Jurnal Lahan Suboptimal : Journal of Suboptimal Lands
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Identification of agronomic characters of F1 rice plants derived from crossing Inpara 8 and Inpago 12 varieties
No full textSuboptimal rice productivity in the swamp was due to both drought stress and submergence stress during the lifetime of the rice, and swamp rice could only be planted once a year. One of the efforts to increase the productivity of swamp rice was to develop rice varieties that can tolerate drought stress and submergence stress. The study aimed to validate the success of the F1 cross and to develop rice varieties exhibiting dual tolerance through backcrossing. Data analysis utilized Analysis of Variance followed by 5% test. The planting method uses a Randomized Complete Block Design (RCBD) with three replications. Observed variables included plant height, number of tillers per clump, number of panicles per clump, number of grains per panicle, number of grains per clump, weight of grain per panicle, dry weight of harvested grain, dry weight of grain, weight of 1000 grains, percentage of empty grains, flowering age, and harvesting age. Evaluations of growth characteristics revealed no significant differences in genetic traits and characteristics between the crossed rice and the parental lines. Flowering age and harvesting age of rice Inpago 12 elders were faster than Inpara 8 elders. Plant height of Inpago 12 elders was higher than Inpara 8 elders. This was due to differences in genetic traits and characters between varieties, and finally it was concluded that F1 accessions were successfully crossed and did not single-cross
Diversity and role of insects on vegetation around sugar palm (Arenga pinnata) plants in Tanjung Miring Village, Muara Enim Regency
No full textArenga pinnata (sugar palm) was a crop of high ecological, economic, and social in South Sumatra, particularly in Muara Enim Regency. Despite its importance, limited scientific information regarding the diversity and ecological functions of insect communities associated with this species. This study aimed to identify and classify insect taxa specifically decomposers, phytophagous, pollinators, and natural enemies found in and around sugar palm stands in Tanjung Miring Village. Field observations were conducted using purposive sampling, and insect specimens were collected through four established methods: yellow sticky traps, pitfall traps, sweep nets, and manual hand collection. A total of 850 insect individuals were recorded, with the greatest abundance observed on trees possessing trunk diameters between 31‒40 cm. Hymenoptera was the most frequently encountered order, with Monomorium minimum identified as the most dominant species. Among the collection methods, yellow sticky traps yielded the highest number of individuals. Biodiversity analysis revealed a Shannon-Wiener index (H′) of 2.47, indicating moderate diversity. The evenness index (E) was 0.73, suggesting relatively low species distribution uniformity, while the dominance index (D) was 0.13, implying the absence of a single dominant species within the community. Statistical analysis using NCSS software demonstrated a significant effect of trap type on insect abundance, but no significant differences were found based on insect order, tree diameter, or observation period. These findings underscore the ecological importance of insect diversity in sugar palm ecosystems, as various functional groups such as pollinators, herbivores, and decomposers play vital roles in supporting the growth, productivity, and sustainability
Antibacterial activity of ginger essential oil derived nanobactericide against the growth of phytopathogenic bacteria - A Review
No full textPhytopathogenic bacteria infect various plants, causing economic losses, negative environmental consequences, and harming agricultural development. The most currently available antimicrobial agents for agriculture were potentially toxic, non-biodegradable, and cause significant harm to the ecosystem. As a result, novel, effective, safe, user-friendly, and alternative methods were urgently needed. Essential oils (EOs) have great potential in managing plant bacterial diseases because they successfully destroy various pathogenic bacteria. Ginger essential oil (GEO) is more widely used because it contains a diverse mixture of volatile substances, such as phenolic compounds, terpenes, polysaccharides, lipids, and organic acids. The antibacterial activity of the EO against phytopathogenic bacteria is significantly improved when it is converted into nanoparticles. Nanoparticles (NPs) that were derived from EOs have a considerable antibacterial action resulting from increased chemical solubility and consistency, minimal rapid evaporation, and slow depletion of the effective substances of EO. Ginger EOs were encapsulated in chitosan as a nanogel to improve the antibacterial effects and the consistency of the oils against pathogenic bacteria. Nanogel had been shown to amplify the antibacterial effect of EOs against pathogenic bacteria by enhancing their potential to disturb the integrity and permeability of the cell membranes. This paper focuses on three major parts of ginger essential oils: the antibacterial efficacy to control plant pathogenic bacteria, the possible mechanisms of action of essential oils as nanobactericides, and more importantly, the fabrication of bactericide nanoformulation
Analysis of consumption expenditures and determining factors of rice availability for households of lebak rice farmers in Kertapati District, Palembang
