Electronic Theses and Dissertation

Kebun Benih Semai (KBS) Sengon Wamena (Falcataria falcata) di Hutan Kemasyarakatan (HKm) Alue Seumantok berfungsi dalam menyediakan benih semai berkualitas tinggi untuk mendukung keberlanjutan hutan rakyat. Varietas Wamena dipilih karena keunggulan ketahanan genetiknya terhadap penyakit karat tumor, namun pemindahan ekosistem baru perlu dilakukan pemantauan intensif guna memastikan keberhasilan adaptasinya. Penelitian ini bertujuan untuk menganalisis indeks kerusakan pohon (TLI), mengevaluasi penampakan tajuk (VCR), serta menentukan status kesehatan akhir dari tegakan tersebut. Pengambilan data lapangan dilakukan menggunakan metode Forest Health Monitoring (FHM) pada empat petak ukur (Petak 2, 8, 12, dan 13) dengan total sampel pengamatan sebanyak 683 pohon.
Hasil analisis vitalitas berdasarkan nilai TLI menunjukkan mayoritas tegakan Sengon Wamena berada dalam kondisi yang sehat, di mana sebanyak 621 pohon (91%) dikategorikan sehat, 60 pohon (9%) mengalami kerusakan ringan, dan masing-masing 1 pohon mengalami kerusakan sedang serta berat di Petak 12. Beberapa variasi tipe kerusakan yang diidentifikasi meliputi mati pucuk (dieback), perubahan warna daun, luka terbuka, cabang patah, sarang rayap, kanker batang, gummosis, dan gangguan liana. Sebaliknya, kondisi tajuk (VCR) menunjukkan hasil yang cukup kontras karena didominasi oleh kategori rendah sebanyak 561 pohon (82%), diikuti kategori sedang 99 pohon (14%), tinggi 18 pohon (3%), dan sangat rendah 5 pohon. Rendahnya nilai VCR ini secara signifikan dipengaruhi oleh tingginya transparansi tajuk akibat serangan fenomena mati pucuk yang merontokkan dedaunan bagian pucuk dominan.
Secara keseluruhan, nilai TLI dan VCR menunjukkan bahwa status kesehatan Kebun Benih Semai Sengon Wamena di HKm Alue Seumantok masih berada dalam tingkat yang baik, aman, dan produktif secara struktural vegetasi. Meskipun demikian, penurunan kualitas tajuk akibat penyakit mati pucuk tidak boleh diabaikan karena berpotensi menurunkan kapasitas fotosintesis dan produksi benih jangka panjang. Oleh karena itu, direkomendasikan adanya tindakan manajemen silvikultur yang lebih intensif serta langkah penanganan dan pengendalian penyakit yang tepat guna mencegah perluasan kerusakan tajuk demi menjaga produktivitas kebun benih semai secara berkelanjutan.

The Wamena Sengon (Falcataria falcata) seedling seed orchard (KBS) within the Alue Seumantok Community Forest (HKm) serves to provide high-quality seedlings to support the sustainability of community-managed forests. The Wamena variety was selected for its superior genetic resistance to gall rust disease; however, its transfer to a new ecosystem requires intensive monitoring to ensure successful adaptation. This study aimed to analyze the Tree Damage Index (TLI), evaluate the Crown Condition Rating (VCR), and determine the final health status of the stand. Field data collection employed the Forest Health Monitoring (FHM) method across four sample plots (Plots 2, 8, 12, and 13), involving a total sample of 683 trees. Vitality analysis based on TLI values ​​revealed that the majority of the Wamena Sengon stand was healthy: 621 trees (91%) were categorized as healthy, 60 trees (9%) showed minor damage, and one tree each exhibited moderate and severe damage (both in Plot 12). Identified damage types included dieback, leaf discoloration, open wounds, broken branches, termite nests, stem cankers, gummosis, and liana infestation. Conversely, crown condition (VCR) results presented a contrast, being dominated by the "low" category (561 trees or 82%), followed by "medium" (99 trees or 14%), "high" (18 trees or 3%), and "very low" (5 trees). These low VCR values ​​were significantly influenced by high crown transparency resulting from dieback, which caused the loss of foliage in the dominant crown sections. Overall, the TLI and VCR values ​​indicate that the health status of the Wamena Sengon seedling seed orchard in the Alue Seumantok HKm remains good, safe, and productive in terms of vegetation structure. Nevertheless, the decline in crown quality caused by dieback disease cannot be overlooked, as it has the potential to reduce photosynthetic capacity and long-term seed production. Therefore, more intensive silvicultural management, along with appropriate disease handling and control measures, is recommended to prevent the spread of crown damage and ensure the sustainable productivity of the seedling seed orchard.