Penentuan Nilai Evapotranspirasi dan Koefisien Tanaman Kelapa Sawit Varietas Tenera (Elaeis Guinensis Jack.)

ABSTRAK

ADE RAHMI ALHAS: Penentuan Nilai Evapotranspirasi dan Koefisien
Tanaman Kelapa Sawit Varietas Tenera (Elaeis Guinensis Jack.), dibimbing oleh
SUMONO dan AINUN ROHANAH.
Mempertimbangkan adanya dugaan tanaman kelapa sawit banyak
mengkomsumsi air, perlu adanya kajian yang lebih mendalam khususnya terhadap
besarnya laju evapotraspirasi tanaman kelapa sawit dan pada tahap awal dapat
dimulai dari proses pembibitan. Besarnya nilai evapotranspirasi tanaman dapat
ditentukan berdasarkan nilai evaporasi potensial dan koefisien tanaman kelapa
sawit untuk setiap periode pertumbuhannya. Penelitian ini bertujuan untuk
menentukan nilai evapotranspirasi dan koefisien tanaman dengan menggunakan
bibit tanaman kelapa sawit varietas tenera pada umur 4 bulan.
Nilai evapotranspirasi tanaman kelapa sawit pada fase awal penelitian
atau usia tanaman 5 bulan sebesar 0,9 mm/hari dan fase akhir atau usia tanaman 6
bulan 0,98 mm/hari. Besarnya evaporasi pada fase awal penelitian yaitu 1,98
mm/hari dan fase akhir 1,93 mm/hari. Koefisien tanaman kelapa sawit yang
diperoleh pada fase awal penelitian yaitu 0,47 dan fase akhir 0,5.
Kata kunci : Evapotranspirasi, Koefisien Tanaman, Evaporasi Potensial, Tanaman
Kelapa Sawit
ABSTRACT

ADE RAHMI ALHAS : Determination of Value of Evapotranspiration and Plant
coefficient of oil palm (tenera Variety) (Elaies guenensis Jack) supervised by
SUMONO and AINUN ROHANAH.
Considering that the oil palm plants consume a lot of water, the need for
more in depth assessment of the magnitude of the rate of evapotraspiration
especially oil palm plantations, and in the early stages the process can begin from
nursery. The value of crop evapotranspiration can be determined based on the
value of potential evaporation and oil palm crop coefficients for each period of
growth. This study was aimed to determine the value of evapotranspiration and
crop coefficients using tenera seeds at the age of 4 months.
Evapotranspiration value of oil palm plantations in the early phase of
plant research or 5 months of age was 0.9 mm/day and the final phase of the plant
or the age of 6 months was 0.98 mm/day. The amount of evaporation in the initial
phase of the study was 1.98 mm/day and in the final phase was 1.93 mm/day. Oil
palm crop coefficient obtained in the initial phase of the study was 0.47 and in the
final phase was 0.5.
Keywords : Evapotranspiration, Crop coefficient, potential evaporation, oil palm
Plant

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Universitas Sumatera Utara