Penentuan Nilai Koefisien Tanaman dari Beberapa Spesies Tanaman Hortikultura pada Tanah Inceptisol dengan Pembenahan Kompos

Abstract

NURUL TRI RAHMADHANI: Determination of the value of plant coefficients of several species of horticultural plant on inceptisol soil by composting, supervised by SUMONO and DELIMA LAILAN SARI NASUTION. The magnitude of evapotranspiration value of plant can be determined based on the potential evaporation value and the plant coefficient for each species from its growth period. This research was aimed to determine the plant coefficient values of Pakcoy (Brassica rapa L.), Caisim (Brassica juncea L.), and Lettuce (Lactuca sativa L.) on Inceptisol soil with the addition of compost. The results showed that the soil texture of each planting medium was sandy loam, with the ranges of organic materials content of 6,25-5,89%, the ranges of porosity were 53,87-52,95%, moisture capacity for each plants (Pakcoy, Caisim, and Lettuce) were 46,46%, 44,31%, and 47,87%, dry weight of each plants (Pakcoy, Caisim, and Lettuce) were 75 gr, 85 gr, and 35 gr, and then the value of the plant coefficient for Pakcoy, Caisim and Lettuce in the middle period of growth (16-30 days) were 0,44; 0,60 and 0,50. As well as the value of the plant coefficient of Pakcoy, Caisim and Lettuce in the final phase of growth (31-45 days) were 0,30; 0,31 and 0,44.