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Jurnal Penelitian Tanaman Industri (Littri)
Published by Pusat Penelitian dan Pengembangan Perkebunan
ISSN : 08538212     EISSN : 25286870     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Jurnal Penelitian Tanaman Industri (JLITTRI) aims to publish primary research articles of current research topics, not simultaneously submitted to nor previously published in other scientific or technical ojournals. General review articles will not be accepted. The journal maintains strict standards of content, presentation,and reviewing. SCOPE The journal will consider primary research papers from any source if they make an original contribution to the experimental or theoretical understanding and application of theories and methodologies of some aspects of agricultural science in Indonesia including: Estate crops; Soil science; Climate science; Agronomy; Plant breeding; Biotechnology; Genetic resources; Plant pathology; Plant physiology; Entomology; Farming system; Postharvest technology; Socio-economic agriculture; Environment; Agricultural extension. The journal publishes Indonesian or English articles. Since the year of 2017, the jurnal is published twice a year in (June and December).
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 6 Documents
 1 
Search results for , issue "Vol 21, No 1 (2015): Maret 2015" : 6 Documents clear
DEHIDRASI DAN PEMBEKUAN JARINGAN APEKS TEBU UNTUK PENYIMPANAN JANGKA PANJANG IKA ROOSTIKA; RARA PUSPITA DEWI LIMA WATI; DARDA EFENDI
Jurnal Penelitian Tanaman Industri Vol 21, No 1 (2015): Maret 2015
Publisher : Pusat Penelitian dan Pengembangan Perkebunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/littri.v21n1.2015.25-32

