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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Agrohorti Bulletin (e-Journal) Jurnal Ilmu Pertanian Indonesia Jurnal Hortikultura Indonesia Buletin Kebun Raya Jurnal Sains Teh dan Kina Jurnal Jamu Indonesia Jurnal Sains Terapan : Wahana Informasi dan Alih Teknologi Pertanian

Adolf Pieter Lontoh, Adolf Pieter

Department Agronomy And Horticulture, Faculty Of Agriculture, Bogor Agricultural University Jl. Meranti, Kampus IPB Darmaga, Bogor 16168, Indonesia

Author-ID : 2439200

Agriculture, Biological Sciences & Forestry Computer Science & IT Economics, Econometrics & Finance Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences Veterinary Other

Published : 18 Documents Claim Missing Document

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Manajemen Pemetikan Tanaman Teh (Camelia Sinensis (L) O. Kuntze) di Unit Perkebunan Tambi, Wonosobo, Jawa Tengah Ajeng Eka Prastiwi; Adolf Pieter Lontoh
Buletin Agrohorti Vol. 7 No. 1 (2019): Buletin Agrohorti
Publisher : Departemen Agronomi dan Hortikultura

Kegiatan penelitian di Unit Perkebunan Tambi bertujuan untuk meningkatkan kemampuan dan profesionalisme dalam proses kerja di lapang dan pengalaman teknis lapang pada tanaman teh serta menganalisis permasalahan yang terjadi di lapang. Tujuan khusus dari kegiatan penelitian adalah mempelajari manajemen pemetikan teh yang ada di Unit Perkebunan Tambi. Metode yang digunakan adalah metode langsung dan metode tidak langsung. Metode langsung dilaksanakan dengan mengikuti dan mengamati kegiatan teknis dalam budidaya teh di lapangan serta wawancara, sedangkan metode tidak langsung dilakukan dengan mengumpulkan data pendukung dari perusahaan berupa laporan manajemen, arsip kebun dan studi pustaka. Hasil pengamatan mandiri dari kegiatan penelitian pada aspek khusus pemetikan teh menunjukkan bahwa tinggi bidang petik, diameter bidang petik, tebal daun pemeliharaan, gilir petik, hanca petik, analisis pucuk, kapasitas petik, dan kebutuhan tenaga kerja sudah sesuai dengan standar dalam penerapan Good Agricultural Practices (GAP). Hasil analisis petik masih perlu perbaikan dalam kegiatan teknis pemetikan. Jenis klon Gambung 4 tumbuh optimal pada ketinggian 1000-1250 m dpl.

Manajemen Pemupukan Kelapa Sawit (Elaeis Guineensis Jacq.), Studi Kasus pada Kebun Sungai Sagu, Riau Rahmi Khalida; Adolf Pieter Lontoh
Buletin Agrohorti Vol. 7 No. 2 (2019): Buletin Agrohorti
Publisher : Departemen Agronomi dan Hortikultura

Kegiatan penelitian dilaksanakan di Kebun Sei Sagu, Riau pada tanggal 5 Februari 2018 hingga 4 Juni 2018. Pemupukan perlu dikelola dengan baik untuk mencapai efektivitas dan efisiensi. Pengamatan dilakukan terhadap manajemen pemupukan meliputi kaidah 6T (tepat jenis, tepat dosis, tepat waktu, tepat cara, tepat tempat, dan tepat alat), kehilangan pupuk (losses), dan prestasi kerja penabur. Hasil pengamatan menunjukkan manajemen pemupukan di Kebun Sei Sagu telah dilaksanakan dengan baik sesuai dengan standar perusahaan. Ketepatan dosis pada pemupukan mekanis diamati dari hasil uji paper trap dan ketepatan jenis dibuktikan melalui uji hara menggunakan perangkat uji pupuk. Rata-rata persentase ketepatan menurut kaidah 6 T ialah lebih dari 90%. Tenaga penabur yang digunakan memiliki prestasi kerja dengan rata-rata prestasi kerja melebihi standar yaitu 4.58 ha HK-1 atau 491.07 kg HK-1. Jumlah kehilangan pupuk pada pemupukan manual dan mekanis sangat kecil dan dianggap tidak merugikan perusahaan, yaitu sebesar 0.14% pada pemupukan manual dan 0.09% pada pemupukan mekanis.

