Jurnal Agroteknos
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APLIKASI KOMPOS KOTORAN AYAM UNTUK MENINGKATKAN HASIL TANAMAN MENTIMUN (Cucumis sativus L.) DI TANAH MASAM
Full text linkThe purpose of this study was to determine the ability of composted chicken manure to improve cucumbers yields in acid soils. The research was conducted in the Bende Village, District of Kadia, Kendari, from October to December 2013. Soil analysis was performed at the Soil Science Unit of Agro Technology Laboratory Faculty of Agriculture, University of Halu Oleo. This study was prepared using randomized block design (RBD) with a single factor of chicken manure compost treatment, consisting of 6 levels and repeated four times. The treatments were : without composted chicken manure (D0), manure dose of 5 ton ha-1 (D1), manure dose 10 tons ha-1 (D2), manure dose of 15 tons ha-1 (D3), manure dose of 20 tons ha-1 (D4) and manure dose of 25 tons ha-1 (D5). Observed variables included: growth and crop production, analysis of soil chemical properties, as well as the analysis of the quality of the fertilizer used. Data were analyzed using analysis of variance followed by Duncan's Multiple Range Test. The results showed that the use of chicken manure compost at a dose of 15 tons ha-1 (D3) gave the best effect on the growth and yield of cucumber in acid soils. Keywords: acid soi,l chicken manure compost, cucumber crop
ISOLASI DAN KARAKTERISASI BAKTERI MANOLITIKASAL BONGGOL POHON SAGU
Full text linkSago Processing in Southeast Sulawesi often generate waste in the form of pulp and tuberswhich contains lignin, cellulose, starch, minerals, and vitamins that can be used as a source of carbon and energy for growth of microorganisms, so it is likely to get microbes, including mannolitic bacteria that are useful for human life. The aim of this study was to isolate and characterize the biochemical properties of mannolitic bacteria originated fromwaste of sago hump in Konawe, Southeast Sulawesi Province. Isolation was done using serial dilution method and then spread over the surface of Nutrient agar medium and Mannan enrichment. Bacterial isolates showing high mannose activity were characterized mannose physiologically and biochemically. From this research, 6 mannolitic isolates originated from hump of sago waste samples from South Konawe were obtained. BLS.11-01 and BLS.11-02 mannolitic bacterial isolates had a strong mannolitic activity, with mannolitic index value of 2.3 and 2.0, respectively. Presumably, the two isolates were gram-positive bacteria, belonging to the same genus
KAJIAN POTENSI RIZOBAKTERI PEMACU PERTUMBUHAN TANAMAN YANG DIISOLASI DARI RIZOSFER PADI SEHAT
Full text linkThe experiment was carried out to characterize the ability of rhizobacteria isolated from the rhizosphere of healthy lowland rice in dissolving phosphate or fixing nitrogen. The research was conducted from February to June 2011 at Agronomy Laboratory, Agriculture Faculty, Halu Oleo University. The experiment was arranged based on descriptive methods. Overall, the number of isolates characterized were 40 isolates. The results of the isolate characterization were documentated with specific indicators (eg. the ability to dissolve phosphate in the form of halo/clear zone). The research indicated that most of these isolates had the ability to dissolve phosphate and fix nitrogen. Isolates PKNW 6, PKMN 7, PKNS 3, PKNS 9 and PKNW 4 showed better ability in dissolving phosphate and fixing nitrogen than other isolates evaluated. Further studies are still needed for the development of the potential isolates as biological agensts or biofertilizer. Keywords: healthy rice rhizosphere, rhizobacteria, fix nitrogen, dissolve phosphat
KAJIAN PEMUPUKAN KALIUM DENGAN APLIKASI JERAMI PADI TERHADAP PERTUMBUHAN DAN PRODUKSI PADI SAWAH PADALAHAN SAWAH BUKAANBARUDI KABUPATEN BUTON, SULAWESI TENGGARA
Full text linkProductivity of paddy rice in paddy field in the newly openedland is generally very low due to the low levels of soil fertility and high content of iron that is toxic to plants. Fertilization and appropriate amelioration is needed to improve and increase the productivity of paddy rice. The purpose of this study was to analyze the effect of the combination of K fertilization and rice straw on growth and yield of paddy rice and economic feasibility of the wetland new openings, and to obtain the proper dosage for hay substituting K fertilizers in paddy fields of new openings. This study was conducted on farmers' fields in the hamlet Aweli,Wakangka village; subdistrict Kapuntori, Buton, Southeast Sulawesi, which was performed from June 2012 to December 2012.The experiment was arranged in a randomized block design with eight treatments and three replications. The treatments were seven straw combinations with K fertilization rate based on the results of soil analysis (HCl extract 25%) coupled with the control (the farmers’ method). The treatments were as follows: (1) 100 kg KCl without rice straw; (2) 75 kg KCl ha-1+ rice straw 2.5 t ha-1; (3) 50 kg KCl ha-1+ rice straw 5 t ha-1; (4) 25 kg KCl ha-1+ rice straw 7.5 t ha-1; (5) 0 kg KCl ha-1+ rice straw 10 t ha-1; (6) 75 kg KCl ha-1 + rice straw compost 1.0 t ha-1; (7) 75 kg KCl ha-1 + 1.0 t manure ha-1; and (8) 0 kg KCl ha-1 + 1.0 t manure ha-1 (Farmers’ method.The research results showed that the rice straw 2.5 t ha-1 reduced the need of KCl, from 100 kg ha-1 to 75 kg ha-1 and effectively increased grain yield. Provision of 10 t of rice straw can substitute potassium fertilizer application and the results obtained did not differ significantly with administration of 100 kg KCl ha-1, while effectively reducing the level of iron poisoning. Wetland management of technological innovation of new openings by using rice straw with Potassium fertilization increased the yield of paddy and increased the value of the RC ratio of 1.9 to 2.1-3.1, or the value of BC ratio increased to 2-12 times fold higher compared with the treatment of farmers’ method.The highest profits obtained in the application of 75 kg KCl fertilizer ha-1 in combination with rice straw 2.5 t ha-1was in the amount of Rp. 11.597 million ha-1, followed by potassium fertilization with 100 kg KCl ha-1 without straw, and treatment of 0 kg KCl + 10 t rice straw ha-1, Rp.9.951.000 ha-1 and Rp.9.645.000 ha-1, respectively