Respon Pertumbuhan Dan Produksi Rosella (Hibiscus Sabdariffa L.) Pada Tanah Salin Dengan Pemberian Asam Salisilat Dan Giberellin (Ga3)

Penelitian ini bertujuan untuk mengevaluasi respon pertumbuhan dan produksi rosella (hibiscus sabdariffa L.) pada tanah salin dengan pemberian asam salisilat dan giberellin (GA3). Penelitian ini dilakukan di rumah kaca, Fakultas Pertanian, Universitas Sumatera Utara, Medan, pada Februari 2014 sampai Juni 2014. Penelitian menggunakan Rancangan Acak Lengkap (RAL) dengan 3 (tiga) factor dan 3 (tiga) ulangan. Faktor pertama giberellin (GA3) dengan dua taraf yaitu 0 mg L-1, 5 mg L-1. Faktor kedua asam salisilat dengan tiga taraf yaitu 0 mM, 0,5mM, 1 mM. Faktor ketiga tingkat salinitas dengan 2 taraf yaitu 0 dsm-1 dan 4-5 dsm-1. Hasil penelitian menunjukkan bahwa interaksi antara giberellin dan cekaman salinitas memperlihatkan pengaruh nyata pada peubah pertumbuhan seperti persentase perkecambahan, tebal kutikula dan betakaroten. Interaksi antara perlakuan asam salisilat dan cekaman salinitas memperlihatkan pengaruh nyata pada tebal kutikula dan betakaroten. Interaksi tiga factor perlakuan giberellin, asam salisilat dan cekaman salinitas menunjukkan pengaruh yang nyata pada peubah tebal kutikula dan betakaroten

Auxin Hormone Analysis for Clones of Immaturity Rubber Plant

One of the problems of immature rubber plants are non-productive period is too long which is about 5-6 years old. Various efforts have been made to speed up non-productive period, including the application of exogenous growth regulators. This is related to biological natural hormones found in plantduring immature rubber. One of the hormones that affects the auxin hormone . This study aims to analyze content auxin hormone found in some clones and plant age during immature rubber. This research was conducted descriptive / review directly to the field by taking leaf samples at the clones PB 260, PB 340 and RRIM 712 which have been determined. To determine the levels of hormones contained in rubber leaf, leaf samples were analyzed at the Research Center for Biology Indonesian Institute of Sciences in Bogor. Observation auxin hormone levels. The results showed that the type clones and different plant age have different content auxint. The highest content of auxin there at the age of 2 years is the plant on clones PB 260 (116.5 ppm) and RRIM 712 (114.0 ppm)

Uji Toleransi Beberapa Varietas Padi (Oryz

The objective of this study is to have a reliable variety to extend on an used cultivated land. Thisresearch was carried out on an used cultivated land as fish pond with salty sulfate contained onKecamatan Percut Sei Tuan in a height site ± 2 m asl with its coastal far distance ± 1 km, has DHL6.5 - 6.8 and pH 4.1 – 4.6. The research adopted group random design with 18 varieties of rice asplant to test. The parameter to analyze such as height of plant, number of saplings, number ofproductive saplings, length of grains, numbers of grains, number of decomposed grains, grainsproduction and wet weight and dried weight of roots.The result of research indicated amongst different of varieties as tested showed a significantdifferent on all parameter as analyzed. Out of 18 varieties that has been tested were found 12varieties survivable, whereas the varieties prospective to extend on the used cultivated land locationwith salty sulfate such as Banyuasin, Dendang, Siak Raya, Punggur and Lambur regions

Morphology of Leaves and Content of Secondary Metabolites Asiaticoside in Some Accession of Pegagan (Centella Asiatica L. Urban) in North Sumatera

