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RESPON PERTUMBUHAN TANAMAN JATI PLUS PERHUTANI UMUR 11 TAHUN TERHADAP INTENSITAS PENJARANGAN DAN TUMPANG SARI (STUDI KASUS DI BKPH BEGAL KPH NGAWI, PERHUTANI JAWA TIMUR) Muhammad Fadhil Amiruddin Sudomo; Suryo Hardiwinoto; Sapto Indrioko; Budiadi Budiadi; Daryono Prehaten; Aris Wibowo
Jurnal Pemuliaan Tanaman Hutan Vol 15, No 1 (2021): Jurnal Pemuliaan Tanaman Hutan
Publisher : Center for Forest Biotechnology and Tree Improvement (CFBTI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jpth.2021.15.1.13-23

Thinning is one of silvicultural management actions in maintaining and increasing growth and quality of standing stands. This study aims to determine growth response of selected teak clone to several intensities of thinning and intercropping. The method was a factorial completely randomized block design (RCBD) with thinning intensity (4 levels): 0% (control = A1), 25% (A2), 50% (A3) and 75% (A4) as the main plot, while intercropping (2 levels), as the sub plot. The results showed that the Current Annual Increment (CAI) of diameter at breast height (CAI DBH), volume/tree (CAI vol/tree) and volume/hectare (CAI vol/ha) of stands gave a significant positive response to thinning intensity treatment. CAI DBH one year after thinning were 0.79 cm, 1.47 cm, and 2.46 cm; increased by 32%, 145% and 310% at the thinning intensity of 25%, 50% and 75% when they compared with the control (0.59 cm). CAI vol/ha of stand in the first year, namely 11.88 m/ha, 14.04m3/ha, and 16.78 m3/ha or with an increase of 9%, 29% and 54% respectively at an intensity of 25 %, 50% and 75% compared to the control.

Perbaikan Sifat Fisika dan Kimia Tanah pada Lahan Muara Sungai Progo pasca Rehabilitasi melalui Penanaman Bogem (Sonneratia sp) Eny Faridah; Daryono Prehaten; Cahyono Agus Dwi Koranto; Winastuti Dwi Atmanto; Haryono Supriyo; Handojo Hadi Nurjanto
Jurnal Ilmu Kehutanan Vol 15 No 2 (2021): September
Publisher : Faculty of Forestry Universitas Gadjah Mada

Mangrove planting in Progo River Esturaine in Kulon Progo was hindered by its marginal conditions, where the land was dominated by very dynamic sandy substrat. This condition has caused the growth of various planted mangrove seedlings by Forestry UGM team (2015-2016) was very low. Nevertheless, it was found that Sonneratia can grow well in the location. It was expected that Sonneratia can improve site condition so it became suitable for the growth of other mangrove species. This research aimed to assess soil properties of Progo River estuarine after rehabilitation using Sonneratia. Characterisation of soil physical (texture) and chemical (salinity, pH, and soil organic matter) properties were conducted in the Laboratory of Tree Physiology and Forest Soil, Faculty of Forestry UGM. Soil samples were collected from Sonneratia plant area in various growing conditions. The results showed that growth of Sonneratia affected soil physical properties particularly increasing the proportion of clay and silt, but not soil texture class. In general, more proportion of clay and sand were detected in the bigger Sonneratia plants and in the outer section of root system. The growth of Sonneratia also affected soil chemical properties particularly soil organic matter but not soil pH and salinity.

Optimalisasi Penggunaan Lahan dengan Sistem Agroforestri di Desa Ngancar, Ngawi: Land Use Optimization using Agroforestry System in Ngancar Village, Ngawi Winastuti Dwi Atmanto; Priyono Suryanto; Adriana Adriana; Ananto Triyogo; Eny Faridah; Daryono Prehaten; Budiadi Budiadi
PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol. 8 No. 2 (2023): PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat
Publisher : Institute for Research and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/pengabdianmu.v8i2.3938

Most of the people live in Ngancar village, Pitu sub-district, Ngawi district, East Java are farmers. They cultivate crops not only on their privately-owned land but also on Perhutani’s forest land which is dominated by old teak stands. One of the problem in cultivating agricultural crops under old teak stands is the crown cover. It will significantly reduce the light intensity received by crops, and consequently decreasing the yield potential. Knowledge about the shade tolerant species and various silvicultural techniques should be understood and practiced by farmers, so that they can optimize the land use and achieve the high yield. Community service activities by Team of Silviculture Department, Faculty of Forestry UGM are carried out by establishing demonstration plot, maintenance, evaluation of plant growth and health, as well as problem identification and evaluation of successful cultivation under agroforestry system. Observation, focus group discussion, interview, questionnaire and counselling are implemented in order to collect related data and information. This community service activity uses descriptive qualitative approach. Outcome from this community service activity is recommendation of several shade tolerant species which can be cultivated under the old stands such as longan, avocado, and ginger. In addition, silvicultural treatment such as embroidery, weeding, and pest and disease control should be intensively managed in agroforestry practice in order to achieve optimal yield productivity.