No full textMeeting nutritional needs is crucial for developing quality human resources, while food security depends on production capacity, purchasing power, and supply chain factors, influenced by socio-economic and ecological conditions. The research aimed to analyze the total income of farmer households, analyze the consumption expenditure of farmer households, and analyze the factors that influence the availability of rice for households of lowland rice farmers in Kertapati District, Palembang City. The research method used was a survey method. This research was carried out in July 2024 with a total of 50 samples selected simply at random. The data processing method used to answer the first and second objectives is mathematical calculations to calculate rice farming income, non-rice farming income and non-farming income, as well as calculating food and non-food consumption expenditure. Meanwhile, to answer the third objective, multiple linear regression analysis was used. The results of this research showed that: 1) The average total household income of Lebak rice farmers was 4,457,241 IDR/month. 2) household food consumption expenditure for Lebak rice farmers was 2,674,626 IDR/month, while non-food consumption expenditure was 1,594,396,- IDR/month. 3). The availability of rice for lowland rice farmers' households is 2.65 kg/month, which was included in the low criteria. Factors that influence the availability of rice for Lebak rice farming households were land area, income and age of the farmer. Land area and income has a positive effect, while farmer age has a negative effect
Integration of geographical information systems in the land suitability assessment for rice crops in Sleman District, Indonesia
No full textPeatlands (according to the Governmental Regulation nr 71/2014) can be utilized for agriculture and plantation if the peat depths are less than 3 m or more than 3 m, peatlands have to be conserved or restored. Determining peat depths can be conducted in the fields by intensive surveys which were so expensive, inefficient, and ineffective, therefore it was essential to find our simple alternative methods how to measure peat depths easily. The research aimed to establish a spatially reliable interpolator for peat depth variability by utilizing the kriging method. The research was conducted in Seponjen Village, Kumpeh, Muaro Jambi, Jambi Indonesia. Primary data were processed by applying ArcGIS 10.3 software. The interpolated dataset of peat depths validated their actual dataset and performed an excellent relationship (indicated by a positive correlation coefficient, r = 0.920) and a coefficient of determination (R2 = 0.847). It indicated that the interpolated dataset could be utilized to make maps by kriging. The very deep peat (Site A) and the deep peat (Site B) showed a tendency for a strong autocorrelation of the data distribution of peat depths. Autocorrelation tended to be anisotropic towards the river on the shallow peat (Site C). A good interpolator of peat depth variability can be generated using the kriging method
Liquid organic fertilizer concentration of pineapple peel on the growth and production of black potato, Plectranthus rotundifolius (poir.) Spreng
No full textThe research aimed to determine the effect of applying liquid organic fertilizer from pineapple peel on the growth of black potato, Plectranthus rotudifolius (poir) Spreng. In this research the method used was Randomized Block Design (RBD) method with six treatment levels, each treatment repeated four times across four blocks, resulting in 24 experimental units. In this study, six treatments were applied, consisting of various concentrations of liquid organic fertilizer from pineapple peel P0 = no treatment, P1= 10%, P2= 15%, P3= 20%, P4= 25% and P5= 30. The research used manure and NPK fertilizer as basic fertilizer in soil planting media. The results showed that the application of pineapple peel had a significant effect on the growth parameters of black potatoes, especially on root fresh weight, shoot fresh weight and tuber volume, treatment P4 (25%) produced the highest shoot fresh weight, average 535.75 g, while P2 the lowest average was 332.25 g, the highest fresh root weight was 18.25 g, while the lowest P1 was 10.75 g and tuber volume had a significant effect on treatment P2 (15%) producing the highest volume namely 4.89 g, while the lowest was 4.10 g. The application of 15% pineapple peel liquid organic fertilizer significantly increased crown fresh weight, root fresh weight, and tuber volume of black potato, while having no significant effect on other growth parameters
Diversity insect in the Vegetative Phase of Arenga pinnata (wurmb) merr. in Tanjung Miring Village, Muara Enim
No full textOne of the factors that support the growth of sugar palm plants was the presence of insects that indirectly play an important role in the ecosystem of these plants. The study aimed to determine the abundance, diversity, and role of insects associated with young sugar palm plants (vegetative) in Tanjung Miring Village. The method used was purposive random sampling by setting yellow sticky traps and pitfall traps. Data collection techniques were obtained through direct observation in the field by setting two traps and interviews with sugar palm plant farmers using a questionnaire. The results showed that there were 21 insect species belonging to 18 families from 8 orders. Three important insect groups consisted of 9 types of pollinating insects, 7 types of herbivorous insects, and 5 types of decomposing insects. The abundance of pollinating and decomposing insects was dominated by the orders Hymenoptera and Diptera with a total of 338 individuals. The highest insect species diversity was found in the yellow trap with 13 species and a Shannon-Wiener diversity index (H') of 2.17. While pitfall traps, only 8 species of insects were found with an H' value of 1.43. The high diversity and abundance of yellow traps showed the dominance of active flying insects, especially pollinators, with the highest relative abundance (Di=2.43). The complex ecosystem of the sugar palm groves is an important habitat for various insects with complementary ecosystem functions
