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Edy Sigit Sutarta
Pusat Penelitian Kelapa Sawit
Agriculture, Biological Sciences & Forestry

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PEMANFAATAN BAKTERI ENDOFIT UNTUK MENINGKATKAN KERAGAAN BIBIT KELAPA SAWIT (Elaeis guineensis Jacq.) Fandi Hidayat; Suroso Rahutomo; Rana Farrasati; Iput Pradiko; Muhdan Syarovy; Edy Sigit Sutarta; Wiwik Eko Widayati
Jurnal Penelitian Kelapa Sawit Vol 26 No 2 (2018): Jurnal Penelitian Kelapa Sawit
Publisher : Pusat Penelitian Kelapa Sawit

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (908.806 KB) | DOI: 10.22302/iopri.jur.jpks.v26i2.36

Abstract

Endophyte bacteria are microorganisms that live within plant tissue, harmless to the host plants, and usually contribute to plant health. Some of the endophytes are proved to be able to enhance plant growth by nitrogen fixation, phytohormones production such as indole acetic acid (IAA) and cytokines. This study aims to observe the influence of endophytic bacteria on the oil palm seedlings growth, nutrient absorption, and its potential on reducing the use of chemical fertilizer. The study was carried out in oil palm nursery at Aek Pancur substation since 3-monthsold until 9-monthsold. Treatments were arranged by using randomized completely block design (RCBD) with six treatments and repeated four times. The treatments are: (1) control; (2) 100% chemical fertilizer (standard); (3) 25% of urea dosage + inoculation of endophyte bacteria (B1N25); (4) 50% of urea dosage + inoculation of endophyte bacteria (B1N50); (5) 75% of urea dosage + inoculation of endophyte bacteria (B1N75); and (6) 100% of urea dosage + inoculation of endophyte bacteria (B1N100). The result showed that B1N75 was the best treatment indicated by higher relative agronomy effectiveness (RAE) up to 5.5% compared to standard. On the other hand, its growth and biomass production were also equal to standard treatment. It means that application of endophyte bacteria could reduce the use of inorganic nitrogen fertilizer (Urea) up to 25%.
EFISIENSI SERAPAN HARA BEBERAPA JENIS PUPUK PADA BIBIT KELAPA SAWIT Eko Noviandi Ginting; Suroso Rahutomo; Edy Sigit Sutarta
Jurnal Penelitian Kelapa Sawit Vol 26 No 2 (2018): Jurnal Penelitian Kelapa Sawit
Publisher : Pusat Penelitian Kelapa Sawit

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1556.922 KB) | DOI: 10.22302/iopri.jur.jpks.v26i2.38

Abstract

Fertilizer efficiency is a ratio between the amount of nutrient that absorbed by the plant and the amount of nutrient that applied through fertilizer. The efficiency of a fertilizer can be defined as the number of nutrients that can be absorbed by the plan. The objective of this study was to compare the efficiency of three types of fertilizers on the oil palm seedling. This research was conducted on Indonesian Oil Palm Research Institute at Medan, North Sumatra, Indonesia. Four treatments with three replications were arranged by a completely randomized design. The treatments are: 1) P0 = control/no fertilizer; 2) P1 = Briquette compound fertilizer, 3) P2 = Granular compound fertilizer, and 4) P3 = single-nutrient fertilizer; Urea, TSP, MoP, and Kieserite. The results showed that (I) nutrients uptake (NU) of N, P, K, and Mg on briquette compound fertilizer relatively higher about 11%; 21%; 9%; and 23% compare to granular compound fertilizer and 5%; 1%; 1% and 19% higher than P3 respectively; (ii) recovery efficiency (RE) of N, P, K, and Mg on briquette compound fertilizer were 18%; 42%; 16%; and 20% higher than granular compound fertilizer and 8%; 1%; 2%; and 19% than single-nutrient fertilizer; while (iii) agronomic efficiency (AE) of N, P, K, and Mg on Briquette compound fertilizer were higher about 26% (for each nutrient) compare to Granular compound fertilizer and 18% higher (for each nutrient) than single-nutrient fertilizer.
Kesuburan Tanah, Pertumbuhan dan Produktivitas Tanaman Kelapa Sawit (Elaeis guineensis) pada Tiga Kedalaman Mineral Pirit Edy Sigit Sutarta; Dhimas Wiratmoko; Erwin Nyak Akoeb
Jurnal Penelitian Kelapa Sawit Vol 28 No 2 (2020): Jurnal Penelitian Kelapa Sawit
Publisher : Pusat Penelitian Kelapa Sawit

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/iopri.jur.jpks.v28i2.104

Abstract

Acid sulfidic land is one of the marginal land that has been used for oil palm development. Low soil acidity (pH) and high content of Al and Fe are limiting factors for oil palm development in this area. Oil palm yield in this area was very limited and could not reach the standard of oil palm productivity in mineral soils. The objectives of this study were mapping the pyritic depth distribution, and observing the soil fertility on three pyritic depth (40 – 60 cm, 60 - 90 cm, and >90 cm). The results of this study showed that Paya Rambe plantation had varied pyritic depths, between 40-110 cm. The shallow pyritic depth was found along the river to the sea estuary. Shallow pyritic depth soil has lower soil fertility than the deeper one. Soil with shallow pyritic layer has high acidity, Fe, S, and Al contents, also contain low macro nutrients (N, P, K, and Mg) availability. Furthermore, shallow pyritic depth reduced the oil palm growth, nutrients uptake and oil palm productivity.
Co-Authors Dhimas Wiratmoko Eko Noviandi Ginting Erwin Nyak Akoeb Fandi Hidayat Iput Pradiko Muhdan Syarovy Rana Farrasati Suroso Rahutomo Wiwik Eko Widayati