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INDONESIA
Jurnal Agroteknos
Published by Universitas Halu Oleo
ISSN : 20877706     EISSN : 25274074     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Arjuna Subject : -
Articles 154 Documents
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PERBAIKAN DAYA ANTAGONIS TRICHODERMA HARZIANUM RIFAI TERHADAP SEPTOBASIDIUM Spp. MELALUI SINAR UV SUSWANTO, IMAN; RAMADHAN, TRIS HARIS
Jurnal Agroteknos Vol 4, No 3 (2014)
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Abstract

Currently velvet blight Septobasidium spp. is a major disease of pepper in West Kalimantan. Some control efforts have been made despite lack of satisfactory results. This study aimed to obtain mutant isolates of Trichoderma harzianum which can suppress velvet blight. Mutation was done by UV radiation from the UV-C lamp 15 watt, at range 3-21 minutes exposure series with an interval of 3 minutes. The research results showed that exposure to T. harzianum for 6-9 mins resulted in quicker life cycle of the mutant isolates and still maintain antagonistic properties against Septobasidium spp. UV exposure to T. harzianum more than 18 minutes caused disruption of mycelium growth and sporulation
PARTISI FOTOSINTAT BEBERAPA KULTIVAR KEDELAI (Glicine max. (L.) Merr.) PADA ULTISOL -, SARAWA; BACO, ABDU RAHMAN
Jurnal Agroteknos Vol 4, No 3 (2014)
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Abstract

Soybean (Glycine max (L.) Merr.) is a legume plant that has high economic value containing 20 % fat and 40 % protein. Soybeans are used in a variety of industries, both for food industry and for livestock feed. This research aimed to determine the partition of photosynthates of some soybean cultivars on Ultisol of Poasia, Anduonohu in 2013. The experiment was conducted using polybags filled with 15 kg top soil that had been dried for 2 days. The experiment was conducted using 10 treatments (cultivars) and repeated 3 times so there were 30 experimental units. Each experimental consisted of 12 polybags so there were 360 polybags. Four seeds were sown in each polybag, and thinning was performed at the age of 2 weeks and left only two crops to grow. The research results showed that each cultivar has different photosynthate partitioning. In general, all cultivars provided the highest photosynthate partitioning to leaves and stems until the age of 75 day after planting during the vegetatif phase and into flowers and pods on the generatif phase. Burangram cultivar provided the highest photosynthate partitioning into the pods followed by cultivars Argomulyo, Grobogan, and Kaba.
DETEKSI DAN PENGHITUNGAN KERAPATAN INOKULUM Phytophthora capsici DALAM TANAH DENGAN MENGGUNAKAN UMPAN DAUN LADA BANDE, LA ODE SANTIAJI; HADISUTRISNO, BAMBANG; SOMOWIYARJO, SUSAMTO; SUNARMINTO, BAMBANG HENDRO
Jurnal Agroteknos Vol 4, No 3 (2014)
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Abstract

Phytophthora capsiciis a causal agent for footrot disease in pepper and classified as a soil-borne pathogen. The inoculums of P. capsici in the soilis difficultto detect. The dynamics of P. capsici population in the soil is frequently and rapidly fluctuates and hard to detect, causing the pathogen to produce disease rapidly. The aimsof this research were todetect the pathogen P.capsici using black pepper leaf baiting and to quantify the inoculum of the pathogen P.capsici in the soil belonging to several disease intensities of the black pepper foot rot in the field. The first experiment: detecting the pathogen P. capsici using black pepper leaf baiting in the soil artificially infested using several sporangia, anda second experiment: quantification of propagul of the P.capsici in various categories of intensity on the black pepper foot rot disease in the field. The research results showed that the black pepper leaf baiting could be used to detect the existence of the propagul of P.capsiciin the soil artificially infested in various densities of sporangia.  The increase in disease intensity occurred in parallel with the greater density of P. capsici inocula in soil. The density of P. capsici inocula in the soil tended to decline when the disease intensity reached the highest level.
EVALUASI KESESUAIAN LAHAN UNTUK TANAMAN KOPI, KAKAO, DAN JAMBU METE DI KECAMATAN MORAMO UTARA KABUPATEN KONAWE SELATAN -, M. TUFAILA; -, ALIYAMAN; GINTING, SAHTA; ALAM, SYAMSU
Jurnal Agroteknos Vol 4, No 3 (2014)
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Abstract

This study aimed to determine the level of land suitability for cultivation of coffee, cocoa and cashew on the Experimental Farm of Halu Oleo University in the District of North Moramo, South Konawe. The method used in this research was the method of soil survey aimed to obtain data on soil characteristics. Land suitability evaluation was done by using the method of matching between the land characteristics and the eligibility criteria to grow crops that will be developed.  Results on actual land suitability for coffee crop was quite suitable (S2) with a land area of 149.6 ha, marginally suitable (S3) with total area of 101.06 ha and not suitable (N) with 3.01 ha land area; whereas for cocoa and cashew plants was marginally suitable (S3) with total area of 246.21 ha and not suitable (N) with 7.46 ha land area. Potentially, coffee plants were quite suitable (S2) with a land area of 213.65 ha, marginally suitable (S3) with a land area of 37.01 ha and not suitable (N) with 3.01 ha land area; cocoa plants were marginally suitable (S3) with a land area of 250.76 ha and not suitable (N) with 3.01 ha land area while cashew plants were quite suitable (S2) with a land area of 246.21 ha, marginally suitable (S3) with 4.45 ha land area and not suitable (N) with 3.01 ha land area.  Factors limiting plant growth were rainfall, air temperature, air humidity, soil depth, slope and erosion.  Management action carried out for the limiting factors erosion and slope was by land conservation, for the limiting factor of rainfall was by irrigation system settings and no management actions coul be done for the limiting factors of air temperature, humidity and soil depth because the limiting factors are permanent.
ISOLASI DAN KARAKTERISASI BAKTERI MANOLITIKASAL BONGGOL POHON SAGU WAHYUNI, SRI; -, LIANTO; KHAERUNI, ANDI
Jurnal Agroteknos Vol 4, No 3 (2014)
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Abstract