Manipulasi Agronomi Bunga Iles-iles (Amorphophallus muelleri Blume) untuk Meningkatkan Produksi Biji Edi Santosa; Ani Kurniawati; Maryati Sari; Adolf Pieter Lontoh
Jurnal Ilmu Pertanian Indonesia Vol. 21 No. 2 (2016): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Corm of iles-iles (Amorphophallus muelleri Blume) is extracted for glucomannan production, a material that is widely used in medicinal, food, and beverage industries. Increasing demand on glucomannan promotes fast expansion of planting area in Indonesia, however, seed availability is limited. The objective of the experiment was to study corm age, planting distance, and planting depth in order to enhance seed production in A. muelleri. Two experiments were conducted under paranet of 65% in Leuwikopo Experimental Farm, Bogor Agricultural University (IPB) from June-November 2015. First experiment used 0- (bulbils), 1-, 2-, 3-, and 4-year-old corms. Second experiment used flowering 3-year-old corms, arranged by factorial of planting distance (0 × 0 cm and 50 × 50 cm) and planting depth (0 and 5 cm in depth). Results showed that flowering of A. muelleri was dependent on corm age, 96% of 3-year-old corms produced flower but none of the 1- and 4-years-old corms produced flower, whereas 8% of 2-year-old corms produced flower. Planting distance did not affect flower growth, while planting at a depth of 5 cm enhanced seed production. Present experiments imply that application of large 3-year-old corms, planting in dense population and at depth of 5 cm could enhance seed production of A. muelleri. It needs further investigation on seed quality from flowering of present treatments.

Kualitas Benih dan Pertumbuhan Bibit Tanaman Iles-Iles (Amorphophallus muelleri Blume) Asal Media Tumbuh Berbeda Maryati Sari; Edi Santosa; Adolf Pieter Lontoh; Ani Kurniawati
Jurnal Ilmu Pertanian Indonesia Vol. 24 No. 2 (2019): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Most of Amorphophallus muelleri seeds for corm production derives from natural production in the forest. The objective of research was to evaluate seed quality and seedling growth from natural and gibberellin (GA3)-induced flowering, and different growing media in order to develop seed production technology. The experiments were conducted at Leuwikopo Experimental Farm of Bogor Agricultural University, Bogor, Indonesia from August 2016-April 2017. A. muelleri seeds from six culture practices were compared, i.e., mother corms with natural flowering were planted in soil media, soil+rice husk charcoal, and soil+cow manure, and mother corms induced flowering using GA3 (1.000, 1.500, and 2000 ppm) were planted in soil media. Results indicated that berry size, color, seed color and size and seed germination rate were independent of seed production method, i.e., non-induction, GA3 induction, and growing media. Germination rate was >90%, and no abnormal sprouting was found. The highest seedling establishment, represented by full-expand of first leaf, was obtained from seeds of soil+rice husk charcoal media. Seedling from seeds of soil+rice husk charcoal and soil+cow manure media had larger leaves than the other treatments. Present study implies that application of rice husk charcoal or manure in the seed production of A. muelleri is important to obtain high quality seedling.

Flower Development and Its Implication for Seed Production on Amorphophallus muelleri Blume (Araceae) Edi Santosa; Adolf Pieter Lontoh; Ani Kurniawati; Maryarti Sari; Nobuo Sugiyama
Jurnal Hortikultura Indonesia Vol. 7 No. 2 (2016): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

