Jurnal Lahan Suboptimal : Journal of Suboptimal Lands
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Kegiatan Agronomis untuk Meningkatkan Potensi Lahan Lebak menjadi Sumber Pangan
No full textAgronomical Activities to Increase the Potential of the Swampy Land To Be Food Sources. Swampy land is potentially large enough to increase the production of food crops and holticulture. Out of the land area of about 13.2 milion hectares, only about 5 percent has been used intensively. The main problems in land use is the water system and soil fertility. Agronomic activities that can be done to improve the productivity of the land, among others, are improving the water system control, soil amelioration, cropping patterns and use of improved varieties. These activities can increase the production of food crops and holticulture. These activities should be carried out by considering environmental sustainability
Oil Palm Fruit Bunch Yield Fluctuation between Dry and Rainy Season in Dry and Wetland
No full textThe objective of this research was to study how much yield difference of fresh fruit bunch of oil palm between dry and rainy season, and whether the yield difference much in dry land compare with wetland. The research was conducted in Entisol of PTPN VII Betung, and in Ultisol of PTP Hindoli, both in Sungai Lilin Regency. Yield data used in this study was data of year 2007−2010. Rainfall data during 2007−2010 showed no absolute dry month during dry seasons. The result of the study indicated that yield in dry land higher than in wetland either in dry season or in rainy season. Yield fluctuated between dry and rainy season either in dry land or in wetland. But, yield in rainy season did not consistently higher than in dry season. It was concluded that oil palm yield was influenced not only by soil water supply and rainfall quantity, but also internal and many other external factors
Aplikasi Ekstrak Kompos Meningkatkan Hasil dan Menekan Penyakit Padi Sistem Ratun di Sawah Pasang Surut Kabupaten Banyuasin
No full textSuwandi et al. 2012. Application of Extract Compost Increased Yield and Suppressed the Diseases of Ratoon Rice Crop in Tidal Swamp of Banyuasin Regency. JLSO 1(2):116-122.A field study was conducted to test the effects of the biofertilizer preparations on yield and diseases of ratoon rice crop in the reclaimed tidal swamp of Telang II, Banyuasin Regency of South Sumatra. The biofertilizer were prepared either as dormant inoculant in liquid formulation or active inoculant in compost extract. Both preparations contain chitinolytic, cellulolytic and phosphate solubilizing bacterial community. The result showed that the yield of ratoon crops of Ciherang rice variety in the suboptimal land increased by 67% (923 kg/Ha) in response to single spraying of the compost extract. The ratoon sprayed with the compost extract had a lower incidence of neck blast and panicle blight and produced less empty grains compared to non-sprayed control. The application of extract compost appears to be a feasible method for increasing production of ratoon rice in tidal swamps
Characteristics and Management of Peatland for Agricultural Development
No full textRatmini, 2012. Characteristics and Management of Peatland for Agricultural Development. JLSO 1(2):197-206 The potential of peatland as agricultural land has area of about 6 M ha. The utilization of peatland in agriculture need detail and thorough planning, adequate technology application, and proper land management because its marginal and fragile ecosystem. Peatland is vulnerable to land degradation, namely physical degradation (subsiden and irreversible drying) and chemical degradation (nutrients deficiency and nutrients toxicity). The peatland development has obstacles such as highly content of organic acids. The effect of organic acid toxicity can be reduced by water (irrigation technology) management and adding ameliorant which rich of polivalent cation such as Fe, Al, Cu, and Zn. Soil amendment and fertilization in peatland farming can be done to reduce nutrients deficiency
Keanekaragaman Komunitas Artropoda Predator Tanaman Padi yang Aplikasi Boinsektisida Berbasis Jamur Entomopatogen Daerah Rawa Lebak Sumatera Selatan
No full textSpecies diversity and abundance of canopy-inhabiting and soil-dwelling arthropods could be affected by pesticide application. Population and the intensity of the rice stem borer attack can influence pesticide application. This study aimed to examine the effect of the application of solid and liquid bio insecticide entomopathogenic fungus Beauveria bassiana-based formulations on species diversity and abundance of predatory arthropods in inhabiting paddy canopy and soil dwelling. The research was conducted in fresh-water swamp rice cultivation in Pelabuhan Dalam village, Pemulutan district, Ogan Ilir regency in South Sumatra, from Mei to Agustus 2012.  The results showed that the application of liquid and solid bioinsecticida affected predatory arthropods diversity (H') at rice plant canopy. The highest effect was found in rice plant applied with liquid bio insecticide and the lowest effect with synthetic insecticides. Predatory arthropods diversity (H') in soil dwelling  was the highest in rice plants applied with solid bioinsecticide and the lowest with synthetic insecticide
Perbedaan Waktu Hauling Bagan Tancap terhadap Hasil Tangkapan di Perairan Sungsang, Sumatera Selatan
No full textAnchovies (Stolephorus sp.) were the target species of stationary lift nets in Sungsang estuary of South Sumatra including others small pelagics. Fishermen of stationary lift net in Sungsang estuary operated before midnight until early morning. In order to obtain optimum catches, it was necessary to know when the right time to operate the stationary lift nets. The research objectives were 1) to analyze the effect of hauling time on the catch, and 2) to determine the optimum hauling time of stationary lift net in Sungsang estuary. The research was conducted in May 2012 with Experimental Fishing methods and completely random design models with treatment differences in hauling time was before midnight (21:00 to 23:59), around midnight (00:00 to 02:59), and after midnight (03:00 to 5:59). The fourth stationary lift net was operated for 3 days (3 trips). All data were processed using SPSS 17 software for windows. The results indicated that the hauling time significantly affected the catch and the optimum hauling time of stationary lift net in Sungsang estuary was around midnight (00:00 to 02:59)