Abstract

ABSTRAKTebu (Saccharum officinarum L.) merupakan tanaman yangdiperbanyak secara vegetatif. Kriopreservasi merupakan metode yangpaling sesuai untuk penyimpanan jangka panjang bagi tanaman yangdiperbanyak secara vegetatif. Dehidrasi dan pembekuan jaringan merupa-kan tahapan paling kritis yang menentukan keberhasilan kriopreservasi.Tujuan penelitian adalah untuk memperoleh durasi dehidrasi yang optimaldan metode pembekuan jaringan apeks tebu. Penelitian dilakukan diLaboratorium Kultur Jaringan, Kelompok Peneliti Biologi Sel danJaringan, Balai Penelitian dan Pengembangan Bioteknologi dan Sumber-daya Genetik Pertanian, Bogor pada Mei 2013 sampai Februari 2014.Untuk optimasi metode dehidrasi, apeks direndam dalam larutan PVS2(MS + gliserol 30% + etilen glikol 15% + dimetil sulfoksida 15% +sukrosa 0,4 M) selama 10, 20, 30, dan 40 menit. Untuk optimasi metodepembekuan, diujikan kombinasi perlakuan prakultur (dengan sukrosa 0;0,1; dan 0,3 M selama 5 hari) dan pemuatan dalam larutan LS (MS +gliserol 2 M + sukrosa 0,4 M) selama 0, 10, 20, dan 30 menit sebelumtahapan dehidrasi dan pembekuan jaringan di dalam nitrogen cair (-196 o C). Hasil penelitian menunjukkan durasi dehidrasi jaringan yangterbaik adalah 30 menit dalam larutan PVS2. Kombinasi perlakuanprakultur dengan sukrosa 0,3 M dan pemuatan dengan larutan LS selama10 menit merupakan metode terbaik untuk pembekuan jaringan. Persentasetumbuh sebelum dan setelah pembekuan dalam nitrogen cair berturut-turutadalah 100 dan 40%. Setelah kriopreservasi, biakan mampu tumbuhdengan tingkat multiplikasi tunas sekitar 10 tunas/eksplan. Metode yangdiperoleh pada penelitian ini berpeluang diterapkan untuk penyimpananplasma nutfah tebu dalam jangka panjang secara kriopreservasi daneliminasi patogen obligat secara krioterapi.Kata kunci: Saccharum officinarum L., apeks, dehidrasi, pembekuan,nitrogen cairABSTRACTSugarcane (Saccharum officinarum L.) is vegetatively propagatedplant. Cryopreservation is the most suitable method for long-termpreservation of vegetatively propagated plant. Dehydration and freezingare critical steps of successful cryopreservation so that it should beoptimized. The research aimed to obtain the optimal duration ofdehydration and freezing method of sugarcane apex tissues. Theexperiments were conducted at Tissue Culture Laboratory, Plant CellTissue Biology Group, Indonesian Center for Agricultural Biotechnologyand  Genetic  Resources  Research  and  Development  on  May2013−February 2014. To optimize dehydration method, the tissues wereexposured in PVS2 solution (MS + 30% glycerol + 15% ethylene glycol +15% dimethyl sulphoxide + 0.4 M sucrose) for 10, 20, 30, and 40 minutes.To optimize freezing method, the combined treatment of preculture withsucrose (0, 0.1, dan 0.3 M) for 5 days and loading in LS solution (MS + 2M glycerol + 0.4 M sucrose) for 0, 10, 20, dan 30 minutes) were testedbefore dehydration for 30 minutes and freezing in liquid nitrogen (-196 o C).The best duration of dehydration was 30 minutes. The combined treatmentof preculture on 0.3 M sucrose and loading for 10 minutes was the bestmethod for tissues freezing. Percentage of regrowth before and afterfreezing in liquid nitrogen was 100 and 40% respectively. Aftercryopreservation, the cultures could grow with high shoot multiplicationrate about 10 shoots/explant. The method resulted in this study can beapplied for long-term storage of sugarcane germplasms by cryopreser-vation and (elimination of obligate pathogens by cryotherapy.Keywords: Saccharum officinarum L., apex, dehydration, freezing, liquidnitrogen.
AKTIVITAS INSEKTISIDA EKSTRAK BUAH CABAI JAWA (Piper retrofractum) TERHADAP Helopeltis antonii (HEMIPTERA: MIRIDAE) GUSTI INDRIATI; DADANG DADANG; DJOKO PRIJONO
Jurnal Penelitian Tanaman Industri Vol 21, No 1 (2015): Maret 2015
Publisher : Pusat Penelitian dan Pengembangan Perkebunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/littri.v21n1.2015.33-40