Kandungan Unsur Hara Daun Pinus Merkusi Jungh. et de Vriese dan Sifat-sifat Tanah di Tegakan dengan Produksi Getah yang Bervariasi Haryono Supriyo; Daryono Prehaten
Jurnal Ilmu Kehutanan Vol 7, No 2 (2013)
Publisher : Fakultas Kehutanan Universitas Gadjah Mada

Secara ekonomi, peranan tegakan Pinus dari tahun ke tahun meningkat dari nilai getahnya dan telah menjadi produk unggulan di Perum PERHUTANI. Di beberapa KPH produksi getah antara petak satu dengan petak lainnya mempunyai variasi yang cukup besar, padahal berasal dari bibit yang sama. Penelitian ini bertujuan untuk mencari sifat tanah dan iklimnya yang berakibat pada kandungan hara daun yang diduga sebagai penyebab perbedaan produksi getah. Penelitian dilakukan di Ngablak dengan produksi getah rendah (<4 g/pohon/3 hari), sehingga sudah tidak disadap lagi dan RPH Grabag dengan produksi getah lebih tinggi (<4 g/pohon/3 hari), sehingga sudah tidak disadap lagi dan RPH Grabag dengan produksi getah lebih tinggi (>>15 g/pohon/3 hari), kedua RPH terletak di KPH Kedu Utara. Penelitian dilakukan dengan membuat profil tanah pada masing-masing petak dengan 3 ulangan. Sampel daun segar diambil dengan memanjat pohon dengan memotong rantingnya, daun dan dianalisis unsur hara makro dan mikro. Hasil menunjukkan bahwa pada pinus di Ngablak terletak pada elevasi rata-rata 1.213 m dpl dan di Grabag pada elevasi 908 m dpl. Ketebalan solum di Ngablak hanya 60 cm, warna tanahnya lebih cerah (yellowish red) dan di dalam profil tanah terdapat banyak batu-batu yang keras, sedangkan di Grabag mempunyai solum > 90 cm, warna tanah lebih kelam (dark brown) dan tidak ada bahan kasar di dalamnya. Biomassa sersah, tinggi dan diameter di Ngablak hanya 1.317 ton/ha, 19,3 m dan 20,8 cm, sedangkan di Grabag 6.857 ton/ ha, 31,6 m dan 20,8 cm. Kandungan Mg dan Mn di Ngablak 0,14 ppm dan 86 ppm, sedangkan di Grabag 0,27 ppm dan 283 ppm. Kandungan unsur hara C, N, P, K, Ca, Na, Fe, Cu dan Zn relatif tidak begitu berbeda.Katakunci: Pinus merkusii, produksi getah, unsur hara, elevasi, sifat tanah Nutrient Content of Pinus merkusi Jungh. et de Vriese Leaf and Its Soil Properties under Varied Resin Production Levels of StandsAbstractEconomically, the role of pine stands increased because of the value of the resin. The resin has been a flagship product of Perum PERHUTANI. In some areas, resin production varied among compartments. The variation is quite large even the trees were from the same seed origins. This study aimed to study the soil properties and climate, which results in variation of leaf nutrient content. Those were predicted as the cause of differences in the production of resin. The study was conducted in both RPH Ngablak (lower resin production, (<4 g/tree/3 d) and RPH Grabag (higher resin production, (>15 g/tree/3 d), which are located in KPH Kedu Utara. Soil samples were taken in each compartment with three replications. Fresh leaf samples were collected and analyzed for the macro and micro nutrients. The results showed that the pine in Ngablak lies at an elevation of about 1,213 m, while in Grabag it lies on 908 m above sea level. The thickness of the soil’s solum in Ngablak was only 60 cm. The soil was brighter in colors (yellowish red) and many hard stones were found in soil’s profile. Whereas in Grabag the solum was > 90 cm, dark in color (dark brown) and no coarse material in the soil’s profile. Litter biomass, trees height and diameter in Ngablak were only 1,317 tons/ha, 19.3 m and 20.8 cm, respectively. While in Grabag, the litter biomass, trees height and diameter were accounted for 6,857 tons/ha, 31.6 m and 20.8 cm, respectively. The leaf content of Mg and Mn in Ngablak were 0.14 ppm and 86 ppm, respectively, while in Grabag were accounted for 0.27 ppm and 283 ppm, respectively. Nutrient content of C, N, P, K, Ca, Na, Fe, Cu and Zn in both areas were no significant different.

