APLIKASI LUBANG BIOPORI PADA LAHAN TANAMAN KELAPA SAWIT (ELAEIS GUINEENSIS JACQ) TERHADAP SIFAT FISIKA TANAH DI BALAI PENYULUHAN PERTANIAN (BPP) RANTAU SELATAN

LUTHFIYYAH ZALFA HARAHAP, NPM 2203100082 (2026) APLIKASI LUBANG BIOPORI PADA LAHAN TANAMAN KELAPA SAWIT (ELAEIS GUINEENSIS JACQ) TERHADAP SIFAT FISIKA TANAH DI BALAI PENYULUHAN PERTANIAN (BPP) RANTAU SELATAN. Skripsi thesis, Universitas Labuhanbatu.

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Abstract

Degradasi sifat fisika tanah, khususnya infiltrasi dan porositas, merupakan masalah umum pada lahan perkebunan kelapa sawit monokultur intensif. Penelitian ini bertujuan untuk menganalisis pengaruh aplikasi lubang resapan biopori (LRB) terhadap perbaikan sifat fisika tanah di bawah tajuk kelapa sawit. Penelitian dilaksanakan di kebun kelapa sawit milik BPP Rantau Selatan, Kabupaten Labuhanbatu, Sumatera Utara, dari April hingga September 2023. Rancangan percobaan menggunakan Rancangan Acak Kelompok (RAK) dengan satu faktor, yaitu kedalaman LRB, yang terdiri dari tiga level: tanpa LRB (kontrol), LRB 50 cm, dan LRB 80 cm. Masing-masing perlakuan diulang lima kali. Parameter yang diukur meliputi laju infiltrasi (cm/jam), kepadatan isi tanah (g/cm³), porositas total (%), kadar air tanah volumetrik (%), tekstur tanah (% pasir, debu, liat), dan stabilitas agregat tanah (mm). Data dianalisis menggunakan ANOVA pada α=5% dan dilanjutkan dengan uji Duncan. Hasil penelitian menunjukkan bahwa aplikasi LRB memberikan pengaruh yang signifikan terhadap semua parameter yang diukur kecuali tekstur tanah. LRB kedalaman 80 cm menghasilkan laju infiltrasi tertinggi (25,3 cm/jam), meningkat 312% dari kontrol (6,1 cm/jam). Perlakuan yang sama juga menurunkan kepadatan isi tanah menjadi 1,15 g/cm³, meningkatkan porositas total menjadi 56,7%, meningkatkan stabilitas agregat (MWD) menjadi 1,68 mm, dan menjaga kadar air tanah rata-rata 34,2%. Tekstur tanah tidak mengalami perubahan signifikan. Hasil ini membuktikan bahwa LRB, terutama pada kedalaman 80 cm, efektif memperbaiki sifat fisika tanah dengan meningkatkan porositas dan stabilitas agregat, mengurangi pemadatan, dan meningkatkan kapasitas penyimpanan air, sehingga berpotensi mendukung keberlanjutan agroekosistem kelapa sawit. Kata Kunci : Biopori, Kelapa Sawit, Sifat Fisika Tanah, Infiltrasi, Kepadatan Tanah, Porositas, Stabilitas Agregat ================================================================================================== The degradation of soil physical properties, particularly infiltration and porosity, is a common issue in intensive monoculture oil palm plantations. This study aimed to analyze the effect of biopore infiltration hole (BIH) application on the improvement of soil physical properties under oil palm canopies. The research was conducted in an oil palm plantation of the South Rantau Agricultural Extension Center, Labuhanbatu Regency, North Sumatra, from April to September 2023. The experimental design used a Randomized Complete Block Design (RCBD) with a single factor, namely BIH depth, consisting of three levels: no BIH (control), 50 cm BIH, and 80 cm BIH. Each treatment was replicated five times. The measured parameters included infiltration rate (cm/hour), bulk density (g/cm³), total porosity (%), volumetric soil water content (%), soil texture (% sand, silt, clay), and soil aggregate stability (mm). Data were analyzed using ANOVA at α=5% and continued with Duncan's test. The results showed that BIH application had a significant effect on all measured parameters except soil texture. The 80 cm BIH treatment yielded the highest infiltration rate (25.3 cm/hour), a 312% increase from the control (6.1 cm/hour). The same treatment also reduced bulk density to 1.15 g/cm³, increased total porosity to 56.7%, increased aggregate stability (MWD) to 1.68 mm, and maintained an average soil water content of 34.2%. Soil texture did not change significantly. These results prove that BIH, especially at a depth of 80 cm, is effective in improving soil physical properties by increasing porosity and aggregate stability, reducing compaction, and enhancing water storage capacity, thus potentially supporting the sustainability of oil palm agroecosystems. Keywords : Biopore, Oil Palm, Soil Physical Properties, Infiltration, Bulk Density, Porosity, Aggregate Stability

Item Type:	Thesis (Skripsi)
Uncontrolled Keywords:	Biopori, Kelapa Sawit, Sifat Fisika Tanah, Infiltrasi, Kepadatan Tanah, Porositas, Stabilitas Agregat ========================================= Biopore, Oil Palm, Soil Physical Properties, Infiltration, Bulk Density, Porosity, Aggregate Stability
Subjects:	S Agriculture > S Agriculture (General) S Agriculture > SB Plant culture
Divisions:	Fakultas Sains Dan Teknologi > Agroteknologi
Depositing User:	Unnamed user with email repository@ulb.ac.id
Date Deposited:	13 May 2026 09:15
Last Modified:	13 May 2026 09:15
URI:	http://repository.ulb.ac.id/id/eprint/2309

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