Efisiensi Penggunaan Air Pada Sistem Irigasi Tetes dan Curah Untuk Tanaman Krisan (Chrysantemum sp)

Abstract

Chrysant plants (Chrysantemum, sp.) as a horticulture vegetation has an estetical and economical value. Irrigation system which is used for Chrysant plants in PT Tecsuco Nusasemesta's green house are sprinkle and trickle irrigations. The water supply has to be equal with the water consumption of the plants in order to get higher water use efficiency. This research tries to calculate water use efficiency of trickle and sprinkler irrigation and its irrigation cost for chrysant plants. Water economical value is higher than before, so water consumption as one of production factor have to be planned in order to get proper benefit for every comodity. One of the methods to get the higher efficiency of water use is irrigation scheduling. The research result shows that the evapotranspiration of chrysant plants in the late-stage is bigger than in the initial- stage but lower than in the midstage. The efficiency of sprinkler irrigation is 68.86 % but the trikle irrigation efficiency is only 46.80 %, due to the irregularity of the irrigation schedule. As the result, the chrysant production is not good and there. is a deficit in the operation cost. Keywords: chrysant, sprinkle irrigation, trickle irrigation, water use o e!ftciency, green house.