Jurnal Penelitian Hutan Tanaman

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ISSN / EISSN : 1829-6327 / 2442-8930
Total articles ≅ 299
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Jurnal Penelitian Hutan Tanaman; doi:10.20886/jpht

Abstract:
Jurnal Penelitian Hutan Tanaman Journal Penelitian Hutan Tanaman
Ujang Wawan Darmawan, Hermanu Triwidodo, Purnama Hidayat, Noor Farikhah Haneda, Neo Endra Lelana
Jurnal Penelitian Hutan Tanaman, Volume 17, pp 1-13; doi:10.20886/jpht.2020.17.1.1-13

Abstract:
Bagworms are reported as severe pests in albizia in some areas. The bagworms species that attacked the plant in Java had been identified but had not been described well. Their natural enemies also had not been identified in this area. This information is essential and related to pest control opportunities. This study described several species of bagworm and their natural enemies. It also described the characters of the bag as a marker of the bagworm type. Samples were collected from ten localities spread across Central and West Java. Bagworms pupae were collected and reared so that the imago or natural enemies emerged. The parasitization rate against bagworm pupae was then determined. Imago and natural enemies were morphologically described, as are bags character. Four species of bagworm were associated with albizia stand, namely Pteroma plagiophleps, Chalia javana, Clania crameri, and Khopene cuprea. Description and desk study revealed synonymies among bagworm species. Morphologically, a bagworm species had a unique characteristic bag as a type in shape, pattern, and size. Natural enemies were commonly parasitic Hymenoptera and Diptera insects and entomopathogenic fungi. We concluded that bagworm species associated with a particular insect of the parasitoid. Our suggestion was the importance of a comprehensive depth study involving morphological (imago, bag, and larvae) and molecular approaches to overcome synonymies among bagworm species. ABSTRAK Ulat kantong sebagai hama serius pada sengon di beberapa daerah. Spesies ulat kantong yang menyerang sengon di Pulau Jawa sudah pernah diidentifikasi tetapi belum dideskripsikan dengan baik. Musuh alami ulat kantongnya juga belum pernah diidentifikasi. Informasi ini penting karena terkait peluang pengendaliannya. Tujuan penelitian untuk mendeskripsikan beberapa spesies ulat kantong yang menyerang sengon dan musuh alami yang berasosiasi dengannya serta mendeskripsikan karakter kantong sebagai penanda spesiesnya. Sampel diambil dari sepuluh lokasi yang tersebar di Jawa Tengah dan Jawa Barat. Pupa ulat kantong dikumpulkan, dipelihara sehingga imago atau musuh alami keluar dan tingkat parasitisasi ditentukan. Imago dan musuh alami dideskripsikan secara morfologi, demikian juga dengan karakter kantongnya. Empat spesies ulat kantong teridentifikasi berasosiasi dengan sengon adalah Pteroma plagiophleps, Chalia javana, Clania crameri, dan Khopene cuprea. Deskripsi dan penelusuran pustaka menunjukkan banyaknya nama sinonim yang terkait spesies-spesies tersebut. Secara morfologi, setiap spesies ulat kantong memiliki karakter kantong yang khas baik bentuk, pola maupun ukurannya. Musuh alami ulat kantong umumnya adalah serangga Hymenoptera dan Diptera serta cendawan entomopatogen. Adanya asosiasi spesies ulat kantong dengan spesies parasitoid tertentu. Banyaknya sinonim pada spesies ulat kantong perlu dikonfirmasi melalui pendekatan yang komprehensif dengan menggabungkan metode berbasis morfologi (imago, kantong, dan larva) sekaligus molekuler.
