Abstrak. Kinho J, Halawane J, Irawan A, Kafiar Y. 2015. Evaluasi pertumbuhan tanaman uji keturunan eboni (Diospyros rumphii) umur satu tahun di persemaian. Pros Sem Nas Masy Biodiv Indon 1: 800-804. Diospyros rumphii Bakh. merupakan salah satu jenis kayu perdagangan yang dikenal dengan sebutan kayu eboni. Jenis ini memiliki nilai ekonomi yang tinggi sehingga menjadi daya tarik tersendiri bagi masyarakat dan industri untuk dieksploitasi. Sifat pertumbuhan yang lambat merupakan salah satu faktor pembatas dari jenis tersebut sehingga eksploitasi yang dilakukan secara besar-besaran pada masa lalu telah menyisakan kekhawatiran akan ancaman kelangkaan dan kepunahannya pada saat ini. Salah satu upaya yang dapat dilakukan untuk mempertahankan keberadaan jenis tersebut yaitu dengan melakukan konservasi sumber daya genetik. Penelitian uji keturunan ini bertujuan untuk mengetahui variasi genetik pertumbuhan dan menaksir nilai parameter genetik tanaman eboni umur 1 tahun di persemaian. Rancangan penelitian yang digunakan adalah rancangan acak lengkap berblok dengan menggunakan 22 famili, 4 treeplot, dan 12 blok. Hasil penelitian menunjukkan bahwa famili atau asal pohon induk berpengaruh nyata terhadap pertumbuhan tinggi dan diameter, yang menunjukkan bahwa secara genetik terdapat variasi pada pertumbuhan tinggi dan diameter tanaman uji keturunan eboni umur 1 tahun di persemaian. Taksiran nilai heritabilitas individu untuk parameter tinggi dan diameter masing-masing sebesar 0,59 dan 0,65. Adapun heritabilitas famili untuk parameter tinggi dan diameter masing-masing sebesar 0,97 dan 0,89. Korelasi genetik antara parameter tinggi dan diameter adalah 0,89, sedangkan korelasi fenotipe sebesar 0,50. Berdasarkan breeding value diketahui enam famili terbaik yang cukup stabil dalam performa pertumbuhan tinggi dan diameter yaitu famili 15, 14, 11, 12, 13, dan 22. Kata kunci: Eboni, persemaian, uji keturunan, variasi genetik Abstract. Kinho J, Halawane J, Irawan A, Kafiar Y. 2015. Evaluation of plant growth on progeny test ebony (Diospyros rumphii) age one year in the nursery. Pros Sem Nas Masy Biodiv Indon 1: 800-804. Diospyros rumphiiBakh. is one species of commercial timber where known as ebony. This species has a high economic value, thus the main attraction to the local people and industry to be exploited. This species has characterized on slow growing thus it is the limiting factors. Nowadays, this species decreases in nature and fear of extinction. This condition was caused by massive exploitation in the past. One effort to maintain the existence of these species is the conservation of genetic resources. This study aimed to determine the genetic variation of growth and assess the value of plant genetic parameters of ebony age one year in the nursery. The method of this research was a Randomized Complete Block Design by using 22 families, four tree plots, and 12 blocks. The results showed that family or the source of mother tree have a significant effect on height and diameter growth, which suggested that they had genetic variat...
This Research aims to determine (1) History, actors and the causes of conflict in terms of the social aspect of economic, cultural and institutional happened in PFMU Model Poigar (2) Recommendations settlement to parse tenurial conflicts PFMU Model Poigar. Data analysis method used is a qualitative approach. The results showed that land claims by communities began of forest utilization activities to meet basic needs. Tenurial conflicts PFMU Model Poigar is a structural conflict. Some of the main actors should receive priority attention is the processing community land in the area and local employers. Some of the basic causes of conflict tenurial PFMU Model Poigar is a lack of understanding about the existence of related parties PFMU Model Poigar, the dualism of authority, lack of community empowerment, and law enforcement is still weak.Based on consideration of the history, the actors involved and the cause of the conflict, then some of the recommendation of this study is the institutional strengthening KPHP Poigar model, the development of that partnership, and law enforcement.
