RANCANG BANGUN SISTEM FERTIGASI DENGAN MENGGUNAKAN VENTURIMETER

Abstract

Farmers in Indonesia have not yet applied fertigation technology using venturimeters which can facilitate the work of farmers to water and fertilize plants. This study aims to make a fertigation system tool using a venturimeter, determine the discharge from the system circuit, and the discharge of nutrient output and the ratio of dissolved nutrients. Fertilizer tool design using a PVC pipe and two parallel mounted venturimeters, with the size of one inch. The test was carried out with three variations of the vertical distance of the nutrient fluid to the venturimeter 44 cm, 52 cm and 79 cm. This fertigation tool functions to produce a series of irrigation systems 0.778 l / s with pressure on the main pipe M1 = 1.90 bar, pressure before passing venturi 0.9 bar (on M2 and M3), after veventuri 0.45 bar (on M4 and M5) and in the main pipe output M6 = 1.69 bar. Nutrient discharge was successively 5.19 ml / s, 4.31 ml / s and 2.13 ml / s, until the ratio of nutrition to irrigation water was obtained 0.67%, 0.55% and 0.27% (V / V) ). Nutrient ratio settings can be changed by adjusting the vertical suction distance between the liquid surface on the nutrient container with a venturimeter, the greater the nutrient suction distance, the smaller the ratio of nutrients to irrigation water.

Keywords

• fertigation
• fertilizer
• irrigation
• venturimeter