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PENGARUH DIAMETER BATANG DAN STIMULAN ORGANIK TERHADAP PRODUKTIVITAS GETAH KARET (Hevea brisilliensis Muell. Arg) DI PT INDOCO SENDANG TULUNGAGUNG Suci Nur Fauziah; Galit Gatut Prakosa; Sukadaryati; Febri Arif Cahyo Wibowo
Jurnal Penelitian Hasil Hutan Vol. 40 No. 2 (2022): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2022.40.2.74%E2%80%9380

Abstract

Rubber (Hevea brasiliense Muell. Agr) is a highly traded commodity various industries. Indonesia is the second-largest rubberproducing country in Southeast Asia after Thailand, with most of the land owned by the people where farmers haven’t used renewabletechnology. This study conducted trials of wood vinegar stimulant and organic ethrel stimulant on various diameter classes to knowthe effect of latex productivity. The research was conducted for two months in July-August 2021 at PT Indoco Sendang Tulungagungplot Y, Picisan Village, Boso Hamlet. The variable observed was the weight of the rubber latex in each treatment. There are twotreatment factors, factor A stimulant consist of 4 levels: no treatment (A1), ethrel stimulant (A2), 100% wood vinegar stimulant(A3), 50% wood vinegar stimulant (A4). Factor B stem diameter consists of 3 levels: 10-15 (B1), 16-20 (B2), 21-25 (B3).The method used is a Randomized Block Design (RAK), Honest Significant Difference Test (BNJ) α 5%. There are threereplications with 36 samples. The concentration that has an influence on the weight of the sap is 100% wood vinegar stimulant.
KINERJA MESIN PENGERING MIKRO BERTENAGA KOMBINASI SURYA DAN LISTRIK DALAM PENGERINGAN KAYU JATI Galit Gatut Prakosa; Ramli Ramadhan
Jurnal Penelitian Hasil Hutan Vol. 39 No. 3 (2021): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2021.39.3.129-137

Abstract

Indonesia is one of the exporting countries for wood crafts to 193 countries, but in the process, it often suffers losses due toproduct returns by the buyer due to cracked defects when the goods arrive at the ordering country. One of the efforts to improve thequality of wood crafts is to dry the wood according to the destination country so that the dimensions and humidity are relativelystable. The industrial-scale wood drying process requires a high investment, so developing a small-scale dryer for artisans is necessary.This study aims to design and test the performance of a simple wood dryer with a capacity of 1.5 m³ at an affordable cost, easy tooperate and use by the public. The test samples used were stems and branches of teak (Tectona grandis L.f.). The heater used isa combination of solar heat and electricity, namely the heat of the sun is maintained and flowed into the wood drying chamberthrough a fan that sucks hot air from the combustion chamber into the drying chamber. Hot air is circulated to the inlet againcontinuously to be redistributed to the drying chamber. The test results show that the daily average temperature of solar heat receivedby the drying chamber is between 40−50°C, while the temperature for drying teak wood is between 45−70°C. From the evaluationthat has been done, the heating plate is less effective in heating the space, so it is necessary to replace it with a modification of theinstallation of the heating element on battery powered devices.