Climate change has shortened the rainy season compared to the dry season in North Sulawesi. The El Nino phenomenon occurred in 2015 had an impact on the death of clove plants due to drought. Drought stress testing on several types of forestry plants in the North Sulawesi area is a matter that needs to be done in line with these conditions. Development of cempaka wasian (Magnolia tsiampaca (Miq.) Dandy), nantu (Palaquium obtusifolium Burck), and mahoni (Swietenia macrophylla King) plantations have been carried out by communities in North Sulawesi for a long time and have very good prospects. The research was done by conducting a simulation test at seedling level with treatment to be tested on volume and interval of watering. The watering volume consists of 3 levels, i.e. 100%, 50%, and 25% watering of the field capacity, while the watering intervals included once-daily, 3-day and 5-day watering once for 18 weeks. The results showed that nantu species has better resistance to drought stress conditions compared with mahogany and cempaka wasian.
This study aims to determine the suitability of using cocopeat as planting media at transplanting containers in the polytube of the cempaka seedlings growth. The method used in this research was implementing a trial use of cocopeat as transplanting media in the polytube and being compared to the growth of cempaka seedlings in polytubes and polybags containing topsoil. The parameters observed included percent survival (%), height (cm), and diameter (cm) of the plants. Through the t-test it was shown that the parameters of diameter, height, and percent survival of the cempaka seedlings using cocopeat as a transplanting media were significantly different than those using top soil as a transplanting media.
Cempaka wasian is a type of woody tree which has a substantial historical value associated with the local culture of the Minahasan people. The improvement of cempaka wasian plantation is essential due to their enormous importance and usage. This study aims to discover the impacts of duration, storage room, and containers used for the appropriate storage of cempaka wasian seeds. The design used in this study is entirely randomized design organized with a factorial pattern which consists of 3 factors; 1) storage duration, 2) storage room and 3) storage containers. Duration of storage was 2, 3, 4, and 5 months; meanwhile, storage rooms comprised of refrigerators, chambers, and air-conditioned room. Moreover, storing containers consisted of calico cloth, aluminium foils, and plastic bags. The study finding indicates that the seeds of cempaka wasian could still germinate if stored for five months by using plastics bags inside refrigerators. A significant provision of seeds and suitable timing are closely related to the proper seed storage techniques.
ABSTRAKPenelitian ini bertujuan untuk mengidentifikasi jenis patogen penyebab penyakit bercak daun pada bibit cempaka dan teknik pengendaliannya. Identifikasi penyebab penyakit perlu dilakukan untuk mengetahui teknik pengendalian yang cepat dan tepat. Identifikasi penyakit dilakukan secara makroskopis yaitu penanmpakan luar tanaman yang sakit dan secara mikroskopis yaitu dengan mengetahui patogen penyebab penyakit.Identifikasi dilakukan dengan menggunakan kunci determinasi cendawan. Hasil penelitian menunjukkan bahwa tanda awal penyakit bercak daun pada bibit cempaka di persemaian adalah adanya noda atau bercak bercak pada permukaan daun dengan batas yang jelas. Bercak daun yang terbentuk umumnya berwarna coklat dengan dikelilingi oleh batasan yang berwarna lebih gelap. Berdasarkan identifikasi secara mikroskopis dapat diketahui bahwa penyebab penyakit bercak daun pada bibit cempaka adalah fungi Colletotrichum sp. Beberapa teknik pengendalian yang dapat dilakukan untuk meminimilasir penyebaran penyakit ini antara lain dengan mengisolasi bibit yang telah terserang, pengurangan intensitas naungan dan penggunaan fungisida yang tepat. Kata kunci : Cempaka, bercak daun, colletotrichum sp. ABSTRACT This research purposes to identify the pathogen causing leaf spot in cempaka seedling and its control technique. Identify cause of disease is necessary to know precise technique control. Identification of disease was conducted in macroscopic appearances and microscopically to determine pathogens. Identification is done by using
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