http://repository.ipb.ac.id/handle/123456789/54 2026-07-01T12:00:32Z http://repository.ipb.ac.id/handle/123456789/173848 Growth Rate Of Red Jabon And Teak Trees From Plantation Forest Wahyudi, Imam; Rahayu, Istie Sekartining; Mpape, Bahidin Red jabon (Anthocephallus macrophyllus Roxb. Havil) and teak (Tectona grandis Linn. f) is fast- and slow-growing tree species that are widely planted in Indonesia. Both species have high adaptability to grow in various types of soils. The development of red jabon and teak plantation forests and the utilization of their wood produced require knowledge of their growth rates. The information on the growth rate is important because it is closely related to forest sustainability. Climatic elements such as rainfall, rainy day, temperature, humidity, and duration of irradiation are important factors in tree growth. The purpose of this study was to study the growth rate i.e. the annual increment of red jabon and teak trees and their relationship with climatic elements. Observations were made for one year, namely 2021. This study used descriptive analysis to describe the growth rate; while Pearson's correlation was used to evaluate the relationship between the growth rate and climate elements. The results showed that the diameter increment of the red jabon tree per year was 2.21 cm, while for teak was 0.34 cm per year. A significant relationship between the growth rate of the jabon tree and climatic elements can be seen in rainfall, rainy days, and humidity; while temperature and duration of irradiation did not have a significant correlation. In teak trees, a significant relationship was seen only on a rainy day and humidity; while rainfall, temperature and irradiation time are not significantly correlated. 2026-06-01T00:00:00Z http://repository.ipb.ac.id/handle/123456789/173847 Persamaan Dan Perbedaan Ciri Anatomi Pada Beberapa Jenis Kayu Mangrove Wahyudi, Imam The rise of illegal logging activities is triggered by weak existing law enforcement processes. In court, the identity of the evidence is a very important factor and determining the wood species must be done correctly. This research aims to analyze the distinguishing characteristics of several mangrove wood species based on their anatomical structure. Macroscopic features of wood are observed directly by using a micro lup connected to a computer; while the microscopic ones namely the shape and size, and organization of wood constituent cells namely vessel (pores), axial parenchyma, rays, fibers and intercellular canals were observed through microtome specimens using a light microscope. The results showed that included phloem and crystals, the arrangement of pores, and type of parenchyma cell can be used to differentiate among the wood species studied. 2026-06-01T00:00:00Z http://repository.ipb.ac.id/handle/123456789/173846 Characteristics Of Aerogel Made From Balsa And Pulai Wood Wahyudi, Imam Red jabon (Anthocephallus macrophyllus Roxb. Havil) and teak (Tectona grandis Linn. f) is fast- and slow-growing tree species that are widely planted in Indonesia. Both species have high adaptability to grow in various types of soils. The development of red jabon and teak plantation forests and the utilization of their wood produced require knowledge of their growth rates. The information on the growth rate is important because it is closely related to forest sustainability. Climatic elements such as rainfall, rainy day, temperature, humidity, and duration of irradiation are important factors in tree growth. The purpose of this study was to study the growth rate i.e. the annual increment of red jabon and teak trees and their relationship with climatic elements. Observations were made for one year, namely 2021. This study used descriptive analysis to describe the growth rate; while Pearson's correlation was used to evaluate the relationship between the growth rate and climate elements. The results showed that the diameter increment of the red jabon tree per year was 2.21 cm, while for teak was 0.34 cm per year. A significant relationship between the growth rate of the jabon tree and climatic elements can be seen in rainfall, rainy days, and humidity; while temperature and duration of irradiation did not have a significant correlation. In teak trees, a significant relationship was seen only on a rainy day and humidity; while rainfall, temperature and irradiation time are not significantly correlated. 2026-06-01T00:00:00Z http://repository.ipb.ac.id/handle/123456789/173782 Beberapa Sifat Fisis-Mekanis Kayu Mangium Hasil Budidaya Umur Lima Tahun Wahyudi, Imam Kebutuhan kayu yang terus meningkat mengakibatkan kegiatan pembangunan hutan dengan berbagai skema semakin banyak diminati. Salah satu jenis pohon yang banyak ditanam masyarakat di lahan milik adalah mangium (Acacia mangium). Dalam rangka membantu dan mendukung kegiatan tersebut, kajian tentang sifat fisis-mekanis kayu yang dihasilkan perlu dilakukan untuk mengevaluasi perlakuan yang diterapkan. Sampel yang digunakan adalah kayu mangium dari tegakan yang berumur 5 tahun yang ditanam di satu lokasi milik petani, yang terdiri dari F0 (indukan), F1 (turunan pertama) dan F2 (turunan kedua). Sifat fisis-mekanis yang diuji meliputi kerapatan dan berat jenis serta keteguhan lentur statis (MOE dan MOR), keteguhan tekan sejajar serat dan kekerasan sisi dalam kondisi kering udara. Prosedur pengujian mengikuti British Standard 373-57. Data yang diperoleh kemudian dianalisis statistik dengan one-way Anova. Hasil penelitian menunjukkan sifat fisis-mekanis ketiga generasi kayu mangium tersebut (F0, F1 dan F2) tidak berbeda nyata. Ketiganya masuk ke dalam golongan kayu dengan kelas kuat III. 2026-06-01T00:00:00Z