Pendugaan Parameter Genetik, Korelasi, dan Klasterisasi 20 Genotipe Jarak Pagar (Jatropha Curcas L.)

Penelitian dilakukan di KP Pakuwon, Jawa Barat, pada ketinggian tempat sekitar 450 m dpl, jenis tanah Latosol dan tipe iklim B, pada bulan Mei 2008 sampai Desember 2009. Tujuan penelitian adalah untuk menganalisis parameter genetik, korelasi, dan klasterisasi 20 genotipe jarak pagar. Rancangan yang digunakan adalah acak kelompok lengkap dengan 20 genotipe sebagai perlakuan yang diulang tiga kali. Peubah yang diukur meliputi karakter vegetatif, generatif, dan hasil. Analisis data dilakukan melalui analisis ragam, analisis korelasi, analisis faktor, dan analisis klaster. Hasil penelitian menunjukkan bahwa (1) Jumlah infloresen/pohon, jumlah tandan buah/cabang, jumlah tandan buah/pohon, jumlah buah panen/ pohon, dan bobot satu butir buah memiliki variabilitas genetik yang luas dengan nilai heritabilitas dan kemajuan genetik yang cukup tinggi sampai tinggi. Seleksi terhadap karakter-karakter tersebut akan efektif. (2) Karakter jumlah infloresen/ pohon, jumlah tandan buah/cabang, dan jumlah tandan buah/ pohon berkorelasi positif dengan jumlah buah panen, baik secara genotipik maupun fenotipik. Secara fenotipik, tinggi tanaman berkorelasi positif dan jumlah cabang primer/pohon berkorelasi negatif dengan jumlah buah panen. (3) Klasterisasi menghasilkan enam klaster. Antara klaster I, II, dan IV mempunyai jarak yang agak dekat, sedangkan antara klaster III, V, dan VI agak jauh, demikian juga antara klaster I, II, dan IV

Selection of Vegetative and Generative Characters of Arabica Coffee by Using Sequential Path Analysis and Structural Equation Models

Interrelations among vegetative, generative and yield characters incoffee plantation is important in breeding and selection programs.Interrelationships among these characters are the causal model and it canbe analyzed by Sequential Path Analysis (SPA). This research was carriedout at Pakuwon Experimental Station located at 450 m above sea level, inLatosol soil type with B type of climate, from December 2010 to April2012. The objectives of this research is to analyze the direct or indirectinfluence of several vegetative and generative characters on yieldcharacters of Arabica coffee through the application of SPA and StructuralEquation Models (SEM). The observation method with systematicsampling on 40 Arabica coffee plants of Kartika 1 and Kartika 2 varietieswere used in this study. The results showed that the number of cherries ofArabica coffee var. Kartika 1 and 2 population in Pakuwon ExperimentalStation were affected directly by generative and indirectly by vegetativecharacters. Plant height and stem girth can be used as positive selectioncriteria for high yielding at vegetatite phase, while the character of widthcanophy can be used as negative selection criteria. In generative phase, thecharacter of quantity of productive branches and the amount of berries andflower cluster can be used as positive selection criteria

Evaluation of Grafted Plants From Nine of Robusta Coffee Clones with Local Rootstock

Productivity of Robusta coffee in Indonesia were classified as low of about 685 kg/ha/year, due to did not use the superior clones and their propagation technique conducted by seeds. Efforts to address these issues are the using of high yielding superior seed (above 1,000 kg/ha) and then were propagated by grafting. The objective of this research was to evaluate the success rate and growth of grafted plants arised from nine clones of Robusta coffee with Sukabumi local rootstock. The study was conducted in a Greenhouse of Pakuwon Research Station, Indonesian Industrial and Beverage Crops Research Institute, Sukabumi. A randomized block design with 9 treatment of grafting combination and 3 replication were used in this study. The nine of treatment as follows: (1) BP 42 + local, (2) BP 969 + local, (3) BP 306 + local, (4) BP 436 + local, (5) BP 913 + local, (6) BP 534 + local, (7) BP 239 + local (8) BP 430 + local, and (G9) BP 358 + local. The results showed that the plant height, leaf number, leaf area, number of branches, and grafting success rate of BP 430 + local at 5 months after grafting (MAG) more higher than other grafting combination