Pertumbuhan Stek Cabang Bambu Petung (Dendrocalamus asper) pada Media Tanah, Arang Sekam dan Media Kombinasinya. Adriana Adriana; Widaryanti W. Winarni; Daryono Prehaten; Ganis Nawangsih
Jurnal Ilmu Kehutanan Vol 8, No 1 (2014)
Publisher : Fakultas Kehutanan Universitas Gadjah Mada

Bambu petung banyak digunakan untuk bahan konstruksi bangunan karena sifatnya yang keras dan kuat. Pembiakan secara vegetatif menggunakan rimpang (rhizome), namun memiliki kelemahan, yaitu kesulitan dalam pembongkaran rumpun bambu. Oleh karena itu digunakan stek cabang,lebih praktis, bahan stekter sedia lebih banyak, mudah diperoleh, murah, tidak merusak rumpun asal, waktu pengambilan lebih cepat, dan pembentukan rumpun lebih mudah. Media pengakaran yang umum digunakan adalah top soil, namun pengadaan top soil dalam jumlah besar sulit, sehingga perlu dicari alternatif lain yaitu dengan mencampur media top soil dengan media lain. Media yang digunakan yaitu media tanah, arang sekam dan kombinasi tanah+arang sekam (2:1). Stek cabang bambu petung dengan umur pohon induk ± 2 tahun, diameter 2-3 cm dan panjang 2 ruas. Panjang tunas pada perlakuan media tanah, arang sekam dan kombinasi tanah+arang sekam menunjukkan berbeda di antara perlakuan. Jumlah tunas terbanyak terdapat pada perlakuan media arang sekam dan kombinasi tanah+arang sekam (3 tunas). Media campuran tanah+arang sekam menunjukkan panjang tunas terpanjang (37,11 cm), dan panjang akar terpanjang (17,5 cm). Media tanah dan arang sekam menunjukkan % berakar terbesar (86,67 %).Kata kunci: stek cabang, bambu petung, media tanah, arang sekam, pembiakan vegetatif. Growth of branches of petung bamboo (Dendrocalamus asper) grafting in soil media, husk charcoal, and their combinationAbstractRecently, the utilization of bamboo is more extensive, but the attention towards its regeneration is not sufficient. The use of stem or branch cuttings are more practical and having more benefits and promising because the cutting materials are more available, easier to gain, cheaper, undamaging the source clump, faster in the taking time, and easier in the clump formation. The common rooting media used is top soil (the fertile part of upper layer soil). Recently, it is quite hard to provide top soil in a large number. Thus, it is important to find an alternative source in order to decrease the use of top soil that is by mixing the top soil media with other materials. The media used were soil media, husk charcoal, and the mixture of soil and husk charcoal (2:1). The branch cuttings used were branches of petung bamboo taken from 2 years old amboo, with 2-3 cm in diameter, and 2 nodus in length. The treatment was done by giving some variations in the soil media, the husk charcoal,and the mixture of soil and huskcharcoal. The mixture of soil and huskcharcoal media gave a significant influencet o the length of sprout variable,but it did not give significant influence to the number of sprout, the length of root, and the percentage of rooting.

Kandungan Unsur Hara dalam Daun Jati yang Baru Jatuh pada Tapak yang Berbeda Haryono Supriyono; Daryono Prehaten
Jurnal Ilmu Kehutanan Vol 8, No 2 (2014)
Publisher : Fakultas Kehutanan Universitas Gadjah Mada