ABSTRACTThere are many studies on agronomic and economic advantages of iles-iles (Amorphophallus muelleri Blume), leading to high demand on seed to support the rapid production expansion in many Asian countries. By contrast, there are few studies on flowering phenology and flower morphology although they affect the seed production. Therefore, we evaluated flowering phenology and flower morphology of 80 plants of A. muelleri grown in a field under 65% artificial shading net at Leuwikopo Experimental Farm IPB Darmaga, Bogor, Indonesia from May 2015 to July 2016 in order to improve seed production. A. muelleri produced solitary spadix, with female flowers at the lower part and male flowers at the upper part. Spadix grew slowly for 56-71 days after bud break, and then grew rapidly thereafter for 30-35 days until anthesis. Seed was harvested 9.6 to 10.2 months after anthesis. We devided the development of spadix into seven phases, bud break as stage I and berry maturity as stage VII. Stage VI to VII determined seed production. Seed production was also affected by roots formation and spadix size. There were strong positive correlations between lengths of the female zones with berry production. Some morphological characteristics of spadix were dependent on corm size, thus, it was likely that agronomic improvement to enhance female flower and corm sizes wasimportant in seed production.Keywords: developmental stage, female flower, iles-iles, male flower, seed production ABSTRAKTelah banyak kajian keunggulan agronomi dan ekonomi iles-iles (Amorphophallus muelleri Blume), sehingga mendorong peningkatan permintaan benih untuk mendukung perluasan areal produksi di banyak negara Asia. Namun demikian, kajian fenologi dan morfologi bunga khususnya terkait produksi benih masih terbatas. Oleh karena itu, kami mengkaji perkembangan dan morfologi 80 bunga iles-iles yang ditanam di bawah paranet 65% di Kebun Percobaan Leuwikopo IPB, Bogor, Indonesia dari Mei 2015 sampai Juli 2016 dalam rangka perbaikan produksi benih. Iles-iles menghasilkan sebuah tongkol bunga dengan bunga betina pada bagian bawah dan bunga jantan pada bagian atas. Tongkol bunga tumbuh lambat 58-71 hari setelah pecah tunas, diikuti tumbuh cepat 30-35 hari hingga antesis, dan biji dipanen 9.6 sampai 10.2 bulan setelahnya. Perkembangan bunga dari pecah tunas hingga buah matang dapat dibagi menjadi tujuh tahap. Tahap VI ke tahap VII menentukan keberhasilan produksi biji iles-iles. Selain itu, keberhasilan produksi biji juga dipengaruhi oleh keberadaan akar dan ukuran tongkol khususnya panjang bagian bunga betina. Beberapa karakter morfologi bunga iles-iles dipengaruhi oleh ukuran umbi saat tanam. Oleh karena itu, perlu perbaikan agronomis untuk meningkatkan ukuran umbi dan ukuran bunga betina guna mendukung produksi benih.Kata kunci: bunga betina, bunga jantan, iles-iles, produksi benih, tahap pertumbuhan

Invigorasi dan Pengaruhnya Terhadap Pertumbuhan Bibit Iles-iles (Amorphophallus muelleri Blume) (Invigoration and Its Impact on Seedling Growth of Iles-iles (Amorphophallus muelleri Blume)) Edi Santosa; Anas Dinnurrohman Susila; Adolf Pieter Lontoh
Jurnal Sains Terapan : Wahana Informasi dan Alih Teknologi Pertanian Vol. 4 No. 2 (2014): Jurnal Sains Terapan, Volume 4, Nomor 2, Tahun 2014
Publisher : IPB University

The experiments of vacuum-asisted seed invigoration was conducted in Bogor, Indonesia, in order to increase crop production of iles-iles (Amorphophallus muelleri). This research was conducted in two series of experiments. The first experiment was conducted to determine the level of vacuum. The research was using 5 treatments i.e., control 1 (soaked in the water), control 2 (soaked in a solution of 2% N), control 3 (vacuum in water media), vacuum in solution containing 2% N, 4% N, 2% NPK (2:1:1), 4% NPK, vacuum in solution of supplementary liquid fertilizer (PPC) 2% and 4% PPC. The results of of the first experiment showed that the vacuum treatment increased the germination of iles-iles, the best vacuum pressure was -250mmHg. In the second experiment, the vacuum in a solution 4% PPC generated the highest growth followed by vacuum in 2% solution of NPK and 4% of PPC. In addition, the vacuum in the nutrient solution over 4% lead to inhibition of growth. The implication of this study is that the provision of nutrients in the seeds can increase plant growth of iles-iles. Vacuum treatment can enhance the effectiveness of invigoration.Keywords : NPK, PPC, seed treatment, starter solution, vacuum

NPK Levels and Application Methods on Productivity of Amorphophallus muelleri Blume in Intercropping System Edi Santosa; Anas Dinurrohman Susila; Adolf Pieter Lontoh; Yoko Mine; Nobuo Sugiyama
Jurnal Jamu Indonesia Vol. 1 No. 2 (2016): Jurnal Jamu Indonesia
Publisher : Pusat Studi Biofarmaka Tropika LPPM IPB; Tropical Biopharmaca Research Center - Bogor Agricultural University

