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Jurnal Lahan Suboptimal
Published by Universitas Sriwijaya
ISSN : 22526188     EISSN : 23023015     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Jurnal Lahan Suboptimal: Journal of Suboptimal Lands (JLSO) (p-ISSN 2252-6188; e-ISSN 2302-3015) publishes original research papers, literature reviews, and short communications that cover on topics relevant to suboptimal lands: freshwater swamps, tidal lowlands, peatlands, dry and dry acid lands, shaded ecosystem, ex-mined lands, saline and marine coastal wetland ecosystems. The Journal serves as a multi-disciplinary forum covering key issues in Suboptimal Lands science and technology, management, policy and ecological economics. The journal is published by Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO), Universitas Sriwijaya. The journal was first published on April of 2012 with twice per year in frequency on April and October.
Arjuna Subject : -
Articles 669 Documents
 55   56   57   58   59 
Yield Components and Efficiency Index of Maize Yield: Relationship to Yields in Tidal Fields Yustisia Yustisia; NP Sri Ratmini; J Amirrullah; Y Juwita; YPAP Hutabarat; Atekan Atekan
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 10 No. 2 (2021): JLSO
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jlso.10.2.2021.522

Abstract

Identification of the advantages of hybrid maize lines is needed to support the increased production and development of maize in tidal fields. This study aimed to identify the agronomic characters and yield components of hybrid maize lines/varieties and their relationship with high yield and efficient fertilization in tidal fields.  The design used was a Split Plot with three replications. The Main Plot was a hybrid maize line/variety (L39/MR4, MGOLD/G8, G28/MGOLD, P27). The subplots were Composite Fertilizer with 2 measures, namely 600 kg/ha and 720 kg/ha. The fertilizers of Urea (50%), SP 36 and NPK (100%) were given at 10 days after planting (DAP). The remaining Urea was given at 30 DAP, 50% and 58.33% respectively in the Composite Fertilizer treatment of 600 kg/ha and 720 kg/ha. The technical culture applied was optimum tillage with the 70 cm x 25 cm spacing, the irrigation being carried out at D/DAP and 15 DAP, the optimal control on the weed and Plant Pest Organisms. The result showed that the number of rows/cobs was an alternative variable in identifying maize lines/varieties with high yield and efficient fertilization. This character was closely correlated with seed/ear weight (r = 0.94) and Grain Yield Efficiency Index/GYEI (r = 0.84). All Genotypes were nutrient efficient (GYEI > 1) except G28/MGOLD (IGYEI < 1). Another approach used to identify efficient fertilization lines/varieties was the variable percentage of yield reduction through regression equations with GYEI (y = - 0.0104 x + 1.0426).  The character of high number of rows/cob could be used as genetic material in plant breeding programs. The lines/varieties as a component of efficient technology and high productivity would contribute to increase production and development of maize in tidal fields.
Forward Problems Solving of Groundwater Flow using Stochastic Groundwater Vistas Method Pramudita Triatmojo; Mas Agus Mardyanto
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 10 No. 2 (2021): JLSO
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jlso.10.2.2021.525

Abstract

In the forward problems, the hydraulic head value can be found by knowing the value of the groundwater parameter. Parameters of groundwater such as hydraulic conductivity, vary over space due to the variation of aquifer properties. Consequently, it is difficult or almost impossible to treat these kinds of variability by a deterministic approach because there is no exact value to be used as input for a parameter. The objective of this research was to obtain a mathematical model of groundwater flow made with the Groundwater Vistas Program that is in accordance with the physical model. Mathematical modeling of groundwater flow using the Groundwater Vistas Program with a stochastic approach and Monte Carlo simulation method where the input data (hydraulic conductivity, hydraulic head) is obtained from the physical model. Results showed that the sum of squares value from the scatter plot diagram of all realization points had a very small value (close to or even zero). The residual mean diagram showed the error value of all realizations had a very low value close to zero. The calculated head value (computed) compared with the results of the observation had a fairly small difference value (ranging from 0.0006−0.009 m). These results were considered quite good because in modeling it is impossible to get modeling results that are exactly the same as those being modeled. The results show that Groundwater Vistas can be used for modeling with very small errors and it can estimate values of hydraulic heads quite well.
The Ethnobotany and Ethnomedicine of Zanthoxylum acanthopodium in Lake Toba, North Sumatra, Indonesia Cut Rizlani Kholibrina; Aswandi Aswandi
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 10 No. 1 (2021): JLSO
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/JLSO.10.1.2021.526

