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All Journal JURNAL PERBENIHAN TANAMAN HUTAN AGRIVITA, Journal of Agricultural Science

Dede J. Sudrajat

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Author-ID : 2643444

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences

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Articles

Regeneration of Shorea spp. in the Seed Sources of KHDTK Haurbentes. Bogor District Kurniawati Purwaka Putri; Dede J. Sudrajat
Jurnal Perbenihan Tanaman Hutan Vol 5, No 2 (2017): Jurnal Perbenihan Tanaman Hutan
Publisher : Forest Tree Seed Technology Research & Development Center (FTSTRDC)/ Balai Penelitian dan

The role and function of forest area with special purpose (KHDTK) Haurbentes among other are the source of seeds and germplasm of Shorea spp. The information of the potency and dominance of Shorea spp. in KHDTK Haurbentes was indispensable in formulating the seed source management strategy. The aim of the research was to determine the regeneration level of Shorea spp. in Haurbentes KHDTK. The research was conducted in KHDTK Haurbentes in Jasinga, Bogor District. The research method used vegetation analysis. Observation plots were built based on the design of cluster plot Forest Health Monitoring circular (annular plot). Number of cluster plot of 6 pieces was set purposively. The results showed that S. pinanga was dominant species for the level of the tree, pole, sapling and seedling in cluster plots 1 and 7. The vegetation of trees level were dominated by S. stenoptera (cluster plots 2, 6, 8) and S. selanica (cluster plot 3). Vegetation of pole level were dominated by S. stenoptera (clusters plots 6 and 8) and S. selanica (cluster plots 2 and 3). H. mangarawan and S. mecisopteryx were dominant species for the level of sapling in clusters plot 6 and 8. Peuris and harendong (Melastoma polyanthum Bl) were dominant species at sapling level in cluster plots 2 and 3 for shrubs, while for species of shorea, the dominant species were S. stenoptera (clusters plots 2) and S. selanica (clusters plots 3). The dominant species at seedling level were H. mangarawan (clusters plot 2), S. mecisopteryx (clusters plot 3), S. selanica (clusters plot 6) and S. Stenoptera (cluster plots 8). The density of dominant species for the tree level was varied among cluster plots with a range of 55-143 individuals/hectare. Shorea spp. in KHDTK Haurbentes was sufficient with the number of individual regeneration more than adult trees. The sustainability of seed sources Shorea spp. in KHDTK Haurbentes in the future is quite assured.

Vigour Test to Predict Seed Germination and Normal Seedling Emergence of Acacia mangium in Nursery Endang Pujiastuti; Dede J. Sudrajat
Jurnal Perbenihan Tanaman Hutan Vol 5, No 2 (2017): Jurnal Perbenihan Tanaman Hutan
Publisher : Forest Tree Seed Technology Research & Development Center (FTSTRDC)/ Balai Penelitian dan

Standard germination does not always indicate seed lot potential performance, especially if field germination conditions are less than optimal. Seed vigour tests therefore have been proposed to detect more accurate differences in potential seed lot performance. This study is aimed to obtain more precise method to assess Acacia mangium seed vigour correlated to germination success in a greenhouse and normal seedling emergency in a nursery. Tests were conducted on 13 seed lots collected from some certified seed sources. Seed testing and nursery activities were carried out at the Seed Laboratory of Forest Tree Seed Technology Research & Development Centre, Bogor. Experimental designs were arranged in a completely randomized design with four replications for laboratory tests (standard germination, germination index, number of normal seedling in the first count, radicle length, tetrazolium test, controlled deterioration test, accelerated aging, conductivity test), germination in a greenhouse and direct sowing in a nursery. Results showed that all tests were significantly different for ranking seed vigor in the different seed lots. Seed lot from Subanjeriji-2 provided the best germination performance in the greenhouse and direct sowingin the nursery, followed by seed lot from Parungpanjang, while seed lot from Kenangan had the lowest germination performance. The relationship between some laboratory tests, i.e. top paper test, germination index, and electrical conductivity test, and the greenhouse and nursery tests were significant. The electrical conductivity test had the highest accuracy with R2= 0,6278 for greenhouse test and R2= 0,4057 for nursery test. Overall, among all the laboratory tests, electrical conductivity test showed seeds well, so the usage of the electrical conductivity test for predicting normal seedling emergence could be suitable in A. mangium nursery programs.

