CD Tesis

Pencucian dan Serapan Hara Serta Pertumbuhan dan Produksi Kelapa Sawit (Elaeis guinensis Jacq.) pada Tanah Kambisol Distrik (Typic Dystrudepts) yang Diaplikasi Polyhalite dan KCl

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Oil palm is a plantation crop widely cultivated, including in Riau, and often grown on marginal lands such as Dystrudepts soils. The low nutrient content and limited water-holding capacity of Dystrudepts soils pose significant challenges. The use of Polyhalite fertilizer, which is slow-release and contains K, Ca, Mg, and S, is one potential solution. Due to the low potassium content in Polyhalite fertilizer and its slow-release properties, additional potassium supplementation is needed to meet the plant's requirements, such as through the use of KCl fertilizer. This study aims to determine the leaching rate, nutrient uptake, growth, and yield of oil palm when applying the compound fertilizers Polyhalite and KCl on Kambisol Distrik (Typic Dystrudepts.
The study consists of two experiments. Experiment I was conducted in the Plant Ecophysiology Laboratory and the Central Plantation Services Laboratory using a Completely Randomized Design (CRD) with two factors. Factor I comprised five levels: 100% Polyhalite, 75% Polyhalite + 25% KCl, 50% Polyhalite + 50% KCl, 25% Polyhalite + 75% KCl, and 100% KCl. Factor II included two levels: broadcast method and incorporation method. Parameters observed in Experiment I included fertilizer solubility and leaching rates of K, Ca, Mg, and S from the Polyhalite compound fertilizer and its combinations with KCl. Experiment II was conducted on smallholder plantations in Petapahan Village, Tapung Subdistrict, Riau, using a non-factorial CRD with five treatments: Control, 25% Polyhalite + 75% KCl, 50% Polyhalite + 50% KCl, 75% Polyhalite + 25% KCl, and 100% Polyhalite. Observed variables included soil chemical properties, leaf nutrient content, plant growth, and oil palm yield..
The results showed that 100% Polyhalite fertilizer exhibited slower solubility and lower leaching rates of K, Ca, Mg, and S. Fertilizer application using the incorporation method dissolved more quickly than the broadcast method but resulted in higher nutrient leaching rates. Applying 75% Polyhalite + 25% KCl improved soil chemical properties and increased Ca and Mg content in oil palm leaves. The application of 100% Polyhalite fertilizer enhanced plant height, trunk diameter, frond length, the number of leaflets, and increased fresh fruit bunch (FFB) weight by up to 15.75% per bunch.

Keywords : Oil Palm, Dystrudepts, Polyhalite, KCl, Leaching

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

2210247890

Penerbit

Pekanbaru : Universitas Riau – Pascasarjana – Tesis Ilmu Pertanian., 2025

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

2210247890

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

AGRONOMI

Info Detail Spesifik

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Pernyataan Tanggungjawab

Jaka

Versi lain/terkait

Lampiran Berkas

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