Abstract

ABSTRAKHelopeltis antonii merupakan salah satu hama pada tanaman kakao,teh, dan jambu mete yang menyerang pucuk dan buah dengan menusukkanstiletnya untuk mengisap cairan sehingga menyebabkan kerusakan.Penelitian bertujuan menguji toksisitas ekstrak buah Piper retrofractum(cabai jawa) terhadap imago, pengaruh konsentrasi subletal terhadap nimfaketurunan, persistensi terhadap mortalitas dan oviposisi H. antonii.Penelitian dilaksanakan di Laboratorium Fisiologi dan ToksikologiSerangga, Institut Pertanian Bogor dan Laboratorium Proteksi Tanaman,Balai Penelitian Tanaman Industri dan Penyegar Sukabumi, mulai Mei2013 sampai April 2014. Buah mentimun digunakan sebagai inangpengganti untuk perbanyakan serangga uji H. antonii di laboratorium danmedia pengujian. Hasil penelitian menunjukkan kematian imago H.antonii, akibat perlakuan ekstrak P. retrofractum 0,05-0,3%, sudah terjadipada 24 jam setelah perlakuan (JSP). Sementara itu, pada 24 dan 48 JSPterjadi penurunan tingkat kematian H. antonii. Setelah 48 JSP, hanyaterjadi sedikit peningkatan kematian H. antonii. LC 50 dan LC 95 ekstrak P.retrofractum pada 120 JSP masing-masing 0,20 dan 0,49%. Jumlah nimfaketurunan yang dihasilkan pada perlakuan subletal ekstrak P. retrofractum0,203% (LC 50 ) lebih sedikit dibandingkan dengan konsentrasi 0,141%(LC 25 ). Ekstrak P. retrofractum yang dipajankan di bawah sinar mataharihingga 5 hari masih efektif terhadap imago (mortalitas 80%), tetapi tidakefektif dalam menghambat peletakan telur H. antonii. Penghambatanpeletakan telur terhadap imago H. antonii pada perlakuan ekstrak P.retrofractum 0,98% (2 × LC 95 ) yang dipajankan di bawah sinar matahariselama 0 dan 1 hari, dengan indeks penghambatan oviposisi 22,7 dan23,8%. Keefektifan ekstrak P. retrofractum perlu diuji di lapangan untukmenilai kelayakan dalam pengendalian H. antonii.Kata kunci: insektisida botani, mortalitas, oviposisi, persistensiABSTRACTHelopeltis antonii is cocoa, tea, and cashew nuts important pest thatcauses damage by sucking plant sap from shoots and nuts. This study wasconducted to test toxicity of Piper retrofractum fruit extract on adults,sublethal effect on the production nymphal progeny, and persistenceagainst mortality and oviposition of H. antonii. This study was conductedat The Fisiology and Insect Toxicology Laboratory, Plant ProtectionDepartement, Bogor Agricultural University and The Plant ProtectionLaboratory of Indonesian Industrial and Beverage Crops Research Institutefrom Mey 2013 to April 2014. Cucumber was used as a host substitute forrearing the test insect and as the testing medium. The results show thatadult mortality, due to the P. retrofractum leaf extract treatment 0.05-0.3%, has occured at 24 hours after treatment (HAT). Meanwhile, H.antonii mortality has decreased on 24 and 48 HAT. After 48 HAT, only aslight increased in H. antonii mortality. LC 50 and LC 95 of P. retrofractumextract at 120 HAT were 0.20 and 0.49%, respectively. The treatment atsublethal concentrations (LC 25 and LC 50 ) markedly decreased nymphalprogeny number. P. retrofractum extract suspensions at LC 95 and 2 × LC 95exposed under sunlight for 5 days were still effective against H. antoniiadults (80% mortality), but were not effective in females inhibitingoviposition. The oviposition inhibiting activity was observed only in thetreatment with P. retrofractum extract at 2 × LC 95  exposed under sunlightfor 0 and 1 day in which the oviposition deterrency indices were 22.7 and23.8% respectively. Key words: botanical insecticides, mortality, oviposition, persistence
KERAGAMAN FENOTIPE DAN GENETIK TIGA VARIETAS KELAPA GENJAH KOPYOR ASAL PATI JAWA TENGAH ISMAIL MASKROMO; ELSJE T. TENDA; MEITY A. TULALO; HENGKY NOVARIANTO; DEWI SUKMA; SUKENDAH SUKENDAH; SUDARSONO SUDARSONO
Jurnal Penelitian Tanaman Industri Vol 21, No 1 (2015): Maret 2015
Publisher : Pusat Penelitian dan Pengembangan Perkebunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/littri.v21n1.2015.1-8