Morphological Diversity of Fruits, Seeds and Seedlings of Pongamia (Pongamia pinnata (L.) Pierre) in Java Island NFN Supriyanto; Iskandar Z. Siregar; Ani Suryani; Aam Aminah; Dede J. Sudrajat
Jurnal Perbenihan Tanaman Hutan Vol 5, No 2 (2017): Jurnal Perbenihan Tanaman Hutan
Publisher : Forest Tree Seed Technology Research & Development Center (FTSTRDC)/ Balai Penelitian dan

Pongamia (Pongamia pinnata (L.) Pierre) is one of a potential tree species to produce biodiesel. Pongamia-based biodiesel development program is still constrained by the availability of quality and quantity seeds due to the limited of seed sources. The purpose of this research was to identify the morphological diversity of fruits, seeds and seedlings from 5 populations in Java Island. Randomized completely design and randomized block design were used to assess the difference of fruits, seeds and seedlings morphological characteristics among populations. Principal component and hierarchy cluster analysis were used to explain variation pattern among populations. The results showed that the difference of populations was significantly affected by the difference of fruits, seeds, and seedlings morphology of pongamia. Seeds from Carita population showed good quality seed indicators with moisture content of 19.31%, and germination capacity of 74.50%. Sturdiness quotient of the seedling was 10.78. Contribution of genetic factor was higher than environtment factor is relation to the differences of morphological characteristics of fruits, seeds and seedlings of pongamia. Morphological character of the five populations can be divided into 3 groups, i.e. the first group of Batukaras and Kebumen, second group of Alas Purwo and Baluran, and group 3 was Carita.

Influence of Cutting Materials and Growth Regulators on the Growth of Trema (Trema orientalis L.) Cuttings NFN Danu; Dede J. Sudrajat; Nurmawati Siregar
Jurnal Perbenihan Tanaman Hutan Vol 6, No 1 (2018): Jurnal Perbenihan Tanaman Hutan
Publisher : Forest Tree Seed Technology Research & Development Center (FTSTRDC)/ Balai Penelitian dan

Trema orientalis L. is a potential species to be developed as a biomass-based renewable energy source. The use of quality seedling that can be done through vegetative techniques is one of the issues that determine the success of plantation development. The purpose of this research is to get the best cutting material and an optimal growth regulator for multiplication of shoot cuttings. The shoot cuttings were obtained from 12-month-old seedlings. The design used was a complete randomized design (CRD) factorial pattern with two factors, namely cuttings positions (shoot, middle and bottom parts) and concentration of naphthalene acetic acid (NAA) growth regulator of 0, 50, 100, 150, 200, 250, and 300 ppm. The result showed that T. Orientalis propagation can be carried out well by using seedling shoot section soaked in NAA 300 ppm for 10 minutes. The treatment was able to have the percentage of rooting cutting of 71.67percent, number of roots of 6 pieces, root dry weight of 0.088 g, and shoot dry weight of 0.148 g.

Variability in Morpho-physiology, Tuber Yield and Starch Content of Several Arrowroot Populations in Garut District Asep Rohandi; Budiadi Budiadi; Suryo Hardiwinoto; Eni Harmayani; Dede J. Sudrajat
AGRIVITA, Journal of Agricultural Science Vol 39, No 3 (2017): OCTOBER
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v39i3.1002

Arrowroot (Maranta arundinacea L.) is an important starchy plant which has potential utilization for food,industry and medicine. The study was undertaken to assess the variability in morpho-physiological characters, tuber yield and starch content of 23 arrowroot populations in Garut District, West Java. The result showed some significant differences in morpho-physiological characteristics, tuber yield and starch content. Growth characteristics revealed that Cilawu population recorded the highest values for some characters: high, leaf number, above growth biomass and tuber biomass. Cikajang population showed the highest tuber yield (210.6 g per plant) followed by Cilawu population (134 g per plant). Cikajang and Cilawu populations also provided the highest tuber biomass, 46.6 g and 60.0 g respectively. Cilawu population was a second population producing the highest starch content (26.1 %) after Cibatu population (27 %). The higher heritability coupled with genetic advance revealed for fresh tuber yield indicated that selection on basis of the character may be helpful to improve arrowroot yield. Most of the growth characteristics had not significant correlation indicating that the characteristics are not good indicator for selection. Cilawu, Cikajang and Cibatu populations have good potential to produce the high quality and quantity of tuber for arrowroot cultivation in Garut District.

Co-Authors Aam Aminah Ani Suryani Asep Rohandi Endang Pujiastuti Eni Harmayani Evaristus Budiadi Iskandar Z. Siregar Kurniawati Purwaka Putri NFN Danu NFN Supriyanto Nurmawati Siregar Suryo Hardiwinoto

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