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INDONESIA
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 323 Documents
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Study on Water Quality of Some Tributaries in Palembang City Heni Kurniawati
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 12 No. 2 (2023): 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.12.2.2023.638

Abstract

The results of monitoring the water quality of Sekanak, Bendung, and Ogan river  at some point have exceeded the quality standards referring Class II Water Quality Standards in accordance with Government Regulation of Indonesian Republic Number 22 of 2021. To find out the level of water pollution and water quality in the river,  it is necessary to  calculate  the water status and water quality indeks. The purpose of study was to evaluate the water quality status and water quality index of the Sekanak, Bendung and Ogan Rivers. Calculation of water quality status used the Nemerow and Sumitomo Pollution Index method with parameters pH, DO, BOD, COD, TSS, Nitrate, Phosphate, and Fecal Coli and calculation of water quality index in accordance with the Regulation of the Ministry of Environment and Forestry of the Indonesian Republic Number 27 of 2021. The highest concentration of BOD and COD were in Sekanak river at low tide with a value of 9.51 mg/l and 41.36 mg/l. The pollution index was in the range of 0.75 to 2.47 with a meeting quality standars status up to mildly pollutants. Water quality indexs at Sekanak, Bendung and Ogan river in 2020 - 2022 were in the moderate category, except at Ogan river in 2021 was in a good category. From statistical analysis there were  correlation between BOD and COD at the Sekanak, Bendung and Ogan River and the most significant parameters on the pollution index for Sekanak and Bendung River were Phosphate and for Ogan River was BOD.  
Percentage of Flower and Fruit Fall, and Red Chili Production in Ultisol Applied Biostimulants and Inorganic Fertilizers Shabilla Amartiya Sari; Nuni Gofar
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 12 No. 2 (2023): 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.12.2.2023.639

Abstract

Ultisol has main problem of low nutrient availability causing a high percentage of flowers and fruit fall and reducing red chili production. This study aimed to find out effectiveness of biostimulants in reducing percentage of flower and fruit fall, use of inorganic fertilizer doses, and their role in increasing production red pepper in Ultisol. The method used experimental and randomized block design with 9 treatments.  The treatment used application of flush biostimulants and without watering into soil with various doses inorganic fertilizers. The fertilizer doses were 100%, 75%, and 50% based on fertilization recommendations. The study results showed that application of biostimulants combined with inorganic fertilizers of various doses had a significant effect on fruit weight/plant and red pepper production, but had an insignificant effect on the percentage of flowers and  fruits, as well as number of fruits/plant. Application of biostimulants and various doses of inorganic fertilizers tended to increase fall of flowers, number of  fruits/plant, and the percentage of fruit fall. Biostimulants combined  with  inorganic fertilizers were able to reduce fertilizer use as much as 50%.  Production of red pepper with application of biostimulants and 50% of inorganic fertilizers reached 5.36 tons/ha. The results of the economic feasibility analysis of red chili peppers were 1.69 R/C and 0.69 B/C ratio, meaning that the cultivation of red chili with application of  biostimulants was profitable and worthy of development.  So, application of  biostimulants is able to reduce fertilizers by 50% and increase production of red peppers.
Biology of Pentalonia nigronervosa and Its Efficiency as a Vector of Banana Bunchy Top Virus After Being Bred in Rat Taro (Typhonium flagelliforme) Yunanda Audri Balqis; Bambang Gunawan; Suparman SHK
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 12 No. 2 (2023): 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.12.2.2023.642

Abstract

P. nigronervosa is an insect that acts as a vector of the Banana Bunchy Top Virus causing the affected banana  to become stunted and even fruitless. This study aimed to find out the biology of P. nigronervosa in rat taro as well as its  ability or efficiency in the transmission of BBTV disease in bananas after being treated. The study was experimenta, trying to find out the efficiency of BBTV transmission by P. nigronervosa after being transmitted to the plant of rat taro (T. flagelliforme) with  the variables of observation and  the taking of biological  data  of Pentalonia nigronervosa  in the rat taro plant, Observation of the development of BBTV disease in banana plants inoculated from the first symptoms until the typical phenomenon of bunchy top was formed. Biology of P.  nigronervosa in  rat taro. Each stage of the four color instars and The size of the nymph of P. nigronervosa changed. When entering the first brownish-white instar with a length of 0.61 to 0.69 mm, in the 2nd instar it was light brown with a length of 0.71 to 0.83 mm, then in the 3rd instar it was reddish brown with an average length of 0.87 mm, and in the 4th instar  it was blackish brown with an average body length of 1.31 mm. The imago color was still blackish brown, and in this phase it usually had wings, but in the treatment of the imago rat taro plant, it had no wings, and the average body length was 1.43 mm. In the field tests, the rat taro plants could not inhibit the spread of BBTV disease but could be an alternative host for P. nigronervosa ticks.
Diversity of Plant Visiting Insects of Intercrop Lantana camara in Oil Palm Plantation Rizki Putri Amelia; Chandra Irsan
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 12 No. 2 (2023): 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.12.2.2023.643