Pengaruh Tumbuhan Liar Berbunga terhadap Tanaman Tebu dan Keberadaan Parasitoid di Pertanaman Tebu Lahan Kering, Cinta Manis Sumatera Selatan
No full textSugarcane is one of commodity plants that can grow well in dry land. Sugarcane plantation area at Cinta Manis is approximately 25,000 hectares. The purposes of this study were to determine the effect of wild flowering plants on sugarcane and the presence of parasitoids. This study was conducted in PTPN VII Cinta Manis South Sumatra, from February to September 2012. The results indicated that wild flowering plants in Cinta Manis sugarcane plantations consisted of 28 families and 91 species. Observation and identification of wild flowering plants conducted on 1 ha plot obtained as many as 23 species, 8 of which are the most dominant species, namely Borreria alata, mitracarpus hirtus, Cyperus tunuiculmis, Cyperus plavipus, Richardia brasiliensis, Cleoma rutidosperma, Ageratum conyzoides, and  Spermacoce remota. The presence of wild flowering plants had no effect on weight, length, diameter and number of segments of sugarcane. Number of egg parasitoids of sugarcane pests found on land with and without the wild flowering plants as much as 1,489 and 1,508 pieces respectively. Number of parasitoids larvae were found on the land with and without the wild flowering plants as much as 343 pieces and 234 pieces respectively
Resistance of Several Varieties of Non-Tidal Lowland Paddy to Sheath Blight Disease Caused by Rhizoctonia solani
No full textMuslim et al. 2012. Resistance of Several Varieties of Non-Tidal Lowland Paddy to Sheath Blight Disease Caused by Rhizoctonia solani. JLSO 1(2):163-169. The use of high yielding varieties has increased paddy yields in non-tidal lowlands. However, paddy productivity often decreases due sheath blight disease caused by Rhizoctonia solani. The objective of this study was to determine some non-tidal swamp rice varieties that are resistant to sheath blight. Response of paddy varieties to sheath blight  was evaluated in the screen house using micro-chamber screening method, with paddy variety as treatment. Each treatment consisted of five varieties of paddy: Inpari13, Indragiri, Mekongga, Inpara3 and Ciherang. The result showed that all of the varieties were infected by R. solani.The lowest level of severity occurred in Inpara 3 with the average score of 38.88% whereas the highest severity occurred in Indragiri varietiy with the average score of 59.34%. Based on resistancy, none of the varieties tested showed resistant response. Moderately resistant response to sheath blight was indicated by Inpara 3, Mekongga, Ciherang (disease index 3.5-4.0); whereas susceptible response was demonstrated by Inpari 13 and Indragiri (disease index 5.3-5.5). The average incubation period of the pathogen R. solani on Inpari 13, Indragiri and Mekongga was four days, Ciherang was five days and Inpara 3 was six days. Therefore, none of the five varieties of non-tidal lowland paddy tested in this reasearch was resistant to sheath blight disease caused by R. solani
Bamboo Floated-cultivation Model for Upland Kangkong (Ipomoea reptans Poir.) in Tidal Lowland Area
No full textBernas et al. 2012. Bamboo Floated-cultivation Model for Upland Kangkung (Ipomoea reptans Poir.) in Tidal Lowland Area. JLSO 1(2):177-185. South Sumatra Province has a high potential of swampland for expansion of floating agriculture system. Swampland in Palembang, for instance, can be adapted for floating vegetable cultivation. The experiments on floating agricultural system have been done by using wasted plastic glass, bamboo for rice and glutinous rice with the application of Hycinth and water Fern compost. The purpose of this research was to build bamboo rafts which were suitable for growing kangkong (Ipomoea reptans). Previous rafts which contained water saturated soil for rice growing needed to be adjusted for kankong cultivation which prefer unsaturated soil. Two bamboo rafts were built using four plastic containers in bottom corners.The first raft was filled with soil plus compost (ratio 1:1) and the other was filled only with swamp soil. Kankong seeds were planted with the distance of 25 cm by 25 cm. Data were collected weekly and analysed statistically using t-test. Results showed that when the rafts were supported by two bamboos, plants were died due to excessive water. Plants grew well after the rafts were supported by plastic containers.  Composting significantly increased plant height, number of leaves, plants fresh and dried weight. Plant height treated with compost was 38 cm compared to that without compost treatment which was 28 cm. Fresh plant weight was 149 g/bunch with compost treatment and 25 g/bunch without. Thus, low fertility of swamp soil only required compost to increase nutrients content for plant growth.This research concluded that plant can be cultivated cheaply and environmentally safe in swampland. Further experiments such as replacing plastic container in raft construction and growing other vegetables on the raft were proposed
Pertumbuhan dan Hasil Padi pada Inseptisol Asal Rawa Lebak yang Diinokulasi Berbagai Konsorsium Bakteri Penyumbang Unsur Hara
No full textThe aim of this research was to study the effect of multisynergism bacterial isolates growth of rice plants as well as to obtain best composition of endophytic bacterial isolates, Azotobacter, Azospirilium and phosphate solubilizing bacteria in spurring growth of rice plants. This research was conducted in October 2012 to February 2013. This study arranged in a completely randomized design (All treatments of multiple bacterial isolates resulted in increase of soil N x P Content). The results showed that multibacterial isolates B (endophytic bacteria + Azospirillum) increased vegetative and generative growth of rice plants. Treatment G (composition of endophytic bacterial isolates, Azotobacter, Azospirilium and phosphate solubilizing bacteria) can increase rice yields. Some soil N and P content increased in response to all treatments of multiple bacterial isolates. The similar result was also observed in the N and P uptake that some multiple bacterial isolates improved N and P uptake of plant