Growth response of lettuce plants to the application of NASA liquid organic fertilizer and cow manure
No full textLettuce (Lactuca sativa L.) was a leafy vegetable that has high economic value in Indonesia and provides health benefits to consumers. The use of organic fertilizers is deemed more optimal than inorganic fertilisers due to the potential of inorganic fertilizers to cause soil damage and environmental pollution through chemical residues and land productivity reduction. The study aimed to evaluate the effects of using NASA liquid organic fertilizer and cow manure on the growth and yield of lettuce plants. The study used a Randomised Block Factorial Design with two factors: cow manure with four treatment levels and NASA liquid organic fertiliser with three treatment levels. The results showed that chicken manure had a significant effect on plant height, leaf area, leaf dry weight, and stem fresh weight at 28 days after planting (DAT), while NASA liquid organic fertilizer had no significant effect on all parameters except plant height at 7 DAT. Higher doses of chicken manure (S2 and S3) contributed to the increase in dry weight and fresh weight of leaves. Application of NASA liquid organic fertilizer at a dose of 4 ml/L (N2) showed a better response in supporting plant vigor than others. In addition, the highest plant fresh weight was obtained in the combination of S3 and N2 treatments, indicating a synergistic effect between the two types of organic fertilizers. High a dose of chicken manure (S3 = 900 g) can negatively affect growth by lowering soil pH and causing too acidic conditions that are not optimal for plants
Growth and yield of lettuce (Lactuca sativa L.) grown on different planting media volumes in a floating cultivation system
No full textLettuce (Lactuca sativa L.) is one of the vegetables that is widely loved because of its taste and nutritional content. The increase in lettuce production can be increased by the use of swamp land with floating cultivation during the flood season. The size of the pots used in floating system cultivation will affect the growth and number of plants that will be produced. The study aimed to determine the optimal of planting media volume on the growth and yield of lettuce in floating cultivation system. The research used a randomized block design with 4 treatments of planting media volume, namely 1.9 L (P1), 2.7 L (P2), 3.6 L(P3), and 5 L (P4). Each treatment was repeated 4 times and each replication consisted of 5 plants. The results showed that at the beginning of the growth of the media volume of 2.7 L would be faster, but at the time of harvest almost all parameters showed that plants with a media volume of 5 L produced a larger plant weight than the plant unit. Although the use of smaller volumes of media results in a smaller plant weight, the raft is able to accommodate a larger number of pots. So that the use of a media volume of 1.9 L will be better used for floating lettuce production
Conservation strategy based on soil erodibility with several land covers and slopes in the upstream of Air Bengkulu Watershed
No full textGlobal land cover changes driven by increasing demand for agricultural, residential, and industrial land have caused various environmental issues, including soil erosion. The study aimed to analyze soil erodibility values upstream of the Air Bengkulu watershed based on land cover and slope factors. The analysis was conducted using soil samples obtained through purposive sampling based on soil map units, topography, and land cover. Soil erodibility values were determined through laboratory analysis of organic matter, texture, structure, and soil permeability, followed by calculating erodibility. After obtaining the distribution of erodibility values, the next step involves identifying erodibility values based on slope and land cover to analyze the interaction between slope and land cover on erodibility values. Conservation recommendations are provided based on slope, land cover and consideration of community aspects to reduce erodibility values and minimize erosion risk. Results indicate that soil erodibility in the Air Bengkulu watershed ranges from very low to very high, with most areas classified as low. The findings suggest that soil erodibility values vary depending on land cover and slope. Higher erodibility values were observed in areas with minimal land cover, especially in mining and cultivated land with poor management practices. In contrast, dense vegetation such as forests and well-maintained plantations significantly reduced soil erodibility values. The interaction between slope and land cover plays a crucial role in determining soil susceptibility to erosion risk. Vegetative and mechanical conservation strategies are suggested to mitigate erosion risks, improve land productivity, and support ecosystem sustainability in the region