Abstract
This research aims to design irrigation systems an NFT hydroponic with various gutters slope on pakcoy plants (Brassica rapa L.). This research was conducted in October 2020 to March 2021 at greenhouse of Agricultural Engineering Study Program, Department of Agricultural Technology, Faculty of Agriculture, Sriwijaya University. This research method used observation method. The observed paramaters were plant water need, the uniformity of irrigation water, the uniformity of electrical conductivity, and the uniformity of water flow the thickness and the production of pakcoy plants at NFT using slope of gutters 4%, 6%, and 8%. The results shown that the highest average value of irrigation water uniformity at a gutter slope of 8% was 93.44%. The highest average value of electrical conductivity uniformity of gutters at 8% slope was 99.45%. The highest average value of water thickness uniformity in the three guttering treatment at 8% gutter slope was 89.91%. The weight of crop production at a slope 8% was 3,184 g roots and 2,189 g of plants without roots. Plant water needs in the initial period of growth was 2.43 mm/day, the middle period of growth was 3.42 mm/day, and the final period of growth was 4.95 mm/day.
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