N. M. Heriyanto, Dolly Priatna, Ismayadi Samsoedin
Jurnal Penelitian Hutan Tanaman, Volume 17, pp 53-67; doi:10.20886/jpht.2020.17.1.53-67

Abstract:
Research on biodiversity and carbon sinks is still needed by the government to support policies in order to manage forests sustainably. The purpose of this study was to analyze the composition of species, stand structure, biomass and carbon sinks on peat-swamps in Bukit Batu, Bengkalis Regency, Riau Province. The research method was carried out with an inventory of vegetation to determine the potential of stands, rejuvenation, biomass and carbon sinks. Sample plots were taken randomly in the form of measuring plots of 100 m x 100 m in each condition of old secondary forest, young secondary forest and old scrub forest in the peat-swamp protection forest. The species commonly found and evenly spread in all conditions of the peat-swamp forest were Gymnacranthera paniculata, Shorea teysmanniana, and Shorea gibbosa. The structure of the third stand condition of the peat-swamp forest was still like a peat-swamp natural forest with the structure of the curve was in the shape of an inverted letter “J.” The three conditions of the peat-swamp forests have high biomass and carbon deposits with the highest content of those that were found in the old secondary forests, and the lowest was in the old scrub forests. The condition of the old secondary forests has the highest potential to absorb carbon dioxide in the air. The tree species that are potentially used as seed sources were S. teysmanniana, S. gibbosa and Diospyros maingayi.ABSTRAK Penelitian keanekaragaman hayati dan rosot karbon masih diperlukan pemerintah untuk mendukung kebijakan dalam rangka mengelola hutan secara berkelanjutan. Tujuan penelitian ini adalah untuk menganalisis komposisi jenis, struktur tegakan, biomassa dan rosot karbonnya pada rawa-gambut di Bukit Batu, Kabupaten Bengkalis, Provinsi Riau. Metode penelitian dilakukan dengan cara inventarisasi vegetasi guna mengetahui potensi tegakan, permudaan, biomassa dan rosot karbon. Sampel plot diambil secara acak berupa plot berukuran 100 m x 100 m di setiap kondisi hutan sekunder tua, hutan sekunder muda dan hutan belukar tua pada hutan lindung rawa-gambut. Jenis Gymnacranthera paniculata, Shorea teysmanniana dan Shorea gibbosa ditemukan tersebar merata di setiap kondisi hutan rawa-gambut. Struktur tegakan ketiga kondisi hutan rawa-gambut masih seperti hutan alam rawa-gambut dengan kurva struktur tegakan berbentuk huruf “J” terbalik. Ketiga kondisi hutan rawa-gambut tersebut memiliki biomassa dan simpanan karbon yang tinggi dengan biomassa dan simpanan karbon tertinggi ada di hutan sekunder tua dan terendah di hutan belukar tua. Kondisi hutan sekunder tua berpotensi untuk menyerap karbon dioksida di udara yang tertinggi. Pohon yang potensial dijadikan sumber benih adalah pohon S. teysmanniana, S. gibbosa, dan Diospyros maingayi.
Ujang Wawan Darmawan, Hermanu Triwidodo, Purnama Hidayat, Noor Farikhah Haneda
Jurnal Penelitian Hutan Tanaman, Volume 17, pp 15-26; doi:10.20886/jpht.2020.17.1.15-26

Abstract:
Pteroma plagiophleps Hampson bagworm is an important insect pest of albizia. It is necessary to understand the development stages of the larvae as the basis for its control. The research aims to determine the number of instars and the rate of increase in larval size based on the width of the head capsule. Furthermore, larval bag size as an easily observable variable was used to estimate the instar stage. Instar number and the size range were determined by nonlinear regression, while the instar stage was estimated by the regression equation using bag diameter and length. We concluded that the larvae experienced four instars. The head capsule of larvae grew regularly following Dyar’s pattern, with the value approximately 1.42. The bag size of instar 1, instar 2, instar 3, and instar 4 were estimated as a range from 0-2.19 mm; 2.19-3.55 mm; 3.55-6.10 mm; and more than 6.10 mm in length respectively. Our suggestion is bag length was reasonable to be used as a reliable predictor of the instar stage. ABSTRAKUlat kantong Pteroma plagiophleps Hampson merupakan serangga hama penting pada tanaman sengon. Perkembangan larvanya perlu diketahui sebagai dasar pengendaliannya. Penelitian bertujuan untuk menentukan jumlah instar dan laju pertambahan ukuran larva berdasarkan lebar kapsul kepalanya. Selain itu, juga untuk menduga instarnya dengan menggunakan ukuran kantong larva. Jumlah instar dan kisaran ukurannya ditentukan menggunakan persamaan regresi non linear, sedangkan tingkat instar diturunkan dari persamaan regresi linear menggunakan peubah ukuran diameter dan panjang kantong. Hasil penelitian menunjukkan bahwa larva ulat kantong diduga mengalami empat instar. Pertumbuhan larva mengikuti pola yang relatif konstan dengan nilai “koefisien Dyar” rata-rata 1,42. Dugaan ukuran panjang kantong larva instar 1, instar 2, instar 3, dan instar 4 masing-masing memiliki kisaran antara 0-2,19 mm 2,19-3,55 mm, 3,55-6,10 mm, dan lebih dari 6,10 mm. Kami menyimpulkan bahwa peubah panjang kantong larva cukup baik untuk digunakan sebagai penduga instar larva.
