摘要：Intara YI, Nusantara AD, Supanjani, Caniago Z, Ekawita R. 2019. Spatial patterns of evapotranspiration distribution in palm
oil plantation. Nusantara Bioscience 11: 1-7. Evapotranspiration can directly calculate by some climatic factors which are processed in
the form of simulation modeling of two-dimensional evaporation distribution on specified coordinates. This research had been
conducted in palm oil plantation PT. Bio Nusantara Bengkulu, Indonesia. The sampling location covered some areas named as TM2,
TM22, Palm oil-Field, Palm oil-Residential Area and Palm oil-Secondary Forest. The TM2 and TM22 were a location of palm oil
plantation used for 2 and 22 years planting respectively. The three remaining locations dedicated to areas of which mix TM22 with
soccer Field, Residential Area and Secondary Forest. The results showed that in palm oil plantation TM 2 which consisted of herbaceous
plants and bushes produced more water vapor. At palm oil plantation TM 22 which had fully developed canopy or the entire soil area
had been covered by canopy, so only transpiration occurred at this site, less water vapor was produced. This is due to the temperature
condition is inversely proportional to the relative humidity. As a comparison of a palm oil plantation evapotranspiration measurement
result, indicated on area of football field where only has grass in the field, with low intensity of light, wind, and humidity, affected
directly to high amount of evapotranspiration, therefore, more water vapor produced. The measurement result of palm oil plantation
nearby residential area showed that the area which consisted of herbaceous plants and bushes, also zinc-roofed residential with the
intensity of light and wind directly hit the area, produced less water vapor. Moreover, the condition at the border area between TM 22
and the palm oil secondary forest contained mixed plantation. The measurement result showed that the palm oil secondary forest had the
same height of canopy and almost had equal humidity (>76%), but secondary forest plants had more dense plantation density which
produced less water vapor.
关键词：Canopy; evapotranspiration; humidity; palm oil; spatial distribution
