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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.
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Articles 12 Documents
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Search results for , issue "Vol. 10 No. 2 (2021): JLSO" : 12 Documents clear
Effect of Fermentation Extracts against Bemisia tabaci on Chilli Pepper (Capsicum annuum) Rudi Putra Munandar; Suwandi Suwandi
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 10 No. 2 (2021): JLSO
Publisher : Research Center for Sub-optimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jlso.10.2.2021.493

Abstract

This experiment was aimed to determine the effects of application of fermentation extracts on the development of pepper yellow leaf curl and whitefly on chilli. Experiment arranged in a completely randomized block design with four treatments (water as control, fermentations extracts named TSNGlu, BP4, and BP4Glu). The results showed symptoms in the form of curling of young leaves. The color of the leaves was relatively green. Yellow symptoms commonly found when severe were not found in the experiment. The symptoms of severe disease are marked in yellow at the top of the leaf and remain green at the bottom. The laboratory used 350 lux (underexposed light) so the symptoms become slight. ack of light intensity made plants etiolated and could not carry out photosynthesis properly. Each experiment consisted of 4 fermentation extract treatments. Each treatment. Overall, all treatments without fermentation and also AUDPC of the disease did not significantly affect the treatment of fermented extract both the incidence and severity of the low pepper yellow leaf curl virus. The treatment by spraying did not significantly affect the population of whitefly, except at 7 days after infestation, inversely proportional to the spraying treatment by means of discharge significantly affected from 14 days after infestation. The increase in plant height spray treatment did not have a significant effect and for spraying treatment with extraction of fermentation did not significantly affect the canopy area of ​​the plant canopy.
Relevance of Local Wisdom towards Efforts to Achieve Sustainable Food Sovereignty in Bangsal Village, Pampangan District, Ogan Komering Ilir Regency Eka Mulyana; Yulian Junaidi; Madina Soraya
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 10 No. 2 (2021): JLSO
Publisher : Research Center for Sub-optimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jlso.10.2.2021.512

Abstract

This study aims paused analyzing the relevance of local wisdom toward efforts in achieving sustainable food sovereignty in Bangsal Village, Pampangan District, Ogan Komering Ilir Regency. This exploratory descriptive study was conducted in Bangsal Village, Pampangan District, Ogan Komering Ilir Regency in February 2020. Data collected were both of primary and secondary data. The analyses show that the swamp marshland was managed into three parts, i.e. buffalo husbandry, swamp fish farming and rice farming is provably more appropriate. For the buffalo husbandry, the community apply their local wisdom of kalang (shepherd) system. While for the fish farming, the capture fishery (beje) system was used. Futhermore, for rice cultivation, it consists of several stages with their respective local wisdom used, i.e. a) tillage, using rewang and perarian systems, b) Seeding, using seeds from their last harvest, c) planting, transplanting, spaced planting, or direct planting (tunjam) d) fertilizing, using weeds or wild plants, e) maintaining, with local wisdom, using scarecrow and plastic surrounding field, f) harvest, mutual cooperation in cutting the rice with sickle (ngarit bersama), and g) post-harvest, selling the harvest directly or self-storage. The results show mean of 54.60 from the 7 indicators and it was included in high criteria. It is conluded that there was a significant relevance between local wisdom and efforts to achieve sustainable food sovereignty in Bangsal Village.
Farmer Institutional Dynamics in Vegetable Agribusiness Development Efforts in Kelurahan Talang Keramat, Banyuasin District Yulian Junaidi; Yulius Yulius; Elly Rosana; Ogi Falma Manullang
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 10 No. 2 (2021): JLSO
Publisher : Research Center for Sub-optimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jlso.10.2.2021.516

Abstract

Farmers' institutions, whether fostered by the government or those that have emerged from the initiatives of non-governmental organizations (NGOs), have an important position in developing vegetable agribusiness. This research aimed to compering the institutional dynamics of government-assisted farmers and non-government organizations and to formulate a collective learning institutional framework. The survey method was carried out by taking disproportional stratified random sampling, the data were analyzed using scoring, chi-square crosstabs and SWOT analysis. The results of this study indicate that the institutional dynamics of farmers are on average in moderate criteria with differences in dynamic indicators. Government-assisted groups prioritize achieving agribusiness goals, while NGO-assisted groups develop an egalitarian structure. Factors that significantly influence the institutional dynamics of farmers are farmer age, education, status in the organization, and access to credit. The joint learning framework from the technological aspect is aimed at discovering, sharing and using vegetable agribusiness development technology. Meanwhile, from the institutional aspect, it is aimed at strengthening organizations and networks.
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 Sub-optimal 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 Sub-optimal 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.
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 Sub-optimal 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.
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 Sub-optimal 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.
The Main Disease and its Attacks in the Generative Phase of Maize (Zea Mays L) in the Freshwater Swamps of South Sumatra Harman Hamidson; Riski Anwar Efendi
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 10 No. 2 (2021): JLSO
Publisher : Research Center for Sub-optimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jlso.10.2.2021.540