Farida Herry Susanty
Jurnal Penelitian Hutan Tanaman, Volume 17, pp 41-51; doi:10.20886/jpht.2020.17.1.41-51

Abstract:
The assessment of dipterocarp secondary forest recovery has important parameters namely stand density and diversity of forest species composition. This study aims to determine trends in patterns of change in density and diversity of secondary dipterocarp stands in natural forests based on variations in logging aged as projections of natural recovery that occurs in production natural forests. The study was conducted at the Natural Forest IUPHHK of PT. Gunung Gajah Abadi, Wahau, East Kalimantan. Data collection period on 2016-2019 by building temporary sampling plots of 11 plots (11 hectares) on 7 variations of logging aged. Density parameters (i.e. number of trees and basal area per unit area) and diversity (number of species, heterogeneity index, species abundance and evenness index) of Dipterocarp secondary forest stands will vary over the logging aged. The form of the relationship of stand density, abundance index and species evenness index is logarithmic regression form, while for base field parameter, the number and index of species diversity are polynomial or quadratic regression. Aged stands after logging is a factor that influences quite a large number of species composition, but is not large enough for other stand density and diversity parameters.ABSTRAKPenilaian pemulihan hutan sekunder dipterokarpa mempunyai parameter penting yaitu kerapatan tegakan dan keragaman komposisi jenis hutan. Penelitian ini bertujuan untuk mengetahui kecenderungan pola perubahan kerapatan dan keragaman tegakan pada hutan alam dipterokarpa sekunder berdasarkan variasi umur tebangan sebagai proyeksi tingkat pemulihan (recovery) alami yang terjadi pada hutan alam produksi. Penelitian dilaksanakan di IUPHHK Hutan Alam PT. Gunung Gajah Abadi, Wahau Kalimantan Timur. Periode pengumpulan data pada tahun 2016-2019 dengan pembuatan plot sampling temporer sebanyak 11 plot (seluas 11 ha) pada tujuh variasi umur tebangan. Parameter kerapatan (jumlah pohon dan bidang dasar per satuan luas) dan keragaman (jumlah jenis, indeks keanekaragaman, kelimpahan jenis dan indeks kemerataan jenis) tegakan hutan sekunder Dipterokarpa akan bervariasi sepanjang umur tebangan. Bentuk hubungan parameter kerapatan tegakan, indeks kelimpahan dan indeks kemerataan jenis adalah berbentuk regresi logaritma, sedangkan untuk parameter bidang dasar tegakan, jumlah dan indeks keanekaragaman jenis berbentuk regresi polynomial atau kuadratik. Umur tegakan setelah penebangan merupakan faktor yang memengaruhi cukup besar terhadap komposisi jumlah jenis, tetapi tidak cukup besar untuk parameter kerapatan dan keragaman tegakan lainnya.