The Compatibility of Five Superior Cacao Clones as Scions with Rootstock of Half-Sib Family of Sulawesi 01 Clone

Grafting is the most common cocoa propagation technique applied by farmers. One of the factors that determine the grafting success in cacao is the compatibility level between the scion and rootstock. The objectives of this research was to evaluate the grafting compatibility of half-sib family of Sulawesi 01 clone as rootstock with five superior cacao clones i.e. Sulawesi 01, Sulawesi 02, Sca 6, MCC 01, and MCC 02 as scions. The research was conducted at Pakuwon Experimental Station, West Java, at the altitude of 450 m above sea level with Latosol type of soil and B type of climate (Schmidt & Fergusson), from April to September 2015. This research used the randomized completely block design with five treatments of grafting combinations and five replications. Observation was taken at 14th, 21st, and 28th days after grafting on the total percentage of surviving graftings, percentage of sprouting grafting, percentage of grafting that have not sprouted, and bud sprouting rates. Data were analyzed by variance, correlation, and regression analysis. The results showed that the surviving grafting, the sprouting grafting and the rate of sprouting up to the 28th days after grafting varied among the scions. Based on the parameters observed, Sulawesi 01, Sulawesi 2, and Sca 6 demonstrated higher compatibility rate compared to MCC 01 and MCC 02. The results is applicable in seedling provision through grafting techniques in order to support cacao rejuvenation and or rehabilitation

Pengaruh Mikroba Pelarut Fosfat Terhadap Pertumbuhan Dan Serapan Hara P Benih Kakao (Theobroma Cacao L.)

Mudah diserap oleh perakaran tanaman sehingga dapat meningkatkan pertumbuhan dan efisiensi pemupukan anorganik, namun demikian pengaruhnya terhadap benih kakao (Theobroma cacao L.) belum banyak diketahui. Oleh karena itu, telah dilakukan penelitian untuk menguji pengaruh mikroba pelarut fosfat terhadap pertumbuhan dan serapan hara P benih kakao. Penelitian dilakukan di rumah kaca Balai Penelitian Tanaman Industri dan Penyegar, Sukabumi mulai Januari sampai Desember 2012. Perlakuan yang dicoba yaitu A) subsoil (kontrol), B) subsoil + NPK, C) subsoil + pukan (1:1), D) subsoil + zeolit (0,5 kg/10 kg), E) subsoil + pukan + zeolit, F) subsoil + MPF, G) subsoil + NPK + MPF, H) subsoil + pukan + NPK + MPF, I) subsoil + zeolit + NPK + MPF, dan J) subsoil + pukan + zeolit + NPK + MPF. MPF diisolasi dari tanah perakaran kakao rakyat di Kabupaten Kolaka, Sulawesi Tenggara. Hasil penelitian menunjukkan bahwa inokulasi MPF yang dikombinasikan dengan pemberian pupuk NPK mampu meningkatkan tinggi tanaman dan bobot biomassa benih kakao sampai umur 12 minggu setelah perlakuan. Perlakuan MPF + NPK menghasilkan tinggi tanaman, bobot biomassa, dan serapan P tertinggi dibandingkan perlakuan lainnya. Isolat MPF yang dikombinasikan dengan pemberian NPK mampu meningkatkan serapan hara P oleh benih kakao sampai 3,07 kali.Kata Kunci: Theobroma cacao L., benih, mikroba pelarut fosfat, MPF, pertumbuhan, serapan hara PPhosphate solubilizing microbes (PSM) has been known capable of dissolving unavailable phosphates in the soil to the form that easily absorbed by crops so that increases crop growth and inorganic fertilizer efficiency, however in cacao it has not been known. The objective of the study was to evaluate the role of phosphate solubilizing microbes to the growth and P nutrient uptake by cacao (Theobroma cacao L.) seedlings. The experiment was conducted in the Greenhouse of Indonesian Industrial and Beverage Crops Research Institute, Sukabumi from January to December 2012. Treatments were arranged as follows: A) Subsoil (control), B) Subsoil + NPK, C) Subsoil + organic matter (1:1), D) Subsoil + zeolite (0.5 kg/10 kg), E) Subsoil + organic matter + zeolites, F) Subsoil + PSM, G) Subsoil + NPK + PSM, H) Subsoil + organic matter + NPK + PSM, I) Subsoil + zeolite + NPK + PSM, dan J) Subsoil + organic matter + zeolite + NPK + PSM. The results showed that PSM combined with NPK enhanced plant height and weight of the biomass of cacao seedling until 12 weeks after treatment (WAT). The treatment of PSM+NPK resulted in the highest plant height, biomass, and P nutrient uptake compared with others. PSM combined with NPK fertilizer are able to increase threefold P nutrient uptake by cacao seedling