Abstract

ABSTRAKKelapa Genjah kopyor asal Pati, Jawa Tengah merupakankekayaaan hayati asli Indonesia dengan nilai ekonomi tinggi. Informasikeragaman genetik kelapa kopyor masih terbatas. Data keragamanmorfologi dan genetik diperlukan dalam program pemuliaan kelapakopyor. Penelitian ini mempelajari keragaman tiga varietas kelapa genjahkopyor asal Pati yang telah dilepas berdasarkan karakter morfologi,kuantitas endosperma, dan keragaman alel marka SSR. Penelitiandilakukan di Pati dan di Laboratorium Plant Molecular Biology,Departemen Agronomi dan Hortikultura, IPB. Evaluasi dilakukan terhadaptiga populasi kelapa Genjah kopyor (hijau, coklat, dan kuning) dengan 30tanaman sampel untuk setiap populasi. Rataan data morfologi digunakanuntuk menyusun dendogram. Kuantitas endosperma diamati pada satubuah kelapa kopyor per tanaman yang dievaluasi. Karakteristikendosperma dikelompokkan sesuai kategori yang telah ditetapkan. Untuksetiap populasi, analisis marka dengan lima pasang primer SSR dilakukanpada 10 tanaman sampel. Data yang didapat digunakan untuk menentukankeragaman genetik kelapa Genjah kopyor asal Pati. Hasil pengamatanmenunjukkan keragaman morfologis dan alel SSR antar tanaman dalamvarietasnya (keragaman intra-varietas) rendah. Sebaliknya, keragamanmorfologis dan alel SSR antar varietasnya tinggi. Kuantitas endospermakelapa Genjah kopyor asal Pati bervariasi antara skor 1–6. Keragamangenetik yang rendah dalam varietas dan tinggi antar ketiga varietas (coklat,hijau, dan kuning) memperkuat pelepasan ketiganya sebagai varietas lokal.Selain itu, keragaman genetik antar tanaman dalam varietas yang rendahmendukung penggunaan ketiga varietas lokal sebagai tetua dalam programperakitan varietas kelapa kopyor unggul baru. Tetua yang dipilih dapatdiseleksi intra-varietas berdasarkan persentase buah kopyor per tandandan skor kuantitas endosperma yang tinggi.Kata kunci: Keragaman morfologis, keragaman intra dan antar varietas,kuantitas endospermaABSTRACTKopyor dwarf coconuts are mutants from Pati, Central Java havinghigh economic values. However, morphological and genetic diversities ofthis coconut were still limited. Morphological and genetic diversity dataare needed for breeding program. The research objectives were to evaluateintra and inter-specific diversity based on morphology, endospermquantity, and SSR alleles. Field evaluations were conducted in Pati whilelaboratory activities were at Plant Molecular Biology Laboratory,Department of Agronomy and Horticulture, IPB. Three populations ofkopyor dwarf varieties (brown, green, and yellow) were evaluated. Thirtytrees were sampled for each population. The average of morphologicaldata were used to construct cluster analysis. Endosperm quantity wasscored (0 – 9) based on a single nut sample. Ten palms were analyzedusing five SSR loci for each population and used to determine geneticdiversity of populations. Results of observations indicated intra-varietymorphological and SSR allele variations among kopyor dwarf was low.However, inter-variety variations were high. The endosperm quantityscores among kopyor dwarf coconut ranged from 1–6. The low intra-variety and high inter-variety variations among the three kopyor dwarfcoconut supported their release as different local varieties. Moreover, thelow intra-variety phenotypic and genotypic diversities among kopyorbrown, green, and yellow dwarf coconut support their use as parents fornew and superior kopyor coconut variety development in the future. Forsuch purpose, however, it is necessary to conduct intra-variety selection toidentify desirable parents based on high kopyor fruit percentage per bunchand for high kopyor endosperm quantity.Key words: Morphological diversity, intra and inter variety diversities,quantity, endosperm
TANAMAN KECUBUNG (Datura metel L.) SEBAGAI BAHAN BAKU INSEKTISIDA BOTANIS UNTUK MENGENDALIKAN HAMA Aspidomorpha milliaris F. HERWITA IDRIS
Jurnal Penelitian Tanaman Industri Vol 21, No 1 (2015): Maret 2015
Publisher : Pusat Penelitian dan Pengembangan Perkebunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/littri.v21n1.2015.41-46