Sahuri Sahuri
Jurnal Penelitian Hutan Tanaman, Volume 17, pp 27-40; doi:10.20886/jpht.2020.17.1.27-40

Abstract:
The rubber intercropping system with other economic crops can increase land productivity and rubber productivity. This study aimed to research the effects of intercropping treatments towards soil fertility, development of rubber girth expansion, latex yield, and potential intercrops yields. The study was conducted at the experimental plantation of Sembawa Rubber Research Center using a Randomized Block Design with three replications. The treatment factors are four cropping patterns, i.e: PT1: monoculture rubber; PT2: rubber pineapple, PT3: rubber+sweet corn; and PT4: rubber+cayenne pepper. Observed parameters in this study included rubber girth expansion, bark thickness, amount of tappable trees, amount of latex yield, and amount of potential intercrops yields. The data were statistically analyzed using ANOVA, followed by DMRT at the level of 5%. The results showed that intercropping treatment significantly affects the growth of rubber trees and reduces unproductive plant phases. Rubber trees in the intercropping treatment were ready for tapping 5 months earlier than in the monoculture rubber trees. However, the bark thickness was similar to that of the monoculture rubber trees. Intercropping treatments had no effect on latex yield per tree per tapping, but yield per hectare was greater in the intercropping treatments than monocultur rubber trees due to the number of trees that could be tapped was significantly higher. ABSTRAKTumpangsari karet dengan tanaman ekonomis lainnya dapat meningkatkan produktivitas lahan dan produktivitas karet. Penelitian ini bertujuan untuk mengetahui pengaruh perlakuan tumpangsari terhadap kesuburan tanah, pertumbuhan lilit batang karet/keliling batang karet, hasil lateks, dan potensi hasil tanaman sela. Penelitian dilaksanakan di Kebun Percobaan Pusat Penelitian Karet Sembawa menggunakan Rancangan Acak Kelompok dengan tiga ulangan. Faktor perlakuan yang diberikan adalah tiga pola tanam yaitu: PT1: karet monokultur; PT2: karet+nanas, PT3: karet+jagung manis; dan PT4: karet+cabai rawit. Parameter yang diamati meliputi: lilit batang karet, tebal kulit batang, matang sadap pohon karet, hasil lateks, potensi hasil tanaman sela dan analisis kesuburan tanah. Hasil penelitian menunjukkan bahwa perlakuan tumpangsari berpengaruh nyata terhadap peningkatan pertumbuhan pohon karet dan mengurangi fase tanaman belum menghasilkan yang tidak produktif. Pohon karet dengan perlakuan tumpangsari siap untuk disadap 5 bulan lebih awal daripada pohon karet monokultur. Sementara ketebalan kulit batang karet tidak berbeda nyata daripada pohon karet monokultur. Perlakuan tumpangsari tidak memberikan pengaruh terhadap hasil lateks per pohon per penyadapan, tetapi hasil per hektare lebih besar dengan perlakuan tumpangsari karena jumlah pohon yang dapat disadap nyata lebih tinggi.