The objectives of this experiment was to observe morphology of leaves and content of asiaticoside in some accessions of Centella asiatica of lowland Sumatera Utara, Medan and Pantai Labu Deli Serdang and the highlands of Sumatera Utara, Berastagi, Kabanjahe and Samosir. The study also examines the link between altitude grow with the content of asiaticoside of Centella asiatica. Domestication research include: exploration and collection. This activity is carried out to collect Centella asiatica from different geographic locations with different altitudes. Later examination asiaticoside levels in the leaves of Centella asiatica by HPLC method and phytochemical test. Analysis of soil at all growing places were also conducted. The highest content of asiaticoside in accessions of Centella asiatica tested is as follows accession Deli Serdang (2.38%), Kabanjahe (1.43%), Medan (1.38%), Berastagi (1.38%), Samosir with shade (0.28%) and accession Samosir (0.24%). Altitude does not affect the content of asiaticoside Centella asiatica because in this study obtained the highest asiaticoside content found on lowland accessions namely (± 4 m asl), namely accession Pantai Labu Deli Serdang (2.38%)

Kajian Naungan, Taraf Pupuk Urea Dan Varietas Kedelai (Glycine Max L.) Terhadap Pertumbuhan Dan Produksi Tanaman Kedelai Sebagai Tanaman Sela Di Areal Pertanaman Kelapa Sawit Menghasilkan

The aims of this research was to analyze morpo_physiology changing of soybean under oilpam area; determine effect of shading and N fertilizer dosage on the growth and yield of soybean under oilpam area; and determine suitable soybean varieties that enable grow and produce under oilpalm.The experiment located in Ujung Labuan Village, Deli Serdang District. The experiment was arranged in Split-split Plot Design 3 x 4 x 3 with 3 replication, with three factors observed: 1) shade level, consist of: under 4 years old oilpam, under 6 years old oilpam, open area, 2) N dosage,: 200 kg urea/ha, 150 kg/ha, 100 kg urea/ha, 0 kg urea/ha, 3) soybean variety: Anjasmoro, Burangrang, and Grobogan. Plant height, leaf area, plant dry weight, and soybean production were determined. Result showed there were some significant effects of interaction factors between oilpalm canopy shading, N dosage and soybean variety on growth and yield of soybean. The highest growth and production of soybean found at open area. Between 4 years old oilpam and 6-7 years old oilpam, soybean growth and production are unsignificant different, and lower than those on opening area. N dosage make some significat effects on growth and yield of soybean, which is usually nonsignificant between 150 kg Urea/ha or 200 kg Urea/ha. Meanwhile soybean variety make some significat effects. At open area, burangrang make the highest growth and production by application of 200 kg urea/ha, but under oilpalm the highest production found at Burangrang under 4 years old oilpalm and application of 200 kg urea/ha, followed by several treatments which are unsignifican different

Pengaruh Jenis Dan Lama Perendaman Krioprotektan Terhadap Viabilitas Benih Rosella (Hibiscus Sabdariffa L.) Secara Kriopreservasi

Cryopreservation is a technique for long-term storage nuftah plasma. In this technique cells and meristem or other parts of plants were frozen and stored in liquid nitrogen at a temperature -196°C. The objective of the reseacrh was to know effects of type and duration of soaking cryoprotectant on the viability of roselle seed in cryopreservation. This research was conducted at the Laboratory of Seed Technology Faculty of Agriculture, University of North Sumatra, Medan with a height ± 25 meters above sea level, from September to October 2014, using a randomized block design with 2 factors. The first factor is the type of cryoprotectant with 4 type of PVS1 ; PVS2; PVS3; PVS4 and the second factor of soaking cryoprotectant with 3 levels of 60 minutes; 90 minutes; 120 minutes. Parameter observed were the rate of germination (day), normal seedling (%), abnormal seedling (%), seeds die (%), vigor index, fresh weight of seedling (g), dry weight of seedling (g). The results showed soaking treatment of various types of cryoprotectant significant effect on the observation parameters the rate of germination (day), normal seedling (%), vigor index, fresh weight of seedling (g) and dry weight of seedling (g). Treatment of soaking cryoprotectant significant effect on the observation parameters abnormal seedling (%) and vigor index. Interaction type and duration of soaking cryoprotectant significant effect observation parameters on the rate of germination (day) and vigor index