Abstract

Zanthoxylum acanthopodium is a nutritional plant utilized for both culinary and medicinal purposes. The herb, popularly known as andalimanis found in sloppy, barren, cultivated lands and secondary forests in Lake Toba, North Sumatra. This study aimed to provide an ethnobotanical description, productivity  and propagation, essential oil of andaliman and the application as traditional medicine in Lake Toba. Botanical characters were collected by observing phenology and distilling essential oils. The ethnomedicine information was collected through in-depth interviews with farmers and herbal practitioners, meanwhile, phytochemical content was identified based on various primary literature. Results showed flowering period occurs  from March until April and followed by fruiting in May to September. Fruits were widely processed as cooking spices for various cuisines. It played an important role in local people’s diet by supplying carbohydrate, minerals and vitamins. This ingredient was favoured for its citrus-colored oil content and a spicy taste with an appetizing aroma. This spice was also utilized in traditional medicine. Both dry and fresh fruits were used for gums and dental disorders as dyspepsia or lotion for scabies. Fresh roots were also used to cure dental problems. All plant plants contain essential oil with a higher concentration in fruits (4.89%). The local wisdom also reveals the essential oil utilization as an antimicrobial ingredient that could be further processed as a food preservative. To increase generative propagation, seed dormancy breaking treatment through a low-intensity burning can increase the germination rate.
Land Suitability and Agricultural Technology for Rice Cultivation on Tidal Lowland Reclamation in South Sumatra Momon Sodik Imanudin; Probowati Sulistiyani; M Edi Armanto; A Madjid; Anton Saputra
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 10 No. 1 (2021): JLSO
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/JLSO.10.1.2021.527

Abstract

Tidal lowland is one of the potential lands for agriculture that is found very widely in coastal areas of South Sumatra. There are about 400,000 hectares (ha) was reclaimed for agriculture purpose. However, in many parts, the rice production is still low (<3 ton/ha), mainly in the high part of hydrotopography class (Type C) that the tidewater could not possibly irrigate the land.  This study aimed to evaluate the level of actual and potential suitability of tidal swamps for rice plants. This research has been carried out in Bandar Jaya Village, Air Sugihan Subdistrict, Ogan Komering Ilir Regency. This research used a survey level method with very detailed (intensive) with a scale of 1:6,000 covering a research area of 16 ha. The results showed that actual suitability for rice plants in the study site is N-n with an area of 5 ha and N-f, n with an area of 11 ha with limiting factors of soil pH and P nutrient. The potential land suitability class for rice plants in the study location is S3-n with an area of 5 ha and S3-f, n with an area of 11 ha. Land quality improvement was done by using the lime application and control water table at a depth of at least 10 cm from the soil surface during rice growth.  Rainwater should be retained in the tertiary block as much as possible to fulfill crop water requirements. Setting the planting time (November-January) and balanced fertilization will be able to increase the land suitability class to S1 (highly suitable).
Characteristics of Farmers in Suboptimal Land Agroecosystems and the Implications of the Application of Farm Technology Suharyon Suharyon; Busyra B Saidi
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 10 No. 2 (2021): JLSO
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jlso.10.2.2021.528