Jurnal Penelitian Hutan Tanaman, Volume 16, pp 87-101; doi:10.20886/jpht.2019.16.2.87-101

Abstract:
Part areas of Protected Peatland Forest (PPF) Bram Itam River have been converted into agricultural and plantation areas. Consequently, it causes damage to its protected area function. To restore the ecosystem, a study is needed by considering ecological, social, and economic aspects through the establishment of demonstration plot in the Bram Itam River PPF. The aim of the study was to analyze the economic feasibility of three planting patterns on demonstration plots. Economic feasibility parameters evaluated include financial feasibility, continuity in generating income and the ability to meet the needs of farmer’s households lives. The analysis showed that from the aspect of financial feasibility, all cropping patterns deserve to be developed. From the aspect of continuity in generating income, the applied cropping pattern can provide continuous income. However, from the aspect of the ability to meet the household needs of the farmer, the proportion of 25% native species of peatland (275 trees/ha) and 75% areca nut (825 plants/ha) is needed. To increase household income, it is necessary to have an off farm intervention and diversification of peatland management; so that the needs of farmer households are fulfilled and can reduce pressure on peat land in the Bram Itam River PPF area.ABSTRAKSebagian kawasan Hutan Lindung Gambut (HLG) Sungai Bram Itam telah beralih fungsi menjadi areal pertanian dan perkebunan sehingga menyebabkan kerusakan fungsi lindung kawasannya. Untuk memulihkan ekosistemnya diperlukan kajian dengan mempertimbangkan aspek ekologi, sosial, dan ekonomi melalui pembangunan demplot pola-pola penanaman di kawasan HLG Sungai Bram Itam. Tujuan penelitian adalah untuk menganalisis kelayakan ekonomi dari tiga pola penanaman yang dikembangkan pada demplot uji coba. Parameter kelayakan ekonomi yang dievaluasi meliputi kelayakan finansial, kontinyuitas dalam menghasilkan pendapatan, dan kemampuan untuk mencukupi kebutuhan hidup rumah tangga petani. Hasil analisis menunjukan bahwa dari aspek kelayakan finansial, ketiga pola tanam layak untuk dikembangkan. Dari aspek kontinyuitas dalam menghasilkan pendapatan, semua pola tanam yang dikembangkan dapat memberikan pendapatan secara kontinyu. Namun dari aspek kemampuan untuk mencukupi kebutuhan rumah tangga petani hanya pola tanam dengan komposisi 25% tanaman asli gambut (275 pohon/ha) dengan 75% tanaman pinang (825 pohon/ha) yang dapat memenuhi kebutuhan hidup rumah tangga petani. Untuk meningkatkan pendapatan rumah tangga petani, maka diperlukan adanya intervensi off farm dan diversifikasi pengelolaan lahan gambut agar kebutuhan rumah tangga petani tercukupi dan sekaligus dapat mengurangi tekanan terhadap lahan gambut di kawasan HLG Sungai Bram Itam.
Chairil Anwar Siregar, Alfonsus H. Harianja, Dalilah Dalilah, Sidiq Cahyono, Soraya Ulfah
Jurnal Penelitian Hutan Tanaman, Volume 16, pp 115-131; doi:10.20886/jpht.2019.16.2.115-131

Abstract:
Community forest (HKm) as one scheme of social forestry has been established in Central Lombok Regency since 1999 and was legalized in 2010. The HKm covered an area of 1,809.5 ha and has formed an agroforestry pattern since it was first established 13 years ago. However, the plant distribution and economic value of production area remain unknown. Therefore this research is designed to record plant composition and calculate the economics value of HKm in the research area. Survey method using analysis of vegetation was carried out to measure the plant composition. Sampling intensity was 0.01% or 1.81 ha with a total number of sample plots were 45. Survey was also used to calculate the economic value, with sampling intensity of 1% or in total 32 households. The results showed that the plant composition consists of mature trees (2.02%), young trees (4.12%), sapling (26.44%) and seedling (67.41%). The plant density was 11,462 ind/ha and dominated by Coffea sp., Musa sp., Durio zibethinus, Theobroma cacaoa and Arthocarpus heterophyllus with proportion of 24.08%; 13.70%; 9.25%; 7.48% and 5.30%, respectively. Total economic value in the average was Rp 6,366,484/household/year or Rp 530,540/household/month. There was a downward trend in HKm production due to increased vegetation coverage. Exchange rate of HKm commodities can be improved by applying supporting strategic programs in HKm developments. ABSTRAKPembangunan Hutan Kemasyarakatan (HKm) di Kabupaten Lombok Tengah telah dimulai sejak tahun 1999 dalam bentuk ijin sementara