Abstract

ABSTRAKKecubung (Datura metel L.) adalah salah satu tanaman obattradisional yang berpotensi sebagai sumber insektisida botanis, namunsampai saat ini belum banyak diteliti. Tujuan penelitian ini adalah untukmengetahui efektivitas tanaman kecubung sebagai bahan insektisidabotanis, terhadap serangga Aspidomorpha milliaris F (Coleoptera:Crysomelidae). Penelitian dilakukan di KP. Laing Solok mulai bulan Aprilsampai Oktober 2012, dengan menggunakan rancangan acak lengkap (9perlakuan dan 3 ulangan). Perlakuan yang diuji adalah ekstrak daunkecubung pada konsentrasi 250, 500, 750, 1000, 1500, 2000, 2500, dan3500 ppm, serta 0 ppm sebagai kontrol. Perlakuan diaplikasikan secarakontak maupun non kontak. Serangga uji yang dipakai pada setiapperlakuan adalah 20 ekor larva instar III, IV, V, VI, dan 10 ekor imago.Parameter pengamatan meliputi persentase kematian, penurunan volumemakan larva dan imago, fekunditas, serta periode prereproduktif imago.Hasil penelitian menunjukkan ekstrak daun kecubung yang diaplikasikansecara kontak lebih toksik dibandingkan dengan non kontak. Ekstrak daunkecubung kosentrasi 3500 ppm bersifat toksik, menolak makan, danmengurangi fekunditas A. milliaris. Tingkat kematian larva A. milliarisinstar III, IV, V, dan VI berkisar 28,46-39,51%, sedangkan penurunanvolume makan sebesar 10,44-15,76%. Fekunditas A. milliaris menurun21,77%. Oleh karena itu, ekstrak daun kecubung dapat dikembangkansebagai insektisida botanis.Kata kunci: kecubung, insektisida botanis, Aspidomorpha milliaris F.ABSTRACTAmethyst (Datura metel L) is one of a potential plants used as rawmaterial of botanical insecticides, but until now it had not been prived.The purpose of the research is to determine the potential of the amethystas a botanical insecticide to Aspidomorpha milliaris F. (Coleoptera:Crysomelidae). The research carried out in Laing Solok ExperimentalGarden from April to October 2012, in a completely randomized design (9treatments and 3 replications). The treatments were amethyst leaf aqueousextract at concentrations of 250, 500, 750, 1000, 1500, 2000, 2500, 3500ppm, and 0 ppm as a control. The treatments were applied contact andnon-contact. Test insects used in each treatment was 20 larvae instar III,IV, V, VI and 10 imagos. Observation parameters include the mortalitypercentage and eating volume decrease of larvae and imago, fecundity,and imago prereproductive period. The results showed that the leaf extractamethyst which were applied contactly was more toxic than the non-contact. The amethyst leaf extracts at 3500 ppm concentration are toxic. Italso could refuse to eat and reduce fecundity of A. milliari. The mortalityrate for larval instar III, IV, V, and VI ranged 28.46-39.51%, while adecrease of eat volume ranged 10.44-15.76%. The fecundity of A.milliaris decreased 21.77%. Therefore, the leaf amethyst extract can bedeveloped as a botanical insecticide.Keywords: amethyst, botanical insecticides, Aspidomorpha milliaris, F
DAYA GABUNG DAN HETEROSIS KARAKTER VEGETATIF, GENERATIF, DAN DAYA HASIL JARAK PAGAR (Jatropha curcas L.) MENGGUNAKAN ANALISIS DIALEL RR. SRI HARTATI; SUDARSONO SUDARSONO
Jurnal Penelitian Tanaman Industri Vol 21, No 1 (2015): Maret 2015
Publisher : Pusat Penelitian dan Pengembangan Perkebunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/littri.v21n1.2015.9-16

