Efektifitas Pengawetan Batang Kelapa Sawit (Elaeis guinensis Jacq.) Terhadap Serangan Rayap Tanah (Coptotermes curvignathus Holmgren) Menggunakan Campuran Boraks dan Asam Borat

Abstract

Oil palm trunk has a high moisture content about 60%-300% depended on the height and age of the tree and it was presumed to have low quality and prone to decay by organisms. It is necessary to improve the trunk quality using preservatives. The purpose of this study is to calculate the value of the penetration and retention, to test the durability of oil palm trunk from the attack of termites after treated with a mixed preservative of borax and boric acid. This study used the free of defects trunk obtained from PT. Buana Karya Bhakti in Tanah Bumbu, South Kalimantan, planted in 1998 (±18 years old). The research used two factors: A (the preservative concentration variations) = a1 (5%); a2 (10%); a3 (15%); and B (soaking time variation) = b1 (1 day); b2 (3 days); b3 (5 days). The results showed that the trunk water content was 14.62%, the density was 0.25 g/cm3, the radial shrinkage was 1.48% and the tangential shrinkage was 2.17%. The average of boron penetration was 50 mm. The highest retention was got from the treatment of boron concentration 15% in 2 days for 54.71 kg/m3, while the lowest retention was from 5% boron in 1-day treatment for 13.7 kg/m3. The weight loss ranged from 19.30%-41.32%, and the average of termites attack degree ranged between 40% and 70% (categorized as moderate), while the control was decayed completely by termites in both experiments. The mortality rate in all treatments was 100%, while the control ranged from 7%-10.5%.Keywords: oil palm trunk, preservation, boron, termites

Efektivitas Pengawetan Dengan Teknik Infus Dan Bandage Pada Pohon Balam Terhadap Serangan Rayap Kayu Kering

“…Uji efikasi dianggap berhasil apabila nilai mortalitas kayu kontrol tidak melebihi 55% dengan derajat proteksi 70 atau kurang (Barly, Lelana, & Ismanto, 2010;Barly, Ismanto, & Martono, 2011;Harsono, 2016). Pada pengujian ini nilai mortalitas; derajat serangan pada kayu kontrol adalah 86,8%; 70.…”

Pengaruh penambahan natrium tetra boraks untuk pengawetan limbah batang kelapa sawit

“…Setelah itu contoh uji ditimbang beratnya hingga konstan. Menurut (Harsono, 2016) kadar air kayu didapat dari perbandingan jumlah (berat) kayu kering udara dibandingkan berat kayu kering yang dinyatakan dalam persen (%) seperti persamaan 1.…”

“…Keteguhan lentur kayu adalah kemampuan kayu untuk melengkungkan diri ketika menahan tekanan dari atasnya. Menurut (Harsono, 2016), kuat lentur ialah kekuatan untuk menahan gaya-gaya yang berusaha melengkungkan kayu atau menahan beban mati maupun hidup, selain beban pukulan yang harus dipikul oleh kayu tersebut.…”