pengelolaan HKm dan kemudian diterbitkan Ijin Usaha Pengelolaan Hutan Kemasyarakatan (IUP-HKm) pada tahun 2010 dengan luas areal 1.809,5 ha. Kawasan HKm dalam waktu tiga belas tahun (2000-2013) telah membentuk formasi hutan pola agroforestri. Namun demikian, distribusi tanaman dan nilai produksi kawasan belum diketahui. Untuk itu dilaksanakan penelitian guna mengetahui komposisi tanaman dan nilai produksinya. Penelitian dilaksanakan menggunakan metode survei dengan melakukan analisa vegetasi untuk mengetahui distribusi tanaman dengan intensitas sampling sebesar 0,01% atau 1,81 ha dengan jumlah plot sebanyak 45 unit. Untuk mengetahui nilai ekonomi dari produksi tanaman dalam HKm, dilaksanakan wawancara terhadap petani penggarap HKm dengan intensitas sampling 1% atau sebanyak 32 petani. Hasil penelitian menunjukkan bahwa komposisi tanaman yang ada dalam areal HKm terdiri dari strata pohon sebesar 2,02%, tiang 4,12%, pancang 26,44% dan semai 67,4%. Kerapatan tanaman 11.462 btg/ ha yang didominasi oleh tanaman kopi (Coffea sp.), pisang (Musa sp.), durian (Durio zibethinus), coklat (Theobroma cacao) dan nangka (Arthocarpus heterophyllus) dengan proporsi berturut-turut 24,08%; 13,70%; 9,25%; 7,48% dan 5,30%. Nilai ekonomi yang diperoleh rumah tangga petani rata-rata sebesar Rp 6.366.484/tahun atau Rp 530.540/bulan. Terdapat kecenderungan penurunan nilai produksi HKm akibat semakin meningkatnya penutupan lahan. Untuk meningkatkan...
Murniati Murniati, Hani S. Nuroniah, Darwo Darwo
Jurnal Penelitian Hutan Tanaman, Volume 16, pp 73-85; doi:10.20886/jpht.2019.16.2.73-85

Abstract:
Ex-situ conservation is highly beneficial in protecting biodiversity, especially to save certain species from extinction. Cempaka (Michelia champaca Linn.) is a tree species that is getting rare as its natural population at some areas were difficult to be discovered. Cempaka tree produces not only wood, but also flowers that can be used for perfumery raw materials and essential oils. Therefore, cempaka species needs to be conserved, either through in-situ or ex-situ method. In order to support ex-situ conservation, a plot of cempaka was established in 2011 at Pasir Hantap Research Forest, Sukabumi District-West Java. The genetic materials were collected from four populations, consisted of 42 mother trees divided by Lahat population (9 mother trees), Empat Lawang population (6 mother trees), Malang population (13 mother trees), and Pasuruan population (14 mother trees). Sub plots were designed based on the seedlings origin (population) and distance among sub plots were ≥ 50 m to avoid cross pollination among populations. The plots were maintained regularly, including weeding, fertilizing, and pest control. Growth observation of cempaka plants was conducted every six months up to 36 months old and then every one year afterwards. The observation consists of survival rate, height and diameter of cempaka stems. Average survival of cempaka plants at 48 moths old was 82.4%, the highest survival was found at Lahat population (94.8%). The highest height and diameter were found at Lahat population as well, i.e. 7.35 m and 13.1 cm, respectively. The lowest survival rate was found at Malang population (64.0%), meanwhile the lowest height and diameter growth were found at Pasuruan provenance, i.e. 2.99 m and 3.9 cm, respectively. It can be concluded that the highest growth, meaning its best performance of cempaka plants was shown by Lahat provenance. It implies that characteristics of mother trees and the seed quality gave a significant effect to the cempaka plant growth. ABSTRAKKonservasi ex-situ berfungsi untuk melindungi biodiversitas, terutama jenis-jenis yang terancam punah. Cempaka (Michelia champaca Linn.) termasuk dalam jenis yang semakin jarang ditemukan di populasi alaminya. Selain dimanfaatkan kayunya, bunga cempaka dipanen sebagai material parfum dan minyak. Sebagai salah satu upaya konservasi ex-situ, plot cempaka dibangun pada tahun 2011 di Hutan Penelitian Pasir Hantap, Sukabumi-Jawa Barat. Material genetik (biji) dikoleksi dari empat populasi cempaka yaitu dari 42 pohon induk yang terdiri atas : Lahat (9 pohon induk), Empat Lawang (6 pohon induk), Malang (13 pohon induk), dan Pasuruan (14 pohon induk). Plot penanaman dirancang berdasarkan asal populasi, selanjutnya jarak plot antar populasi minimal 50 m untuk menghindari terjadinya persilangan antar populasi. Pemeliharaan plot dilakukan secara berkala meliputi penyiangan, pemupukan dan pengendalian hama penyakit. Pengukuran performa pertumbuhan dilakukan setiap 6 bulan hingga umur 36...