Seresah di lantai hutan memegang peranan penting dalam menjaga produktivitas dan kelestarian hutan selain dapat mengendalikan erosi, mempengaruhi daur hidrologi dan unsur hara juga berfungsi sebagai penyimpan karbon. Kandungan unsur hara dalam seresah/daun sangat dipengaruhi oleh: spesies, genetik, bahan induk, tanah, dan iklim. Penelitian ini bertujuan untuk mengetahui kandungan unsur-unsur hara C, N, P, K, Ca, Mg, Na, Fe, Mn, dan Cu dalam seresah daun jati yang baru jatuh pada beberapa tapak. Sampel seresah (daun) diambil dari tanaman jati berumur 10 tahun, dari klon-klon unggul yang berasal dari tapak yang berbeda di Jawa. Analisis C dilakukan dengan metode Walkley dan Black dan N dengan metode Kjeldahl. Analisis P, K, Ca, Mg, Na, Fe, Mn, dan Cu dilakukan dengan mengekstrak sampel dengan campuran asam keras (HClO4 + HNO3), P terekstrak diukur dengan spektrofotometer sedangkan unsur logam dengan Atomic Absorption Spectroscopy (AAS).Hasil penelitian menunjukkan bahwa kandungan C tidak jauh berbeda berkisar 46,49-52,32%, sedangkan kandungan N dan P agak berbeda dengan nilai 0,52-1,28% dan 0,04-0,14%, sedangkan kandungan K, Ca, dan Mg agak berbeda secara berturutan mempunyai nilai 0,06-0,52%, 1,69-2,64% dan 0,10-0,45%, sedangkan Na hampir tidak berbeda berkisar antara 0,018-0,025%. Kandungan Fe dan Mn mempunyai perbedaan yang cukup besar berkisar antara 185-898 ppm dan 63-202 ppm, sedangkan Cu dan Zn tidak banyak berbeda berkisar antara 54-126 ppm dan 32-58 ppm. Hubungan antara kadar unsur yang bersifat mobile (C, N, dan P) pada seresah dan tanah tidak menunjukkan tren yang nyata, sebaliknya unsur yang bersifat immobile (K, Ca, Mg, dan Na) selalu konsisten antara kadar unsur hara di seresah dengan kadar unsur hara di tanah.Kata kunci: : jati, seresah daun, unsur hara, tapak, JawaNutrients content from new fallen leaves of teak from different sitesAbstractLitter on forest floor plays a very important role to maintain forest productivity and sustainability. The litter can control soil erosion, hydrology and nutrient cycles and has a function as carbon storage. The nutrients content in the leaf litter is affected by species, genetic, parent material, soil and climate. The objective of this research was to investigate the nutrient content of C, N, P, K, Ca, Mg, Na, Fe, Mn, and Cu in the litter from different sites. The newly fallen leaves samples were taken from the clonal teak plantation at ten years old, which planted at seven different sites in Java. The carbon (C) analysis was done with Walkley and Black and N with Kjeldahl method. Meanwhile for total P, K, Ca, Mg, Na, Fe, Mn, and Cu, the samples were extracted with mixture between HClO4 and HNO3, extracted P was measured with spectrophotometer and the metals of K, Ca, Mg, Na, Fe, Mn, and Cu were measured with Atomic Absorption Spectroscopy (AAS). The result showed that carbon content was not much different, valued 46.49-52.32%, and N and P had a little bit different value 0.52-1.28% and 0.04-0.14%, respectively. K, Ca, and Mg content was slightly different valued 0.06-0.52%, 1.69-2.64%, and 0.10-0.45%, respectively, while Na almost had not different ranged between 0.018-0.025%. Fe and Mn content were much different among the sites ranged 185-898 ppm and 63-202 ppm, respectively, while Cu and Zn were not much different valued 54-126 ppm and 32-58 ppm, respectively. The relationship between levels of elements that are mobile (C, N, and P) on litter and soil do not indicate a real trend. Otherwise immobile elements (K, Ca, Mg, and Na) are always consistent between the levels of nutrients in the litter with high levels of nutrients in the soil.

Pengaruh Beberapa Karakteristik Kimia dan Fisika Tanah pada Pertumbuhan 30 Famili Uji Keturunan Jati (Tectona grandis) Umur 10 Tahun Daryono Prehaten; Sapto Indrioko; Suryo Hardiwinoto; Mohammad Na'iem; Haryono Supriyo
Jurnal Ilmu Kehutanan Vol 12, No 1 (2018)
Publisher : Fakultas Kehutanan Universitas Gadjah Mada

