Neolamarckia cadamba Neolamarckia cadamba Jabon merupakan salah satu jenis pohon cepat tumbuh, sehingga jabon sangat diminati untuk dikembangkan di hutan rakyat dan hutan tanaman industri. Namun, pertumbuhan yang optimal akan tercapai jika pemahaman tentang teknik silvikultur seperti manajemen hara di tapak sangat dibutuhkan. Selain itu, luas lahan milik yang diperuntukkan untuk membangun hutan rakyat tidak terlalu luas, sementara kebutuhan untuk budidaya tanaman hortikultura juga penting. Untuk itu penelitian ini dirancang untuk mempelajari laju pertumbuhan jabon pada scenario pengelolaan antara manajemen hara dan pemanfaatan lahan antara untuk meningkatkan nilai ekonomi lahan.Penelitian ini bertujuan untuk melihat beda pertumbuhan awal jabon pada variasi manajemen lahan dan manajemen hara yang berbeda terutama pemupukan dan pola agroforestry yang dikembangkan. Metode yang digunakan adalah rancangan acak lengkap, dimana perlakuan yang dilakukan adalah penanaman jabon dengan diberi pupuk kompos, jabon ditanam dengan pola agroforestry dan tidak diberi pupuk kompos serta jabon ditanam dengan pola agroforestry dan diberi pupuk kompos.Hasil penelitian menunjukkan bahwa pertumbuhan diameter jabon terbaik bila jabon ditanam dengan pola agroforestry dan tidak diberi pupuk kompos maupun jabon ditanam dengan pola agroforestry dan diberi pupuk kompos.Sementara perlakuan terbaik untuk pertumbuhan tinggi jabon adalah jabon ditanam dengan pola agroforestry dan diberi pupuk kompos.
Illegal logging and encroachment are the main drivers of deforestation in Lombok Island. However, recent increases in the frequency of floods and landslides has enhanced local awareness of ecosystem restoration. This study confirms that community participation is an important factor for protecting forests, among others through involvement in ecotourism activities at Gunung Rinjani National Park and participation in agroforestry program in the park’s buffer zone. Since 2010, Community Forestry Program in Central Lombok has been integrated with a scheme of reducing emission from deforestation and forest degradation (REDD). Although Community Forestry has been successfully implemented in several areas of production forests and protection forests, this scheme is a newly introduced government policy for reforming the management of conservation areas in Indonesia. Through this scheme, local communities have a bundle of rights to manage a parcel of forestland around Gunung Rinjani National Park. In addition to giving access to manage forestland, this scheme also supports the empowerment of local communities to manage forests in more sustainable ways, e.g. through the utilization of non-timber forest products, the cultivation of crops on land under the forest stand, and the rehabilitation of degraded forest lands. This study investigates the trajectories of deforestation, identifies direct and underlying causes of deforestation, and describes the role of Community Forestry to reduce deforestation in Central Lombok.
Informations on the individual growth of bamboo stems such as dimensions of node length, node diameter, and wall-node thick are needed to increase bamboo processed yield. This study aimed to provide a model of growth estimation of individual growth of bamboo stems. Destruction method was used, and resulting data was sorted sorted by time. The correlation between age and dimensions was analyzed with cross-section technique. The results showed that there were a correlation among age with node diameter and node length, but no correlation with wall-node thick. Parameters of node length, total length of bamboo, and base node diameter significantly influenced the estimated diameter of each node. Node's sequence number, node lengths, and base node diameter can be used to compile estimation model of the bamboo wall thickness. The uniqueness of bamboo model is the importance of node sequence.. This model can be used for sustainable development use of Dendrocalamus asper.
Pertumbuhan perkebunan kelapa sawit untuk produksi minyak semakin meningkat. Lebih dari 5 juta hektar kebun kelapa sawit yang ada di Indonesia dengan produksi minyak sawit mencapai 14 juta ton. Potensi kebun tersebut menyimpan limbah tandan buah kosong (EFB) yang sangat tinggi yang dapat dimanfaatkan sebagai bahan alternatif menghasilkan pulp, kerajinan, plastik dan dengan teknologi Chlorin Bleaching Free pada EFB dapat dihasilkan kertas dengan tingkat keputihan mencapai 75 -80%. Limbah EFB memiliki kaitan yang erat dengan umur. Biomassa EFB mencapai 10,27 ton/ha dan bila dimanfaatkan untuk produksi pulp dapat menghasilkan 28 USD/Ha. Peningkatan nilai ekonomi dapat mengendalikan konversi lahan berhutan untuk pembangunan perkebunan kelapa sawit. ABSTRACT
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