Pupuk Organik Sebagai Subtitusi Pupuk Anorganik Menuju Pertanian Lada Perdu Organik

Penelitian dilaksanakan di kebun percobaan Pakuwon dari bulan Mei–Desember 2009. Rancangan penelitian yang digunakan adalah Rancangan Acak Kelompok pola Faktorial, Faktor pertama terdiri dari dua jenis lada hibrida LH 4-5-5 (V1) dan LH 6-2 (V2), serta Petaling 1 (V3) sebagai pembanding. Faktor kedua merupakan Paket teknologi, yaitu penggunaan dosis pupuk organik sebagai substitusi pupuk anorganik dengan lima tingkat komposisi media tumbuh campuran tanah dengan pupuk organik dan penggunaan dosis pupuk anorganik, yaitu: P0 = tanah 1 : pupuk organik 1 + pupuk anorganik 100 % SOP, P1 = tanah 1 : pupuk organik 2 + pupuk anorganik 80 % SOP, P2= tanah 1 : pupuk organik 3 + pupuk anorganik 60 % SOP, P3= tanah 1 : pupuk organik 4 + pupuk anorganik 40 % dan P4= tanah 1 : pupuk organik 5 + pupuk anorganik 20 % SOP. Jumlah tanaman setiap perlakuan sebanyak 5 tanaman dan diulang 3 kali , sehingga jumlah tanaman keseluruhan sebanyak 225 tanaman. Parameter yang diamati meliputi tinggi tanaman, jumlah cabang primer dan sekunder, lingkar pangkal batang, panjang ruas serta jumlah daun per cabang, serta analisis hara makro dan mikro dari masing-masing perlakuan media tanam. Hasil penelitian menunjukkan bahwa kebutuhan pupuk anorganik NPK-Mg pada tanaman lada perdu dalam pot pada awal pertumbuhan dapat disubstitusi dengan pupuk organik sampai 80 % dan kebutuhan pupuk anorganik hanya 20%. Lada hibrida LH 6-2 dan LH 4-5-5 memiliki peluang produktivitas lebih tinggi dibanding Petaling-1. Kombinasi perlakuan pemupukan dan varietas tidak menunjukkan pengaruh yang nyata terhadap pertumbuhan vegetatif lada perdu sampai umur 4 bulan, hal ini memberikan peluang budidaya lada perdu dengan sistem pot dapat dibudidayakan dengan sistem pertanian organik

Penentuan Karakter Pembeda Dua Populasi Kopi Arabika Di Kebun Percobaan Pakuwon Melalui Penggunaan Fungsi Diskriminan

