IDENTIFIKASI JENIS CACAT KAYU BULAT JATI (Tectona grandis Linn. F.) PADA AREAL PEMANENAN DI KPH JEMBER

Abstract

Teak trees are high-quality plants.The activity of harvesting teak doesn’t always produce good quality or without defects found.Various types of defects will reduce the quality and selling value of wood.The purpose of this research was to identify and measure the defects of teak roundwood (Tectona grandis) in the harvesting area in KPH Jember. Knowing the type and quantity of defects is expected to be a reference for companies, especially Perum Perhutani, KPH Jember on process of maintaining teak trees during harvesting, get better results and higher value results. The method that was used in this research was quantitative descriptive research and go to the research site.Sampling is done bypurposive sampling. The research was conducted in March - April 2018. The results of the identification of teak defects (Tectona grandis Linn.F.) found 23 types of defects that was form defects , body defects, or bontos defects. The type of defect found is straightness, cylindrical, backwardness, groove defects, direction of fiber defects, inger-inger, buncak-buncak, hole gerek, broken defects, hole in the body, wood eye, lump defects, lengar defects, broken up defects, slemper defects, bontos defects, fragile terrace, rotten terrace, hole defects, gubal defects, pakah defects, gabeng defects, dan kunus defects. The most defects were the type of buncak-buncak light as 89 trees (98.89%) and 566 sortiment (56.39%) that having defects, while the least defect were type of big hole gerek as 2 trees (2.22%) and 3 sortiment (0.30%) that having defects.Keywords : defect, harvesting, identification, perhutani, teak.

Suitability of Teak Log Quality from Gunung Kidul and Bantul Yogyakarta Community Forest for Export Meubel Purpose

“…Regular maintenance, particularly pruning, results in a straighter log. Defects in community forest logs can be reduced by improving plant management, resulting in higher-quality teak wood for furniture raw materials [8], [15], [19]. The types and quantities of defects need to be measured to know the potential for quality degradation due to natural defects produced.…”

“…This is because the trend of stem growth at the age of 6, 8, and 10 years tends to be the same. The quality of round teak wood can determine the direction of further use [8]. Various types of defects will reduce the quality and selling value of the wood, minimal defects will result in higher quality and worthy teak wood.…”

“…Various types of defects will reduce the quality and selling value of the wood, minimal defects will result in higher quality and worthy teak wood. Knowing the type and number of defects logs, can be used as a reference for the community in teak forest management [8]. The results of this study indicate that the quality of 6-year-old logs with an average diameter of 16.51 cm is classified in the quality of small logs/KBK (AI) and the third quality class (T) with straightness defects of two lengths of 3% according to [18].…”

“…Brittleness defects are brittle wood deformities that can be found in the bottom of the wood. Teak defects can reduce by proper plant maintenance [8], [18]- [19]. Teak plants growth qualities can be influenced by silviculture practices such as spacing, fertilization, and pruning.…”

“…Straightness, brittleness defects, sapwood defects, wood knot defects, liver rot, and other, are type of natural defects that commonly found in teak from community forest [15]- [16]. The quality of logs as raw materials for export furniture is determined by defects in straightness, brittleness, sapwood defects, and wood knot defects [8], [15]- [16]. It is very important to classify quality teak wood community forest based on straightness defects, brittleness defects, sapwood defects, and wood knot defect in various locations [17].…”