Abstract

ABSTRAKPerakitan varietas unggul memerlukan informasi daya gabung tetua,baik umum maupun khusus. Tetua dengan daya gabung umum (DGU)tinggi berpotensi menghasilkan varietas sintetis atau komposit. Sementaraitu, tetua dengan daya gabung khusus (DGK) tinggi berpotensimenghasilkan varietas hibrida. Tujuan penelitian adalah mengetahui dayagabung tetua jarak pagar yang dapat menghasilkan hibrida atau populasikomposit. Sepuluh tetua, yaitu 1 tetua berdaya hasil rendah, 6 menengah,dan 3 tinggi digunakan dalam persilangan dialel lengkap. Evaluasidilaksanakan di Kebun Percobaan Balittri Pakuwon Sukabumi, mulaiAgustus 2008 sampai Juli 2011 menggunakan Rancangan Acak Kelompoktiga ulangan. Karakter yang diamati yaitu tinggi tanaman, lingkar batang,lebar kanopi, umur mulai berbunga, serta jumlah cabang total, cabangproduktif, infloresen, tandan, fruit set, dan buah per tanaman. Analisisdialel menggunakan metode I Griffing. Hasil penelitian menunjukkan ratioragam DGU dan DGK lebih besar daripada satu ( DGU / DGK > 1) padasemua karakter yang dievaluasi. Tetua 3012-1 dan PT 15-1, yang berdayahasil tinggi, memiliki DGU tinggi pada karakter umur mulai berbunga,lebar kanopi, serta jumlah cabang total, cabang produktif, infloresen,tandan, dan buah. Tetua PT 33-2, yang berdaya hasil menengah, memilikiDGU tinggi pada karakter umur mulai berbunga, serta jumlah cabang total,cabang produktif, infloresen, dan buah. Sementara itu, tetua 575-3, yangberdaya hasil rendah, memiliki DGU tinggi pada lingkar batang. Tetua PT33-2, 3012-1, dan PT 15-1 berpotensi sebagai penyusun populasi dasaruntuk pembentukan varietas sintetik yang cepat berbunga dan berdayahasil tinggi. Tetua 575-3 berpotensi untuk dirakit sebagai varietas yangmemiliki lingkar batang besar dan berbunga lambat.Kata kunci: daya gabung umum, daya gabung khusus, gen aditif,komposit, Jatropha curcas L.ABSTRACTGeneral Combining Ability (GCA) and Specific Combining Ability(SCA) are important in creating high yielding varieties. A parent havinghigh GCA is appropriate to produce synthetic or composite varieties, whilehigh SCA is to produce hybrid. The research objective is to find out theinformation of parents combining ability in Jatropha curcas L. Researchwas conducted using diallel analysis. Ten genotypes i.e. 1 low yieldingparent, 6 medium, and 3 high were used to generate F1 arrays with fulldiallel analysis. Evaluation was conducted at Indonesian Spice andIndustrial Crops Research Institute Experimental Station, usingRandomized Block Design from August until July 2011. The observationwere plant height, stem girth, canopy width, days to flowering, andnumber of total branches, productive branches, inflorescences, bunches,fruit set percentages; and fruit per plant. Diallel analysis was usingGriffing Model I. Results showed that general variance, each of GCA andSCA ratio, is more than one ( GCA / SCA > 1) in all evaluated characters.High yielding parents of 3012-1 and PT 15-1 exhibited high GCA on daysto flowering, canopy width, and number of total branches, productivebranches, inflorescences, bunches, and fruits. Medium yielding parents ofPT 33-2 exhibited high GCA for days to flowering, number of totalbranches, productive branches, inflorescences, and fruits. Low yieldinggenotype of 575-3 exhibited high on stem girth. PT 33-2, 3012-1, and PT15-1 could be used for developing early flowering and high yieldingvarieties, while 575-3 was suitable for producing big stem girth and lateflowering varieties.Key word: general combining ability, specific combining ability, additivegen, composite, Jatropha curcas L.
PENGARUH UMUR PANEN RIMPANG TERHADAP PERUBAHAN FISIOLOGI DAN VIABILITAS BENIH JAHE PUTIH BESAR SELAMA PENYIMPANAN RUSMIN, DEVI; SUHARTANTO, M.R.; ILYAS, SATRIYAS; MANOHARA, DYAH; WIDAJATI, ENY
Jurnal Penelitian Tanaman Industri Vol 21, No 1 (2015): Maret 2015
Publisher : Pusat Penelitian dan Pengembangan Perkebunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/littri.v21n1.2015.17-24