Pertumbuhan tanaman dipengaruhi oleh faktor genetik dan faktor lingkungan. Salah satu faktor lingkungan yang sangat memengaruhi pertumbuhan adalah sifat kimia dan fisika tanah. Beberapa famili jati yang ditanam pada lokasi yang berbeda diduga mempunyai respon pertumbuhan yang berbeda pula. Penelitian ini bertujuan untuk mengetahui respon pertumbuhan (tinggi dan diameter) tanaman jati dari 30 famili yang ditanam pada dua lokasi yang berbeda, secara khusus untuk mengetahui pengaruh karakteristik sifat kimia dan fisika tanah pada pertumbuhan jati di dua lokasi tersebut. Metode penelitian yang dilakukan untuk mengukur pertumbuhan 30 famili jati yaitu tinggi total tanaman dan diameter setinggi dada. Sampel tanah diambil dengan terlebih dahulu membuat lubang profil tanah berukuran 1 m × 1 m dengan kedalaman 1 meter kemudian sampel diambil dari kedalaman 0-10 cm, 10-20 cm, 20-40 cm, dan 40-60 cm. Sifat kimia yang diamati adalah pH H2O, C Organik, N total, P, K, Ca, dan Mg tersedia serta Kapasitas Pertukaran Kation (KPK), sedangkan sifat fisik yang diukur adalah tekstur. Analisis statistik dilakukan dengan melakukan uji-t. Hasil penelitian menunjukkan parameter diameter tanaman, semua (30) famili tanaman jati menunjukkan perbedaan yang nyata di antara dua lokasi, sedangkan parameter tinggi hanya sebagian kecil famili yang berbeda nyata. Karakter kimia dan fisik tanah juga menunjukkan perbedaan nyata di antara dua lokasi. Parameter kimia tanah yaitu pH H2O, K, Ca, dan Mg tersedia, berbeda nyata antara 2 lokasi sedangkan kandungan C Organik, P tersedia dan KPK tidak berbeda nyata. Sementara dari sifat fisiknya, kandungan lempung dan debu pada dua lokasi berbeda nyata, sedangkan kandungan pasirnya tidak berbeda secara nyata. Perbedaan-perbedaan tersebut menunjukkan beberapa sifat tanah memang memengaruhi respon tanaman jati dalam hal pertumbuhan baik tinggi maupun diameternya. The Effect of Soil Chemical and Physical Characteristics on Growth of 30 Families of Teak (Tectona grandis) in a 10-year-old Progeny TestAbstractSome environmental factors that greatly affect plant growth are soil’s physical and chemical properties. Some teak families planted at different locations alleged to have different growth responses. This study aimed to investigate the growth response of teak (height and diameter) from 30 families, and to determine the effect of soil chemical and physical characteristics on teak growth in two different locations. Teaks were measured for total height and diameter at breast height. Soil pits (size: 1 m x 1 m and 1 m in depth) were dug and samples were taken from 0-10 cm, 10-20 cm, 20-40 cm and 40-60 cm in depth. Soil characteristics measurement were conducted on pH (H2O), organic carbon, total Nitrogen, available P, K, Ca, and Mg, also the Cation Exchange Capacity (CEC). Further, soil physical properties been measured was soil texture. Statistical analysis was performed by t- test. The results showed that teak’s diameter of all 30 families, showed significant differences between the two locations, while only a small proportion of height parameters significantly differed among families. Chemical and physical characters of the soil also showed differences between the two locations. Soil pH (H2O), available K, Ca, and Mg, were significantly differed between the two locations while the content of organic C, available P and the CEC were not significantly differed. For the soil physical properties, content of clay and silt in two location significantly differed whereas the sand content did not differ significantly. These differences indicate that some properties of the soil were affecting the growth response of teak famili in terms of both height and diameter.

SOIL PROPERTIES OF EIGHT FOREST STANDS RESULTED FROM REHABILITATION OF DEGRADED LAND ON THE TROPICAL AREA FOR ALMOST A HALF CENTURY (Sifat-sifat Tanah Delapan Tegakan Hutan Hasil Rehabilitasi Lahan Terdegradasi pada Daerah Tropika Selama Setengah Abad) Haryono Supriyo; Daryono Prehaten; Arom Figyantika
Jurnal Manusia dan Lingkungan Vol 20, No 3 (2013): November
Publisher : Pusat Studi Lingkungan Hidup Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jml.18497