Sago 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 PEMUPUKAN KALIUM DENGAN APLIKASI JERAMI PADI TERHADAP PERTUMBUHAN DAN PRODUKSI PADI SAWAH PADALAHAN SAWAH BUKAANBARUDI KABUPATEN BUTON, SULAWESI TENGGARA -, ASMIN1; -, LA KARIMUNA
Jurnal Agroteknos Vol 4, No 3 (2014)
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Abstract

Productivity 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.
PERTUMBUHAN TINGGI TANAMAN SAMBILOTO (Andrographis paniculata. Ness) HASIL PEMBERIAN PUPUK DAN INTENSITAS CAHAYA MATAHARI YANG BERBEDA MALIK, NURHAYU
Jurnal Agroteknos Vol 4, No 3 (2014)
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Abstract

This study aimed to evaluate the effect of fertilization and different light intensities on growth of plant height of bitter plant (Andrographis paniculata Ness). The study was conducted using Completely Randomized Design (CRD) with 3 x 3 factorial pattern. The main factor was fertilization treatment consisted of three levels: NPK (Urea 1.2 grams per plant, TSP 2.4 g per plant and KCl 0.6 g per plant), animal manure (1.2 kg per plant) and without fertilization. The second factor was the different light intensities consisted of three levels: full light intensity, half-shade and full shade. Each treatment combination was repeated 3 times. Growth of plant height was observed 1 and 2 months after application of fertilizer and light intensity. Data were analyzed using the Analysis of Variance (Anova).The research results showed that bitter plant height differed at fertilization levels and different light intensities. NPK fertilization combined with 40 % light intensity (P2N1) gave the highest plant height.
UJI KISARAN INANG POTYVIRUS PENYEBAB MOSAIK NILAM (Pogostemon cablin (Blanco) Benth) ASAL SULAWESI TENGGARA HASAN, ASMAR; TAUFIK, MUHAMMAD; -, GUSNAWATY HS; -, SARAWA
Jurnal Agroteknos Vol 4, No 3 (2014)
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Abstract

The objective of the research was to determine the host alternate of Potyvirus in Southeast Sulawesi using a host range technique. Observed variables were incubation period, disease incidence, and variation symptom. The research results showed that virus isolates could be mechanically transmitted to melon plant (Cucumismelo) but showing no external symptoms while on tomato (Solanum lycopersicum), long-beans (Vigna sinensis), tobacco (Nicotiana tabacum and Nicotiana benthamiana), swamp-land (Ipomoea reptana), red-amaranth (Alternantheraamoena), chili (Capsicum annum), and egg plant (Solanum melongena) so far the existence of the Potyvirus could not be detected after mechanically inoculated.
INDUKSI TUNAS GADUNG (Diocorea hispida Dennst) SECARA IN VITRO ARIF, NORMA; ANSI, AZHAR; WIJAYANTO, TEGUH
Jurnal Agroteknos Vol 4, No 3 (2014)
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Abstract

Yam (Dioscorea hispida Dennst) is a tuber crop that belonges to food sources and has not been widely recognized by the public. Aside from being a food ingredient, it can also be used as a natural pesticide. Until now, efforts to use the potential of yam have not been handled well. This research was conducted at the In vitro Laboratory of the Faculty of agriculture, Haluoleo University, from May to July 2014. The purpose of the study was to obtain the proper concentration of BAP to induce yam plant shoots in vitro. The research design used was a completely randomized design with 5 replications. One segment of the stem explants were grown on MS basic medium with different concentrations of BAP (0.5-4 ppm), with 5 replications and each replication consisted of 1 bottle containing 2 explants. Data were analyzed using Duncan's Multiple Range Test (DMRT). The research results showed that the addition of various concentrations of BAP affected the span of the emergence of the first shoots but did not affect the percentage of explants alive and growing shoots. BAP concentration of 2 mg / L was the optimal concentration to induce shoots of yam (Dioscorea hispida) with a span began to shoot appearance at week 4 after planting.
ANALISIS PERUBAHAN PENGGUNAAN LAHAN DAN KETERSEDIAAN SUMBERDAYA AIR DI DAS KONAWEHA PROPINSI SULAWESI TENGGARA MARWAH, SITTI
Jurnal Agroteknos Vol 4, No 3 (2014)
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Abstract

Phenomena of depleting of water resources and increasing water demand have been occurring in Konaweha watershed. Combine with other degraded conditions, Konaweha watershed have been categorized as priority watershed in Southeast Sulawesi Province. Land use change is the main factor to influence water balance that indicated by the increasing maximum discharge in rainy seasons and decreasing minimum discharge in dry seasons. The objective of this research were (1) to analize the effects of land use changes onwater resources of Konaweha watershed; (2) to analize the availability of water resources to meet water demand as well as minimum proportion of forest cover in the watershed to ensure sustainable water resources in Konaweha watershed. This research was conducted in Konaweha watershed for 7 months from July 2011 to February 2012.  The result of this research showed that forest, swamp, plantation and bush area tended to decline exponentially year by year. The decline of forest area have significantly decreased minimum discharge of Konaweha River in dry seasons and increased maximum discharge in rainy seasons.  These condition have caused a significant deficit of water resources in dry seasons since period of 2004 to 2010 eventhough there was no deficit of annual water resources.

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