Tegakan sengon (Falcataria molucanna) ras lahan Jawa dibangun di Bali dengan tujuan untuk mengetahui keragaman pertumbuhan yang disebabkan oleh faktor lingkungan dan genetik pada umur 1-3 tahun. Tegakan sengon tersebut dibangunsebagai uji keturunan dengan rancangan Baris Kolom Incomplete Block Design (IBD). Tegakan sengon tersebut menguji 25 famili half-sib dengan single plot. Hasil penelitian menunjukkan bahwa keragaman pertumbuhan yang disebabkanoleh faktor genetik (aditif ) maupun faktor lingkungan berubah-ubah setiap tahun. Pada tahun pertama ragam aditif mempunyai peranan 3,38% untuk tinggi pohon dan 0,67% untuk diameter batang; pada tahun kedua ragam aditif sebesar3,40% untuk tinggi pohon dan 3,05% untuk diameter batang; dan pada tahun ketiga ragam aditif sebesar 3,90% untuk tinggi pohon dan 7,00% untuk diameter batang. Sedangkan sisanya mulai tahun pertama sampai ketiga pertumbuhandipengaruhi oleh ragam lingkungan. Berdasarkan hasil penelitian disimpulkan bahwa pertumbuhan tanaman sengon ras lahan Jawa mayoritas dipengaruhi oleh faktor lingkungan, sehingga disarankan tanaman sengon ras lahan Jawa harusmenggunakan sitim silvikultur yang tepat yang dapat mempercepat pertumbuhan tanaman sengon.
A progeny test of Araucaria cunninghamii seedling seed orchard was established in 2008 at Bondowoso, East Java. Eighty open-pollinated families collected from six seed sources (Fak-fak, Jayapura, Serui, Wamena, Manokwari and Queensland) were tested. The trial was designed as Randomized Complete Block Design (RCBD) comprised of 80 seedlots, 4 tree-line plots with 4 replications. The anitial spacing was 4 m x 2 m. The growth analysis at 5 years old was aimed to know performance of 6 seed sources.The result showed significant differences between families within seed source for both height and diameter growth. The average of height growth was 7,0 m and diameter was 5,1 cm. Indivual heritability estimates for height and diameter were 0.32 and 0.48 respectively while family heritability estimates for height and diameter wer 0.49 and 0.72 respectively. Genetic correlation between height and diameter was strong and positive (r g = 0.83).
Eucalyptus pellita F. Muell is one of pulp woods that is being developed through breeding plantation programs in Indonesia. The research aimed at exploring the chemical and morphological characteristics of fiber, and to determine the rank of plus trees from 4 provenances based on the suitability for pulps. The materials included the plus trees of E. pellita (9 years) from the 2nd generation of progeny tests in Pelaihari, South Borneo. Wood properties under investigation included the chemical properties and morphological fiber characteristics (fiber dimensions and its derived properties). In the present study, data were analyzed using descriptive statistic, Analytic Hierarchy Process (AHP) and Pearson's correlation. Results showed that the chemical properties of E. pellita, i.e. the contents of ethanol-toluene extractives, hot water soluble extractives, holocellulose, alphacelullose, and lignin were 3.
A provenance stands of sengon Solomon (Falcataria moluccana (Miq.) ABSTRAKTegakan provenan sengon Solomon (Falcataria moluccana (Miq.) Barneby & J.W. Grimes) telah dibangun di Bondowoso, Jawa Timur pada tahun 2011; dengan menggunakan benih yang berasal dari Solomon sebanyak 25 famili. Tegakan provenan dirancang menggunakan rancangan baris kolom (blok tidak lengkap) dengan 8 blok, 4 pohon per plot (tree plot) dan jarak tanam 3 m x 2 m. Karakter yang diamati adalah persen hidup, tinggi, diameter dan serangan penyakit karat tumor; pengamatan dilakukan setiap 6 bulan sekali, mulai dari umur 6 sampai 18 bulan. Hasil pengamatan menunjukkan bahwa rerata persen hidup berkisar antara 75% hingga 90%, pada umur 6 bulan (84,83%), 12 bulan (83,26%) dan 18 bulan (81,05%). Rerata tinggi dan diameter umur 6 bulan (2,42 m, 2,97 cm), 12 bulan (4,74 m, 5,56 cm), dan 18 bulan (7,35 m, 7,39 cm). Analisis varian tinggi, diameter, intensitas dan luas serangan penyakit menunjukkan perbedaan yang tidak nyata antara famili. Secara umum, semua famili sengon Solomon terserang penyakit karat tumor. Namun demikian famili nomer 2; 8; dan 23 menunjukkan intensitas dan luas serangan penyakit yang paling kecil, dibandingkan dengan famili lainnya. Dengan demikian famili-famili tersebut perlu mendapat perhatian secara
Swietenia macrophylla King. is an exotic species from Latin America. It had been planted in Indonesia since 1870 by the Dutch. This species is important construction timber in Indonesia. This study aimed to measure variation and genetic parameter estimation of S. macrophylla seedling as material of progeny trial development. The experimental design used Randomized Complete Block Design (RCBD) consisting of two factors, namely the land race (A) (Banjar-West Java, Samigaluh-Kulonprogro, Bondowoso-East Java and Lombok-West Nusa Tenggara) and mother trees (B) (35 mother trees). Five seedlings were recorded and repeated 5 times for each mother tree. In this study factor B nested in factor A. The result showed that land race significantly affected to height, stem diameter, and index of robustness; while the mother trees significantly affected to height, stem diameter, number of leaf, and index of robustness. Individual heritability of height, stem diameter, number of leaf, and index of robustness character were 0.35, 0.40, 0.17, and 0.48 respectively, while family heritability of height, stem diameter, number of leaf, and index of robustness character were 0.74, 0.75, 0.54, and 0.77 respectively. Genetic correlation between height and stem diameter (0.70), height and index of robustness (0.40), number of leaf and index of robustness (0.52) were positive value. While genetic correlation between height and number of leaf (-0.03), stem diameter and number of leaf (-0.46) and stem diameter and index of robustness (-0.67) were negative value.
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