ABSTRACTPhysical, chemical and biological properties of soil are influenced by vegetation types which grow above it. Different tree species of stands will produce difference litter quantity, litter quality and also plants’ root system. Therefore quantifying physical and chemical soil properties in several stands after rehabilitation of degraded land will increase the understanding of forest soil characteristics. The research was conducted in 8 forest stands in Wanagama I, Gunungkidul, Yogyakarta. Collection of soil samples was done at the depth of 0-10, 10-30 and 30-50 cm by making soil profile. The result showed that the textural classes were from sandy clay loam to clay. The content of clay increased with increasing soil depth. Bulk density did not differ much among the profiles and soil depth, ranging from 0.90 to 1.28 g/cm3, and so were particle density ranged from 2.19 to 2.55 g/cm3 and pore space ranged from 47.89 to 58.08 %. pH H2O ranging from 5.81 to 7.49 (slightly acid to neutral), meanwhile pH KCl ranging from 4.44 to 6.37. C-organic content varied widely among the vegetations and soil depth ranged between 0.11 and 5.17 %. Available P and total P varied widely from 1 to 104 ppm and from 20 to 390 ppm, respectively. CEC were not much different among the profiles and soil depths, ranging from 19.80 to 38.06 cmol (+)/kg and base saturation in all samples were very high i.e. > 100 %. ABSTRAKSifat-sifat fisik, kimia dan biologi tanah dipengaruhi oleh tipe vegetasi yang tumbuh di atasnya. Perbedaan spesies pohon suatu tegakan akan menghasilkan perbedaan jumlah seresah, kualitas seresah dan juga sistem perakaran. Kuantifikasi sifat-sifat fisik dan kimia tanah pada beberapa tegakan hutan pada lahan terdegradasi setelah direhabilitasi akan meningkatkan pemahaman mengenai sifat-sifat tanah hutan. Penelitian dilakukan pada I jenis tegakan hutan di Hutan Pendidikan Wanagama, Gunungkidul, Yogyakarta. Pengambilan sampel tanah dilakukan pada kedalaman 0-10, 10-30 dan 30-50 cm dengan cara membuat profil tanah. Hasil penelitian menunjukkan bahwa kelas tekstur mulai dari geluh lempung pasiran sampai lempung. Kandungan lempung meningkat dengan semakin dalamnya tanah. Berat volume tidak banyak berbeda antar profil dan kedalaman tanah, berkisar antara 0,90 - 1,28 g/cm3, dan kerapatan partikel berkisar antara 2,19 - 2,55 g/ cm3, dan ruang pori tanah berkisar antara 47,89 - 58,08 %. pH H2O berkisar antara 5,81 - 7,49 (agak asam sampai netral), pH KCI berkisar dari 4,44 - 6,37. Kandungan C-organik sangat bervariasi antar jenis vegetasi dan kedalaman tanah mulai 0,11 - 5,17 %. Kandungan P tersedia dan P total sangat bervariasi, secaraberturut-turut dari 1- 104 ppm dan 20 - 370 ppm. Nilai KPK tidak banyak berbeda antar profil dan kedalaman tanah berkisar antara 19,80 - 38,06 cmol (+)/ kg dan kejenuhan basa untuk semua sampel mempunyai nilai sangat tinggi > 100 %.

Productivity of Arrowroots and Taro Grown Under Superior Teak Clones with Several Levels of Stand Density Daryono Prehaten; Suryo Hardiwinoto; Mohammad Naâ€™iem; Haryono Supriyo; Widiyatno Widiyatno; Dian Rodiana
Biosaintifika: Journal of Biology & Biology Education Vol 13, No 1 (2021): April 2021
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v13i1.26428

Perum Perhutani has an important role in providing food and wood for people. Diversity and diversification of food will reduce the need for one type of food, namely rice as a staple food. Some tuber and rhizome are source of alternative foodstuffs, such as taro and arrowroot. This study aimed to determine the suitability and productivity of arrowroot and taro planted under old superior teak clones with several levels of stand density. Arrowroot and taro were planted under 14-year-old teak stands with 4 levels of density. Both plants were planted in the form of an array, measuring of 3m x 15m, with a spacing of 75cm x 75cm between plants. They were arranged in Randomized Completely with Block Design (RCBD) placed in 4 blocks of observation as replications.Â The results showed that under superior teak clone had the potential to be planted with arrowroot and taro. Teak stand density influenced significantly some characteristics of arrowroot (leaves number, leaves area, stem height, stem diameter, root length) and taro (stem diameter, tuber diameter). Arrowroot productivity per hectare increased with low density of teak stands, accounted for 55, 59, 80, and 88 kg respectively. Meanwhile, taro productivity from very high to low teak density were 365, 301, 523, and 426 kg/ha. The novelty of this study is that there is no record of intercropping studies on old superior teak clones, so this is among the first studies. The benefit of from this research result, it could be employed by Perhutani to support the Indonesian government in the national food security program

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