Abstract

Refugia plant flowers can be a support for biological pest control applications. Insects are visitors to flowering plants, especially the Lantana camara plant, which is interesting to study. This study aimed to determine the diversity of insects that visit flower plants planted among oil palm plants. This study used the Scan Sampling method or direct observation. Insects found in L. camara plants were collected and identified. The results showed that there were 11 species belonging to 11 families and 7 orders. The index value of the diversity of attack species from L. camara flower plants was low. Which means L. camara flowers are not attractive to insects. The species evenness index and dominance index ranged from 0.31-0.60 which means moderate dominance. The dominant insect found in L. camara flowers is Bothrogonia addita. In L. camara flower plants planted among oil palm plants, 11 species of arthropods belonging to 11 families and 7 orders were found. The 11 species are O. salticus, A. coquebertii, B. tabaci, B. addita, Componotus sp., H. itama, A. violae, C. gemmatus, I. elegans, A. crenulate, L. marginicollis. Insects that came to L. camara flowers in the morning were more than those that came in the afternoon with a successive number of 11 species, 268 individuals and 9 species, 141 individuals. The dominant insect found in L. camara flowers is B. addita.
Revegetation of Tropical Peat Swamp Forest of Former Fires Using Local Tree Species in South Sumatra (Indonesia) Bastoni Bastoni; Raissa Anjani; Andika Imanullah
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 12 No. 2 (2023): 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.12.2.2023.645

Abstract

Revegetation of tropical peat swamp forests (PSF) from former fires with local tree species has strategic value for the recovery of PSF, which has been largely lost and severely degraded by logging, conversion, drainage, and repetitive fires. The PSF recovery will be followed by increased forest cover, CO2 sequestration, O2 production, and peat ecosystem biodiversity. The method of revegetation that guarantees successful planting is still very lacking and has not been widely publicized. The study aimed to analyze the growth of revegetated plants on PSF of former fires. It used a field experiment design with four types of local peat plants, namely ramin (Gonystylus bancanus), punak (Tetramerista glabra), tembesu (Fragraea fragrans), and pulai (Alstonia pneumatophora). The results of the study showed that until the age of 2 years, the survival rate of revegetated plants ranged from 92.56%–94.69%, with growth of 32.53–44.94 cm/year and diameter growth of 0.87–1.21 cm/year. The growth of revegetated plants still accelerated in observations until the age of 3 years. This study provides optimism that PSF revegetation degraded by the fires could be carried out with satisfactory results.
The Application of Compost Extract and Biopesticide in Three Different Varieties of Soybean (Glycine max L.) Erise Anggraini; Nuni Gofar; Teguh Randi Pradana; Wahyu Tri Patria; Diana Sinurat
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 12 No. 2 (2023): 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.12.2.2023.651

Abstract

Soybeans are high in protein and vegetable oil. However, soil fertility, among other factors, has resulted in low production. This study aimed to compare the effects of shrimp shells compost extract (EKKU) and Mushroom Substrate Media Compost Extract (EKMTJ) fertilizers in combination with bio-insecticides with active ingredients from Beauveria bassiana on the growth and production of soybean. This was a factorial randomised design study with two factors.  The first factor was compost extract, with P1: EKKU and P2: EKMTJ. Furthermore, the second factor is a dosage of bioinsecticides with B. bassiana active ingredients of 1 litre/ha (B1) and 2 litres/ha (B2). The results showed that the application of shrimp shell compost extract (EKKU) combined with 2 litres/ha bioinsecticide gave the best results in plant height and shoot weight. On the other hand, the application of mushroom substrate medium compost extract (EKMTJ) gave the best results for wet and dry weight of plant pods and canopy dry weight.
Utilization of Jengkol (Pithecellobium jiringa) Peel Biochar and Chicken Manure as Organic Fertilizer on Red Chili Plants (Capsicum annum L) in Acidic Dry Land Rosmiah Rosmiah; R. Iin Siti Aminah; Dessy Tri Astuti; Neni Marlina; Dewi Meidalima; Beta Pratama
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 12 No. 2 (2023): 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.12.2.2023.652