Abstract

In South Sumatra, the ​​freshwater swamps is 157,846 hectares, with this wide freshwater swamps, it can be used for crops food  cultivation, one of which is maize. The purpose of this study was to provide information on the identification and attack of maize disease in freshwater swamps of South Sumatra. The research method was purposive sampling. The results of the study identification that the symptoms of maize leaf rust attack, seen from the physiology of maize leaves, were the lumps or pustules of orange color such as rust and the symptoms of maize leaf blight seen from the physiology of maize leaves, were small oval brownish lines like burning leaves. The leaf rust disease had an attack rate of 90% and the maize leaf blight reached 98%. Based on the results of this study, the main disease of maize attacking in the generative phase was the leaf rust (Puccinia polysora) and maize leaf blight (Bipolaris maydis).
Response of Three Sweet Maize Varieties to Leaf Blight (Exserohilum turcicum) Planted in Freshwater Swamps of South Sumatra Rafika Oktarida; Harman Hamidson
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 10 No. 2 (2021): JLSO
Publisher : Research Center for Sub-optimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jlso.10.2.2021.541

Abstract

Planting resistant varieties is the most effective control method and is recommended because it is safe for the environment. The problem to be raised in this study was the use of the same variety of maize in every growing season by farmers. The use of one of these varieties could cause a decrease in yield due to the resistance of the variety to certain pests and diseases.  This study aimed to provide information in the form of the use of sweet maize varieties resistant to leaf blight and potential to be planted in the swampy lowland of South Sumatra. The varieties used in this study were Bonanza F1, MB-01 Sweet and Love Sweet varieties. Based on the results of the study, as a whole the use of several varieties had a significant effect on the severity of leaf blight. The results of this study showed that there were differences in the response to resistance of each variety to leaf blight caused by the fungus Exserohilum turcicum. The observation of disease severity was carried out only in the vegetative phase. The highest disease severity was found in the Bonanza, Love Sweet, and MB-01 Sweet varieties at 16.90%, 9.99% and 7.07% respectively. The production data showed that there was no significant effect on the leaf blight. The MB-01 Sweet variety had the potential to be planted on swampy soil because it had resistance to blight and had a high production rate.
Shortening Dormancy Period of Oil Palm Seeds (Elaeis guineensis) using Sulfuric Acid (H2SO4) and Gibberellic Acid (GA3) Solutions Yudo Winarso; Bambang Subardjo; Selardi Sastrosayono
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 10 No. 2 (2021): JLSO
Publisher : Research Center for Sub-optimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jlso.10.2.2021.543

Abstract

Soaking oil palm seeds in a solution of sulfuric acid and gibberellic acid is one way to shorten the dormancy period of oil palm seeds. This study aimed to find out the optimum soaking time of oil palm seeds in sulfuric acid solution to accelerate germination, the optimum concentration of gibberellic acid for oil palm seed germination, the interaction between using sulfuric acid and gibberellic acid in accelerating the germination of oil palm seeds and the best treatment combination in all the tried treatments. The experimental design used was a completely randomized design (CRD), with a complete factorial combination with a total of 16 treatments. Each treatment was repeated 4 times, so there were 64 experimental units and each unit was planted with 5 seeds. The results of statistical analysis showed that soaking oil palm seeds in a solution of sulfuric acid and gibberellic acid had an effect on the germination of these seeds. The duration of soaking oil palm seeds for 48 hours in sulfuric acid solution constituted the optimum time for increasing the speed of germination and giving gibberellic acid at a concentration of 300 ppm still accelerated the germination of oil palm seeds and there was no interaction between the length of soaking the seeds in sulfuric acid solution and the concentration of gibberellic acid.  Soaking the seeds in a solution of sulfuric acid for 48 hours and gibberellate 300 ppm was the best combination treatment to accelerate the germination of oil palm seeds.

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