Underground corm of Amorphophallus muelleri Blume contained glucomannan, a raw material widely used in beverage, food and medicinal industries. In Indonesia, A. muelleri is grown under intercropping system, however, average corm production was considered low. The low productivity could be related to the low input of chemical fertilizers. Therefore, the effects of NPK fertilizers and methods of application on A. muelleri productivity were evaluated in the present study for intercropping system. Two experiments were conducted at Leuwikopo Experimental Farm, Bogor, Indonesia from 2010-2012 under canopy of coffee trees. First experiment was conducted using four levels of N, P, and K applications, i.e., N:P2O5:K2O at the rate 0:0:0, 100:60:80, 125:60:100 and 150:60:120 kg ha-1. In second experiment, N:P2O5:K2O fertilizers at the rate of 100:60:80 were applied by conventional (solid) and liquefied. Results of first experiment showed that application of N, P and K at rate of 100 kg, 60 kg, and 80 kg ha-1 produced fresh corm weight 636.3±91.7 g per plant or increased by 63% higher than control. However, higher rate of NPK application did not increase corm yield, possibly due to the occurrence of leaf discoloration. Higher rates of NPK also delayed harvest time 1 to 2 weeks compared with control and caused wide variation of corm size. Thus, excess application of NPK should be avoided for high productivity of A. muelleri. Second experiment showed that there was no significant different among methods of application on fresh corm weight, i.e., 413 g and 396 g from conventional and liquefied applications, respectively. These experiments conclude that application of NPK is important to enhance A. muelleri production in intercropping system.

Respons Pertumbuhan 16 Genotipe Teh (Camellia sinensis var. Assamica) Terhadap Pupuk Cair Anorganik Pasca Tercekam Durotun Nafisa; Heri Syahrian; Vitria Puspitasari Rahadi; Adolf Pieter Lontoh; Dwi Guntoro; M. Khais Prayoga
Jurnal Penelitian Teh dan Kina Vol 2 No 1 (2023): Jurnal Sains Teh dan Kina
Publisher : Research Institute for Tea and Cinchona

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/pptk.jur.jstk.v2i1.175

Pembibitan merupakan fase paling rentan pada tanaman, sehingga membutuhkan pemeliharaan yang tepat. Pertumbuhan bibit teh dapat dipengaruhi oleh faktor eksternal dan internal seperti genotipe tanaman dan kondisi tanah. Kekurangan unsur hara dapat menyebabkan tanaman mengalami penghambatan pertumbuhan. Pemupukan menjadi salah satu cara untuk memulihkan kembali tanaman yang mengalami defisiensi unsur hara, oleh karena itu dilakukan pengujian pemulihan beberapa genotipe bibit tanaman teh yang telah mengalami cekaman unsur hara karena tidak mendapatkan pemeliharaan yang optimal dengan pengaplikasian pupuk anorganik cair. Tujuan dari penelitian ini adalah untuk mengetahui respons pertumbuhan 16 genotipe teh terhadap pupuk anorganik cair pasca tercekam. Rancangan percobaan yang digunakan adalah rancangan acak kelompok lengkap (RAKL) satu faktor dengan tiga kali ulangan. Perlakuannya yaitu 16 genotipe teh yang berbeda dengan pemupukan menggunakan pupuk anorganik cair (Glow Green) satu taraf dosis (6 ml/L) setiap dua minggu sekali. Karakter yang diamati meliputi tinggi tanaman, jumlah daun, dan diameter batang. Data dianalisis menggunakan uji ANOVA dilanjutkan uji lanjut BNJ. Hasil dari penelitian ini adalah perbedaan genotipe teh yang diuji berpengaruh terhadap perbedaan respons pertumbuhan tinggi tanaman, diameter batang, dan jumlah daun namun tidak terdapat perbedaan yang nyata pada penambahan pertumbuhan setiap karakter pasca pemupukan pada setiap minggunya. Ke 16 genotipe teh yang diuji secara umum memberikan respons yang sama terhadap pengaplikaisan pupuk anorganik cair pasca tercekam.

Co-Authors Agung Jat Wibowo Arsa Ajeng Eka Prastiwi Anas Dinnurrohman Susila Anas Dinurrohman Susila Anggita Perdana Ani Kurniawati Ani Kurniawati Arisa Noguchi Durotun Nafisa Dwi Guntoro Edi Santosa Elly Kristiati Agustin, Elly Kristiati Gunar Widiyanto, Gunar Habib, Husein Herdiansah, Rian Heri Syahrian Husein Habib Ilham Kurniawan Ilham Kurniawan Ken Takahata Ken Takahata, Ken Khalida, Rahmi Lubis, Rio Elvandari M. Khais Prayoga Maryarti Sari Maryati Sari Muhamad Achmad Chozin Muhammad dan Heni Purnamawati Haryadi Danang Faqihhudin Nobuo Sugiyama Nobuo Sugiyama Nobuo Sugiyama Perdana, Anggita Prastiwi, Ajeng Eka Rahmi Khalida Rian Herdiansah Rio Elvandari Lubis Saputra, Yudha Vitria Puspitasari Rahadi Yoko Mine Yoko Mine Yudha Saputra

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