To support the cultivation of yellow cempaka (Michelia champaca) intensively, high quality seedlings was needed. One of the factors that affect the growth and quality of seedling was growth media. The objectives of the research were to (1) determine the effect of saw dust and rice husk as growth media than the top soil for yellow cempaka seedlings; (2) obtained the best composite media between top soil with saw dust and rice husk as media for growth media for yellow cempaka seedlings. The research was conducted in greenhouse, started from January to April 2013. The experiment used Completely Randomized Design (CRD) with 6 treatments and 3 replicates, every experiment unit consisted of 6 yellow cempaka seedlings so the total number amounted to 108 seedlings. The treatment were number of medias (1) top soil; (2) saw dust; (3) rice husk; (4) top soil + saw dust 1:1; (5) top soil + rice husk 1:1; (6) top soil + saw dust + rice husk 1:1:1.  Observed variables include high growth, diameter, number of leaves, root length, top root ratio, total dry weight and seedling quality index. The results showed that growth media of rice husk gave a good growth of yellow cempaka same as media top soil.  Composite growth media that had a better growth of yellow cempaka seedling was composite growth media top soil + rice husk 1:1.

The demand of mirabow wood is increasing nowdays, where as the existence species in the nature is getting reduced. Therefore, it’s preservation efforts are urgent to be done. Seed size was correlated with it’s vigor, where heavy seeds relatively have a better vigor, compare to the light one. The research was aimed to determine the effect of seed size to percentage of germination, average days to germinate, germination value and germination power of mirabow seeds. The research was conducted in greenhouse of Agriculture Faculty Lampung University on November 2013 to January 2014. The research was arranged in Complete Random Design (CRD), with 3 treatments and 4 replications. Seed are classified based on the weight of seed is heavy weight, medium weight, and light weight. Each unit of experiments was used 100 mirabow seeds. The observed variables were consisted of germination percentage, average day to germination, germination value, and germination power.  Data analysis methods used were homogeneity of variance, variance analysis, and least significant of difference test at 5% significant level. The results showed that seed size of mirabow has a positive effect to the germination. The heavy weight of seed (> 3.49 grams) gave a better response for germination percentage 80.250% and germination value 1.595 %/day compared with the medium weight (2.36--43.49 grams) and light weight (< 2.36 grams). Keywords: germination, mirabow, seed size

Allelopathy is the compound released by the plants (example: blady grass) to the environtment and where another plants is living and could obstruct or extinguish to another plants.  The purpose of research were to figure out the effect of allelopathy  from the blady grass toward the species of acacia seedlings, to figure out the weakest affected seedling species by blady grass allelopathy, and to figure out interaction between concentration of  extracted blady grass and seedling tree species.  The research was designed based on factorial in a complete random design.  Factor I was the seedlings, consisted of acacia, mangium, and acacia alba, while factor II was concentration of extracted blady grass allelopathy, consisted of non extracted allelopathy, extracted allelopathy 25%, extracted allelopathy 50%, extracted allelopathy 75%, and extracted allelopathy 100%. Every treatment was repeated 5 times. The number of the seedlings for each experimental unit was two seeding. The observed variables  were height, diameter of the stem, number of leaves, and living percentage of the seedlings.  This observation data was tested by Bartlett test to find the variance homogenity.  Then it was analyzed by using variance analysis, and tested by least significant difference (LSD).  The calculation were done at 5% significant level.  The result of this research showed that allelopathy of blady grass were significan to the growth of acacia, mangium and acacia alba seedlings. Based on the LSD at 5% was known that the concentrate of blady grass allelopathy had strongest negative effect to the growth seedlings was 100%.  Seedling that was the most resistant to the allelopathy of blady grass is mangium seedling.  It was known from the analysis of variance test there was an interaction between the seedling and the concentration of blady grass allelopathy that effect the height, leaves number, living percentage ofseedlings.  Key words : allelopathy, blady grass, and acacia

Teknologi penginderaan jauh dan sistem informasi geografis selalu berkembang dan telah menghasilkan berbagai jenis citra yang direkam dengan berbagai sensor (multisensor).  Penelitian ini bertujuan untuk membandingkan efektivitas dan efisiensi citra satelit Landsat-8, Sentinel-2, dan SPOT 7 yang digunakan dalam pemetaan tutupan lahan Hutan Pendidikan Konservasi Terpadu (HPKT) Tahura Wan Abdul Rachman (Tahura WAR). Metode yang digunakan adalah metode Analytical Hierarchy Process (AHP) dan perbandingan parameter. Nilai bobot dan skor AHP masing-masing parameter (waktu, biaya, ketersediaan citra, akurasi dan proses pengolahan) didapatkan dari hasil wawancara dengan ahli atau praktisi pengguna citra satelit, sedangkan perbandingan parameter dianalisis dengan studi literatur dan perhitungan manual. Hasil penelitian menunjukkan bahwa citra yang paling efektif dan efisien adalah citra Sentinel-2. Citra tersebut tergolong sangat baik ditinjau dari segi biaya, akurasi, proses pengolahan dan resolusi yang dimilikinya.Kata kunci: Analytical Hierarchy Process, citra satelit, sistem informasi geografis, Tahura WAR, tutupan lahan

Nedun tree (Pericopsis mooniana) is one of commercial trees.  The propagation of nedun tree generatively has an obstacle due to it’s dormant character and the variety of seeds weight and the both factors are suspected influence the germanitaion.  This research aimed to determine effect of seed weight for nedun seed germination and the best of seeds weight for nedun seed germination; the effect of soaking in hot water at beginning temperature 80˚C by different soaking period on germination, and the best effect of soaking in hot water at beginning temperature of 80˚C by different soaking period on germination.  This research was compiled in a randomized complete block design, with 5 treatments and 3 groups.  Seeds were catagorized in to three group of weight which were heavy, medium, and light.  The treatments consisted of without scarification (as a control), soaking in hot water at beginning temperature of 80ºC during 12 hours, 24 hours, 36 hours, and 48 hours.  Every experiment unit consisted of 100 seed.  The observed variables were consisted of germination percentage, mean daily germination, germination value, and the ability to germinate.  Data analysis methods were used variance homogenity, variance analysis and least of difference test at 5% significant level.  Based on the analysis of variance showed that seeds weight significantly affected the mean daily germination, but had no effect on germination percentage, germination value, and the ability to germinate.  Seeds weight had a mean daily germination 15.088 days to germinate.  The medium seeds were germinated faster than heavy seeds and light seeds.  Seed scarification gave effect on germination percentage and germination value significantly, but not significant on mean daily germination and ability to germinate. Seeds scarification with hot water at beginning temperature 80°C for 48 hours had germination percentage 28,000%, germination percentage was better than the scarification for 36 hours, 24 hours, 12 hours, and control.