Abstract

Chili (Capsinum annum) is a horticultural plant that is useful as a spice in the kitchen, besides containing vitamins that are good for health. This study aimed as an effort to make jengkol skin agricultural waste useful by adding chicken manure organic fertilizer at different doses with the potential to increase growth and yield of chili plants on acidic dry land. The field experiment was conducted on the land of the Food Crops Agriculture Office, Gandus District, Palembang from March to May 2022. Randomized factorial group experimental design with 2 factors, namely the first factor: the dose of Jengkol Peel Biochar fertilizer (B) consisting of: B1 = 5 tons/ha, B2 =15 tons/ha, B3=25 tons/ha. The second factor: the dose of chicken manure (K) consists of: K0 = 0 (without fertilizer chicken manure), K1 = 10 tons/ha, K2 = 20 tons/ha, K3 = 30 tons/ha. Growth and yield were observed by measuring plant height (cm), stem diameter (cm), number of productive branches (branches), chili weight per plant (g), chili weight per plot (g). The best trial was obtained in the combination treatment dose of 15 tons/ha of jengkol peel biochar fertilizer and 30 tons/ha of chicken manure, which was the best treatment for the growth and production of chilies, with a yield per plot of 343.5 g/plant or equivalent to 10.99 tons/ha.
The impact of government purchase price policy of rice for producers and consumers in Indonesia Saleh, Tri Wahyudi; Lakitan, Benyamin; Budianta, Dedik; Yamin, Muhammad; Cahya, Gemala; Huanza, Muhammad
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 13 No. 1 (2024): 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.13.1.1024.654

Abstract

One of the rice policies was the government purchase price policy which was the price in grain or rice purchases by the Government at producer level to be stable become government rice reserves. The point of this research was to define the impact of the government purchase price policy of rice for producers and consumers. This research was conducted using qualitative analysis with descriptives based on tabulations of secondary data. Results of the research showed that government purchase price was part of the government's efforts to protect the basic price of grain and rice at the farm level thus creating affordable input prices and providing economic added value to farmers. The study found that an improvement in government purchase price  by 18-20% could increase the price of grain and rice from March to August 2023. The total percentage change in prices from March to August 2023 for dry harvested grain was 10.3%, dry milled grain was 10.8%, premium rice was 0.6%, medium rice was 3.2% respectively. Meanwhile, the impact on consumers of this policy was the occurrence of inflation of 0.41% which caused rice prices to increase. The government should evaluate the Government Purchasing Price (GPP) gradually every year.
Optimizing the growth of pangas catfish seeds through the addition of spirulina in feed Harmilia, Elva Dwi; Khotimah, Khusnul; Nofianti, Rini
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 13 No. 1 (2024): 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.13.1.1024.655

Abstract

Pangasius catfish (Pangasius sp.) was an important commodity in Indonesia. High demand in the market requires production to be carried out actively. Adding spirulina as a supplement to feed was a way to increase the growth of pangasius catfish seeds for optimal production. The aimed of the research was to determine the effect of spirulina on the growth of pangasius catfish seeds which were added to pelleted feed. The research used a completely randomized design with four levels of treatment. Treatment 1 (100g commercial pellets + 3g spirulina), treatment 2 (100g commercial pellets + 5g spirulina), treatment 3 (100g commercial pellets + 7 g spirulina), treatment 4 (100g commercial pellets + 9g spirulina). The parameters observed were growth of length, weight, survival, and water quality (pH, temperature and dissolved oxygen). The study results showed that the addition of 7 g spirulina had the best effect on growth with a length of 5.25 cm and a weight of 6.74 g. Meanwhile, the lowest occurred when adding 9 g of spirulina with a length of 4.08 cm and a weight of 5.78 g. There was no mortality during maintenance so that the survival rate of pangasius catfish seeds was 100% in each treatment. So the addition of spirulina to feed has an effect on the growth of pangasius catfish. However, if ftoo much spirulina was added, the effect will not be optimal.
Application of ameliorant on the growth and product of pakchong (Pennisetum purpureum cv Thailand) in post-tin mining land Lestari, Tri; Syazili, Ahmad; Pratama, Deni
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 13 No. 1 (2024): 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.13.1.1024.658

Abstract

Tin mining activities on Bangka Island cause the land to become nutrient-poor. Post-tin mining land use was done by adding ameliorant and cultivating pakchong grass. This research aimed to see the growth and yield of pakchong grass in post-tin mining land by applying mycorrhiza, biosaka and NPK fertilizer. This research was carried out on post-tin mining land in Dwi Makmur Village, Merawang District, Bangka Regency from March 2023 to July 2023. This research used a Randomized Group Factorial Design (RAKF) consisting of 2 treatment factors. The first factor was giving Mycorrhiza (B1) and Without Mycorrhiza (B2). The second factor was NPK 100% (P1), NPK 75% + Biosaka (P2) and NPK 50% + Biosaka (P3). The analysis of variance showed that mycorrhizal treatment had a significant effect on the number of leaves and tillers and had no significant effect on other treatments. Giving NPK + Biosaka treatment had a very significant effect on the number of leaves and had no significant effect on other treatments. The mycorrhiza  to pakchong plants grows better than without giving mycorrhiza. Giving a fertilizer to the 75% NPK + Biosaka (P2) treatment had no significant effect on the 100% NPK (P1) treatment. Giving mycorrhiza + NPK 75% (B1P2) results in higher plant height and leaf number compared to other treatments.

Page 29 of 33 | Total Record : 323

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