Abstract

The area of West Tanjung Jabung District is dominated by tidal land agroecosystems so that the farming pattern that develops is based on tidal land. This research aimed to study the characteristics of farmers in tidal land agroecosystems and their implications for the application of farming technology. The research was conducted in Bunga Tanjung Village, Betara Subdistrict, West Tanjung Jabung District in 2019, involving 40 farmers who were randomly selected as respondents. The descriptive data analysis showed the first, farming on tidal land was characterized by the control of relatively unprocessed and cultivated farm land, low crop intensity of food commodities, and low levels of productivity resulting in unfulfillable farming results properly. The second, the biophysical conditions of farming land wereless conducive to influence the decisions of farmers to Apply farming technology. The third, the opportunity to increase farming productivity in tidal lands was still wide open by optimizing the potential utilization of farmland resources based on the strengths and weaknesses of farmers. The fourth, the strategies to increase productivity in tidal land agroecosystem areas were conducted by diversifying into multi- enterprises, implementing integration patterns between commodities, accelerating technology dissemination, and encouraging the growth of partnership networks. In order for these strategies to be implemented, it is necessary to have a soft credit scheme policy which in its implementation it is followed by assistance of extension agents and researchers.
The Potential of Nutmeg’s Microbes (Myristica fragrans Houtt.) as Antagonistic Agents against Rigidoporus microporus Dwi N Susilowati; Sri Rahayuningsih; Indah Sofiana; Nani Radiastuti
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 10 No. 1 (2021): JLSO
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/JLSO.10.1.2021.529

Abstract

This study aimed to obtain yeast and bacteria from Myristica fragrans Houtt., which have the potential to produce chitinase enzymes with antagonistic ability against Rigidoporus microporous. Both microorganisms were extracted from the leaves and fruit of nutmeg. A total of 35 yeast and 29 bacterial isolates were obtained, with different morphological characters. The chitinolytic test was carried out qualitatively, and the parameters observed include the clear zones around the colony. A total of 4 bacterial isolates produced chitinase enzymes (BP 1.2.1, BP 2.1.1, EPBj II.K1, and EPBj II. K2) with a chitinolytic index of 3.92, 5.38, 2.00, and 1.66, respectively. Yeast isolates were negative for chitinase enzymes. The difference in index value indicated a variation in enzyme activity. The antagonist test was carried out using a dual culture method. A total of 1 yeast and 14 bacterial isolates inhibited the growth of R. microporous, and each has a different inhibitory zone. Based on the percentage of inhibition value, the highest percentage occurred in P.K1(41.1%), P. K2 (50%), dan EPBj II. K6 (42.2%). The antagonist test indicator includes the formation of inhibitory zones on the medium. Hemolysis test showed that yeast and bacteria are not able to break down blood cells in the medium. The molecular identification showed that P. K1 and P. K2 isolates were classified as Bacillus subtillis and EPBj II. K6 were identified as Bacillus aerius with 100% sequence homology and 99% bootstrap value respectively. These findings provided information about potential microbes that control white root fungus.       
Development Model of Food Crop in Suboptimal Area Based on Farmers Corporation in Ogan Ilir Regency, South Sumatra Riswani Riswani; Yunita Yunita; Henny Malini; Thirtawati Thirtawati
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 10 No. 2 (2021): JLSO
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jlso.10.2.2021.530

Abstract

This research was conducted based on the condition of fulfilling the food needs of the region, which was currently not being carried out with the distribution pattern and weak institutional Strengtening at the farmer level, so that its utilization was not yet efficient in exploitation especially on suboptimal land. Based on this, the main objective of this study was to formulate a model for the development of food crop agricultural areas on suboptimal land oriented to farmer corporations. This research used qualitative methods but the relevant mathematical formulas were still used. From the result of the analysis, an applicative program for the development of agricultural areas based on farmer corporation in Ogan Ilir Regency was compiled, which was based on a political, technocratic approach, integration of top down policy-bottom up planning and participatory. The recommended program group was divided into programs for optimizing the availability of production inputs, developing rice cultivation and supporting infrastructure, controlling pests and diseases of rice plants, improving and empowering farmer institutions, improving and increasing farmers' knowledge and skills, improving harvest and post-harvest, improving marketing, improvement of supporting infrastructure, and development of capital. The location for the development and implementation of the program was focused on the districts of Muara Kuang, Pemulutan, Lubuk Keliat, Indralaya and Pemulutan Selatan.
Effectivity of Bacillus thuringiensis from Soil in Freshwater Swamps against Epilachna sp. Larvae Yulia Pujiastuti; Erni Indriani; A Muslim; Chandra Irsan; Arsi Arsi
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 10 No. 1 (2021): JLSO
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/JLSO.10.1.2021.531