I Wayan Widhana Susila, Ogi Setiawan, M Hidayatullah
Jurnal Penelitian Hutan Tanaman, Volume 16, pp 103-114; doi:10.20886/jpht.2019.16.2.103-114

Abstract:
Ketak (Ligodium circinnatum) is a superior Non-Timber Forest Product in West Nusa Tenggara. The research aimed to obtain data on potential, distribution, and growth habitat of ketak in Lombok Island. The study was conducted by purposive sampling inventory; the first line took randomly and the next line took systematically. Ketak was found in the Malimbu and Pusuk Forest (West Rinjani Protected Forest Management Unit (PFMU)), while in the East Rinjani PFMU was found in Lang-lang, Mentareng, and Obel-Obel. The potency for ketak in Lombok is relatively low i.e. 443 clumps/ha, 5.2 tendrils/clump and harvested aged 3 tendrils/clump. Any trees be able as climbing tree. Ketak grows well at altitude of less than 400 m above sea level, sloping to steep slopes, climate types C to E, rainfall 935 to 1,511 mm/year, temperatures 24-320C, humidity 50-88%, and light intensity 120 to 3,872 luxs. Ketak growths in soil characteristic as follow:granular structure, sandy texture, slightly acid to neutral pH, good absorption rate, and growth capability under low nutrient level. ABSTRAKKetak (Ligodium circinnatum) merupakan jenis Hasil Hutan Bukan Kayu unggulan di Nusa Tenggara Barat. Saat ini terjadi penurunan suplai bahan baku untuk kerajinan ketak di Lombok. Penelitian bertujuan untuk memperoleh informasi potensi, sebaran, dan tempat tumbuh ketak di Pulau Lombok. Penelitian dilakukan dengan cara inventarisasi dengan metode sampling secara purposif dan peletakan jalur (transek) pertama secara acak, kemudian jalur berikutnya secara sistematis. Rumput ketak ditemukan di Kawasan Hutan Malimbu dan Pusuk (Kesatuan Pemangkuan Hutan Lindung (KPHL) Rinjani Barat), sedangkan di KPHL Rinjani Timur ada di Kawasan Hutan Lang-lang, Mentareng, dan Obel-Obel. Potensi ketak di Lombok relatif rendah dengan jumlah rumpun 443 rumpun/ha, jumlah sulur 5,2 batang sulur/rumpun dan jumlah sulur yang siap dipanen 3 batang/rumpun. Semua jenis pohon bisa menjadi pohon pemanjat rumput ketak. Di Nusa Tenggara Barat rumput ketak mampu tumbuh diketinggian kurang dari 400 mdpl, lereng landai sampai curam, tipe iklim C sampai E menurut Schmidt dan Fergusson, curah hujan 935-1.511 mm/tahun, temperatur 24-320C, kelembaban50–88%, intensitas cahaya 120-3.872 lux. Ketak tumbuh pada kondisi tanah dengan struktur granuler, tekstur fraksi berpasir, pH tanah agak asam sampai netral, laju resapan air baik, dan bisa tumbuh baik sampai kondisi hara rendah.
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