PEMANFAATAN SISTEM PEMANEN HUJAN UNTUK BUDIDAYA HORTIKULTURA TAHUNAN DI LAHAN KERING

Abstract Water availability in dry season become handicap in improving land utility for upland horticulture. The objective of the research was to study the application of rain water harvesting and drip irrigationsystem to irrigateperennial horticulture at upland A permanent rain water harvesting system of 2 m under soil surface was built, which collected rain from a 114 ni house-roof at a 36-cubic meter water bed From 522.7 mm rain depth during j 05 days could accumulated rain water of 59.6 rrr. Using a 4-m height of water reservoir, along dry season the drip irrigation was built to irrigate one hectare of land where 460 Durian (Duriozibethinus) were planted Soil dryness electronic indicatorwere set up along the site to indicate the water equirement.Finallyby applyingdrip irrigationcouldreducedthe wateruse from20 liters/plantin conventionalsystem to 11.5 liters/plant weeklyequivalentThisactivitycouldenhancedwaterdepth from280.2mm beforeirrigationto 369.1 mm up to 60 cm soil depth. The result show that this system can be applied at upland area, particularly for producing a high value of horticulture plants. Keywords: rain harvesting, upland, horticulture, drip irrigatio