Abstract

ABSTRAKSalah satu faktor yang menentukan daya simpan benih jahe putihbesar (JPB) adalah mutu. Mutu benih sangat ditentukan oleh tingkatkemasakan rimpang. Penelitian bertujuan untuk mengetahui pengaruhumur panen terhadap perubahan fisiologi dan viabilitas benih selamapenyimpanan. Penelitian dilaksanakan di Rumah Kaca dan LaboratoriumTeknologi Benih, Balai Penelitian Tanaman Rempah dan Obat sertaLaboratorium Pascapanen IPB Bogor, mulai bulan Juli 2012 sampaidengan Februari 2013. Rancangan yang digunakan adalah acak lengkap(RAL) dengan lima ulangan. Perlakuan yang diuji adalah tiga tingkat umurpanen benih 7, 8, dan 9 bulan setelah tanam (BST). Pengamatan dilakukanterhadap perubahan fisiologis (penyusutan bobot, persentase rimpangbertunas, tunas, kadar air, dan laju respirasi), serta viabilitas rimpang benih(daya tumbuh, tinggi, dan bobot kering bibit). Hasil penelitianmenunjukkan rimpang benih umur 7 dan 8 BST mempunyai daya simpanterbaik karena menghasilkan masing-masing total angka penyusutan bobotlebih rendah (24,65 dan 25,25%) dan tunas lebih pendek (0,30 dan 1,08cm) dibandingkan dengan umur panen 9 BST (27,13% dan 1,62 cm),selama 4 bulan disimpan. Masa dormansi rimpang benih JPB mulai pecahsetelah mengalami periode simpan 2 bulan. Pertumbuhannya mulaiseragam setelah 3 bulan simpan. Umur panen jahe 7 dan 8 BSTmempunyai derajat dormansi yang lebih tinggi dibanding 9 BST. Rimpangbenih umur panen 7, 8, dan 9 BST mempunyai daya tumbuh tinggi (>95%)dan pertumbuhan bibit seragam setelah 3 bulan disimpan.Kata kunci: Zingiber officinale Rosc., penyimpanan, benih, perubahanfisiologis, viabilitasABSTRACTOne of the factors that determine the storability of seed rhizome ofwhite big ginger (WBG) is quality. The quality is determined by thematurity levels of seed rhizome. The aim of the experiment was to observethe effect of harvesting time on physiological changes and seed viability ofWBG seed rhizomes during the storage. The experiment was conducted atGreen House and Seed Technology Laboratory of Indonesian Spice andMedicinal Crops Research Institute, Bogor and Postharvest Laboratory,IPB, from July 2012 to February 2013. The experiment was arranged in acompletely randomized design with five replications. The treatmentstested were three levels of WBG seed rhizome harvesting time: 7, 8, and 9month after planting (MAP). Variables observed were physiologicalchanges of seed rhizomes during the storage (weight loss, sproutingpercentage, shoot height, respiration rate, and moisture content) andviability (growth ability, height, and dry weight of the seedling). Theresults showed that seed rhizomes at 7 and 8 had the best storability, sinceit was produced each low rate of weight loss (24.65 and 25.25%), andshoots shorter (0.3 and 1.08 cm) than 9 MAP (27.13% and 1.62 cm), for 4months in storage. Dormancy of WBG seed rhizomes has been brokenafter 2 months in storage. Harvesting at 7 and 8 showed a degree ofdormancy higher than the harvesting age 9 MAP. Harvesting time at 7, 8,and 9 MAP had high growth ability (> 95%) and uniform seedling growthafter 3 months in storage.Keywords: Zingiber officinale Rosc., storage, seed, physiologicalchanges, viability

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