Abstract

Bacillus thuringiensis is an entomopathogenic bacterium isolated from the soil and  has been widely used as an active ingredient in the manufacture of bioinsecticides. The target insects are very specific and depend on the type of protein content. Epilachna sp. are important insect pests because both larvae and adults as plant-eating pests. The research aimed was to investigate the effectivity  of  B. thuringiensis against the larvae of Epilachna sp.. B. thuringiensis- bio-insecticide was prepared using isolates originally from freshwater swamp soil of South Sumatra (SMR04). Epilachna sp larvae were mass-reared with Solanum torvum leaf feed in the laboratory. The design used was a completely randomized design, with 6 treatments and 5 replications. Treatments were spore concentration contained in the bioinsecticide solution included: 1 x 108, 1 x 107, 1 x 106, 1 x 105 spores/mL, commercial bio-insecticide and without treatment as a control. Each replication used 10 individual of the 2nd larvae. Statistical test results showed larval mortality in B. thuringiensis treatment was significantly different from commercial bio-insecticide treatment. The highest mortality of bio-insecticide treatment occurred at a concentration of 108 spores/ml (40.00 %) and the lowest was at a concentration of 105 spores/mL (18.01 %). The lowest LT50 value of bio-insecticide treatment was at a concentration of 108 spores/mL, namely 79.37 hours. The control of larvae included in the Coleoptera order was still not satisfactory yet, considering the presence of protein content in B. thuringiensis strain SMR04 which did not match the type of protein required.
Yield Improvement of Upland Rice Planted between Oil Palm Using Organic Matter Eliartati Eliartati; R S Anggraini; A Sofia
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 10 No. 1 (2021): JLSO
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/JLSO.10.1.2021.532

Abstract

The application of organic matter is a way to improve upland rice productivity that grows among immature oil palm plants. To improve the yield of upland rice among immature oil palm plants, this study has been carried out by providing organic matter. The research aimed to determine the effect of organic matter application for upland rice production that plant among immature oil palm. The experimental design used in this study was Randomized Block Design with 5 treatments and 4 replications. The treatment includes: control, rice straw compost, weed biomass compost, palm oil empty bunch compost, and cow manure. The dose of organic matter given was 3 tons/ha. The results showed that the application of organic materials have significant effects on yield component and the production of upland rice. In general, the best yield and yield components were obtained in the manure treatment, namely plant height 104.7 cm; the number of productive tillers 158 grains; the percentage of filled grain per panicle was 85.8% and grain yield was 5.6 tons/ha or increase by 21.74% compared to the control treatment (4.6 tons/ha). The highest number of productive tillers and weight of 1000 grains were obtained in the palm oil empty bunch compost treatment (14.5 and 28.2 g).
Seed Quality of Paddy Variety (Oryza sativa L.) Resistant to Vegetative Phase Drought Stress Winggi Anggun Jati; Zaidan Panji Negara; Firdaus Sulaiman
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 10 No. 1 (2021): JLSO
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/JLSO.10.1.2021.538

Abstract

Drought is an abiotic stress that can affect paddy yields by inhibiting growth, thereby reducing the quality of the seeds produced. This study aimed to find out the best seed quality of several paddy varieties produced from the plants experiencing drought stress in the vegetative phase. The varieties used in the study were Inpago 12, Unsoed 1, Inpago 4, Inpago 5, Inpago 9, Inpago 8, Inpago 10, Inpara 8, Inpara 9, Rindang 1, Rindang 2, Situ Patenggang, Towuti, and Batu Tegi. The drought stress was applied to the vegetative phase of the plant by reducing the intensity of water supply (63.5% moisture content), then the resulting seeds were tested in the laboratory. The results of the study showed that the highest seed quality value in the drought stress treatment of the vegetative phase were the Inpara 8 variety, followed by the Towuti variety with 93.33% and 88% germination values, 82.67% and 70% simultaneous growth, 12.11% and 8.44% germination rate, 64% and 64% germination strength, and 18.99 and 16.83 vigor indexes. Meanwhile, the lowest seed quality was the Inpago 8 variety with 26% germination value, 21.33% simultaneous growth, 1.33% germination speed, 3.33% germination strength, and 2.71 vigor index. Among all the varieties tested, the Inpara 8 and Towuti are those with the best seed quality values ​​after experiencing drought stress during the vegetative phase.

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