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All Journal AGRIVITA, Journal of Agricultural Science SAINS TANAH - Journal of Soil Science and Agroclimatology
Farrasati, Rana
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Agriculture, Biological Sciences & Forestry Education

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The Quantitative Analysis of Weather and Soil Moisture Role on Daily Transpiration Dynamics of Oil Palm Varieties (Elaeis guineensis Jacq.) Pradiko, Iput; Thirafi, Dhaffa Agung; Putra, Eka Tarwaca Susila; Sumaryanto, Sumaryanto; Syarovy, Muhdan; Darlan, Nuzul Hijri; Sujadi, Sujadi; Hutagalung, St Novella Angelica; Farrasati, Rana; Syarif, Afiya Nadhifah
AGRIVITA Journal of Agricultural Science Vol 48, No 1 (2026)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v48i1.4713

Abstract

The purpose of the study is to estimate and determine the in-situ transpiration dynamics of three oil palm varieties, which include DxP Langkat, DyP Dumpy, and DxP PPKS 540, using the Ratio Method (HRM) to measure real-time sap flow (SF). Field observations in Adolina, North Sumatra, were conducted in September, October, and December 2023 to collect data on macro- and microweather and soil moisture at varying distances from sample trees. Vapor pressure deficit (VPD) and solar radiation (QS) were among the key environmental factors that had strong associations with SF. Up to 82.24% of SF variability was explained by VPD and QS. DxP PPKS 540 recorded the highest transpiration rate of 1.70 mm/day because it had a higher leaf area (9.00 m2), and a bigger petiole cross-section (52.50 cm2). DxP Langkat, on the other hand, had the lowest transpiration rate at 1.49 mm/day. The results indicated the significance of VPD and QS in controlling sap flow and suggested that transpiration varied among varieties. This study provides an understanding of the physiological variation among oil palm varieties and a basis for future use in determining genotypes with increased drought resistance and adaptability to enhance resilience in new climatic conditions.
Estimation of water use efficiency (WUE) for efficient irrigation level of oil palm during the main nursery phase Pradiko, Iput; Farrasati, Rana; Darlan, Nuzul Hijri; Sumaryanto, Sumaryanto; Thirafi, Dhaffa Agung
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 22, No 1 (2025): June
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/stjssa.v22i1.93336

Abstract

The water requirement of oil palm depends on the growth phase (e.g., higher demand during vegetative expansion), environmental conditions (e.g., increased under high vapour pressure deficit), and agricultural practices (e.g., reduced demand through effective water management). Therefore, the water used for oil palm nurseries should be used efficiently to preserve environmental sustainability. The main objective of this research was to determine the water use efficiency (WUE) of oil palm during the main nursery phase. The study evaluated several irrigation strategies inside and outside the greenhouse, including fixed daily watering (two liters per seedling), irrigation based on actual evapotranspiration (ETa), rainfall-dependent watering, and no irrigation. In the outdoor treatments, one group of seedlings was irrigated according to ETa, but watering was withheld when daily rainfall exceeded five mm, while another group received two liters per day only when rainfall was below five mm.  These two treatments showed the highest daily evapotranspiration rates, greater vegetative growth, and higher biomass accumulation compared to the other treatments. Notably, the ETa-based treatment was recorded as having the highest water use efficiency (WUE). This study concludes that water loss during evapotranspiration is the main determining factor for irrigation volume. Therefore, irrigation in oil palm nurseries should be based on ETa to improve efficiency and lower costs. These findings offer practical guidance for farmers or plantation management to support more sustainable and cost-effective irrigation practices.
Co-Authors Eka Tarwaca Susila Putra Hutagalung, St Novella Angelica Muhdan Syarovy Nuzul Hijri Darlan Pradiko, Iput Sujadi Sujadi Sumaryanto Sumaryanto, Sumaryanto Syarif, Afiya Nadhifah Thirafi, Dhaffa Agung