Keragaman fenotipik dari beberapa genotipe tanaman karena pengaruh genetik dan lingkungan (GxE) dapat dianalisis melalui penggunaan fungsi diskriminan sehingga akan dapat diketahui informasi tentang karakter-karakter pembeda dari genotipe yang diuji. Penelitian dilakukan di Kebun Percobaan (KP) Pakuwon, Sukabumi, mulai bulan Desember 2010 sampai Mei 2012, dengan tujuan mengidentifikasi karakter-karakter yang dapat menjadi pembeda dua populasi kopi arabika (Kartika 1 dan 2) yang ditanam di KP. Pakuwon melalui pendekatan fungsi diskriminan. Contoh tanaman kopi varietas Kartika 1 dan 2 masing-masing sebanyak 20 tanaman dipilih secara sistematik, kemudian diamati pada umur 14-17 bulan setelah tanam terhadap 20 peubah morfologi tanaman. Data-data yang terkumpul dianalisis melalui penggunaan fungsi diskriminan. Hasil penelitian menunjukkan bahwa diperoleh 4 karakter pembeda dua varietas kopi arabika (Kartika 1 dan Kartika 2), yaitu jumlah cabang total/tanaman, jumlah ruas/cabang, jumlah tandan/cabang, dan bobot kering buah. Varietas Kartika 1 memiliki jumlah cabang total/tanaman, jumlah tandan/cabang, dan bobot kering buah lebih tinggi daripada Kartika 2, sedangkan jumlah ruas cabangnya lebih rendah. Keempat karakter tersebut secara nyata dapat membedakan kedua varietas kopi dengan tingkat validitasnya sebesar 82,5%. Hasil penelitian ini didasari oleh teori GxE dan dapat memberikan implikasi bagi kajian dan penelitian-penelitian berikutnya dalam upaya peningkatan produktivitas dan atau mutu hasil kopi, khususnya Kartika 1 dan 2 di KP. Pakuwon. .Determination of Characters to Distinguish Two Population of Coffea Arabica at Pakuwon Experimental Station by Discriminant Function Phenotypic variability of several plant genotypes is affected by genetic (G) and environment (E) factors, known as GxE. The GxE can be analyzed through discriminant functions being able to know information several characters as differentiator of genotypes. A study was conducted at Pakuwon Experimental Station (KP. Pakuwon), Sukabumi, from December 2010 to May 2012. To identify the characters being able to distinguish two populations of Coffea arabica (Kartika 1 and 2), the discriminant function was used. Sistematic sampling of 20 sample plants of Kartika 1 and 2 each was used in this study. As many as 20 variables of plant morphology were observed for 14-17 months after planting. Data collected were analyzed by discriminant function. Results showed that there are four characters being able to distinguish two varieties of Coffea arabica ( Kartika 1 and 2) namely: total number of branch/plant, number of internode/branches, number of bunch/ branch, and dry weight of fruit. The total number of branch/plant, number of bunch/branch, and dry weight of bean of Kartika 1 were higher than those of Kartika 2, while the number of internode/branches was lower. These fourth characters were significantly able to distinguish the two varieties of coffee with 82.5% validity rates. This result was based on GxE theory and may have implications for improvement of productivity and quality of coffee, for future study

Prospek Pengembangan Agroforestri Berbasis Kopi Di Indonesia

Prospects of Agroforestry Development Based on Coffee in IndonesiaLimitations of agricultural land to encourage people/ farmers open up new land in forest areas, by felling tree forests and forcing open plants and burning the remains of plants and shrubs as a result of land being serious critical. One effort to over come the problem is through the implementation of a coffee-based agroforestry systems. Role-based on agroforestry coffee farmers that have been developed, by farmers involve on (1) Conserve land, water and biodiversity, (2) Add of nutrients lands, (3) Control of microclimate, (4) Add of carbon stocks (5) Suppress pests and diseases, and (6) Enhancement to the income of farmers. Coffee-based agroforestry has been practiced by farmers in various regions in Indonesia, including in West Lampung (patterns of community forestry and forest villages), West Java and Central Java (forest management with communities). Challenge/problems encountered in the coffee-based agroforestry include (1) The level of knowledge of farmers on the cultivation of coffee-based agroforestry still low, (2) Lack of venture capital and (3) The uncertainty of the status of business land. Efforts to overcome these problems can through training and mentoring cultivation technology, venture capital assistance and legal certainty of land status. Development direction of coffee-based agroforestry can be done conduct of region-owned Perum Perhutani, community forestry (CF) and village forest (VF) which covers each 2.250.172; 2.500.000 and 500.000 ha. This paper aims to identify the role of coffee-based agroforestry on the environment, and the economy of farmers and development prospect in Indonesia