi faktor sistem irigasi pocket fertigation (P1) dan konvensional (P2), serta pemberian air satu kali evaporasi (A1) dan dua kali evaporasi (A2). Total water footprint pada skenario P1A1, P2A1, P1A2, dan P2A2 secara berturut-turut sebesar 251,72 m3/ton, 231,56 m3/ton, 296,18 m3/ton, dan 222,53 m3/ton dengan produktivitas air tertinggi terjadi pada skenario P2A1, sehingga diperlukan pengembangan pocket fertigation lebih lanjut untuk meminimalkan water footprint dan meningkatkan produktivitas air.

The limited availability of water and the decrease in the productivity of mustard plants, especially bok choy, have led to the need for appropriate irrigation technology. Pocket fertigation is the development of a ring irrigation system which is expected to increase crop and water productivity. This study aims to analyze the water footprint of bok choy plants using pocket fertigation irrigation system with various scenarios, and to determine the optimal irrigation system. The research was conducted in April-June 2022 at Kinjiro Farm, Bogor City. The research stages include land preparation, data collection, data processing, and water footprint analysis. The irrigation scenario design is influenced by the pocket fertigation (P1) and conventional irrigation systems (P2), as well as the provision of water one time evaporation (A1) and two times evaporation (A2). The total water footprint in the P1A1, P2A1, P1A2, and P2A2 scenarios, respectively, was 251,72 m3/ton, 231,56 m3/ton, 296,18 m3/ton, and 222,53 m3/ton with the highest water productivity occurs in the P2A1 scenario, so that further pocket fertigation is needed to minimize the water footprint and increase water productivity.