Redistribution of Rainfall Water in The Root Zones of Mature Oil Palm Growing on Different Slope Steepness

Hermawan, Bandi and Herawati, Reny and Alnopri, Alnopri and Gonggo M, Bambang (2018) Redistribution of Rainfall Water in The Root Zones of Mature Oil Palm Growing on Different Slope Steepness. In: International Conference-Sustainable Agriculture, Food and Energy (SAFE2019), 19-21 Oktober 2018, Manila, Phillipine. (Unpublished)

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Abstract

Abstract— The slope steepnes affects the amount of rainfall water inflitrating the soil surface , the availability of soil water in the root zones, as well as the growth and production of the plant. This study aimed to compare redistribution patterns of rainfall water in the soil profile under mature oil palm trees growing on two contrasting slope steepness. Two mature oil palm trees were chosen as the plant samples growing on the 0 and 15 percent land steepness, respectively. A couple of probes, in which the lowest 2.5 cm part was uncovered enabling the copper materials to make contacts with the soil, was inserted into the soil to the depths of 2.5, 5.0, 7.5, 10.0, 12.5, 15.0, 17.5 and 20 cm, at the distance of 1, 2 and 3 m from the tree. Daily soil water contents were measured using a dielectrometer device after a heavy rainfall event to allow the temporally vertical distribution patterns rainfall water in the soil profil. Results showed that the profile distribution patterns of soil water contents following heavy rains varied significantly according to the slope steepness and the distance from the tree. The findings from the current study suggested that the faster-drying rates at the 20 cm soil layers on the steeper slope could be the reason for the low production of oil palm grown on the steep land. Keywords— dielectrometer; oil palm; rainfall water; redistribution.

Item Type: Conference or Workshop Item (Paper)
Subjects: S Agriculture > S Agriculture (General)
Divisions: Faculty of Agriculture > Department of Soil Science
Depositing User: Mr. Bandi Hermawan
Date Deposited: 02 Jun 2020 09:51
Last Modified: 02 Jun 2020 09:51
URI: http://repository.unib.ac.id/id/eprint/21181

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