JURNAL AGRONOMI TANAMAN TROPIKA (JUATIKA)

Drought Resistance Of Several Local Upland Rice Genotypes (Oryza sativa L.) From West Sumatra Province

2025-09-13T16:51:24+07:00

Rice is a major staple food for the Indonesian population, therefore, its productivity must be improved to accomplish the domestic consumption. Efforts to increase rice production in a sustainable manner in the future not only rely exclusively on lowland rice production but also from other genotypes including upland rice. West Sumatra is one of the province in Indonesia that preserves various local upland rice germplasm. The characterization of local upland rice genotypes to drought stress are required in order to support the increase of national rice production. This study aims was to obtain the West Sumatra local upland rice genotypes that are resistant to drought. The drought resistance screening was carried out in three ways, namely: 1) Testing of seed resistance with Polyethylene Glycol (PEG), 2) Testing of root penetration using a wax coating, and 3) Testing of proline content. From the study, two genotypes, namely: Susun Porti and Ladungan which have good resistance to drought.

Effectiveness of Seed Priming on Vigor and Viability of Moringa Seeds (Moringa oleifera L.)

2025-09-13T16:50:51+07:00

Moringa is often referred to as the "miracle tree" due to its rich nutrient content and medicinal properties. The increasing demand for moringa seeds has highlighted the need for effective propagation methods; however, germination remains limited by the hard seed coats and prolonged dormancy periods. This gap underscores the importance of studying moringa, particularly in efforts to enhance germination success and initial growth. This study aims to evaluate the effects of various seed priming materials, soaking durations, and the interactions between different types of seed priming materials and soaking times on the vigor and viability of moringa seeds. The research was conducted in the Biotechnology Laboratory and greenhouse at the Faculty of Agriculture, National Development University "Veteran" East Java. This study employed a Completely Randomized Design (CRD) with a factorial arrangement of two factors, comprising fifteen combinations and three replications. The first factor is the type of seed priming material (S), which includes Aqua Destillata, seaweed extract, coconut water, PEG 6000, and KNO3. The second factor is the soaking time for the priming solution (L), which consists of 12 hours, 24 hours, and 36 hours. Observations include germinability, maximum growth potential, growth rate, vigor index, and sprout weight. The combination treatment of PEG 6000 as the seed priming material with a soaking time of 12 hours yielded the highest average values for germination and maximum growth potential. A single treatment using PEG 6000 resulted in the highest average vigor index. Additionally, a single treatment with a soaking duration of 12 hours also produced the highest average vigor index. The results of this study can be recommended as optimal treatments to enhance the germination capacity and vigor of Moringa seeds.

Improving Oil Palm (Elaeis guineensis Jacq) Farmer Productivity in Labusona Village, Labuhan Batu Regency

2025-09-13T16:49:08+07:00

Oil palm (Elaeis guineensis Jacq.) is a plantation crop that plays a vital role in the Indonesian economy. This study aims to analyze production costs, income, and the effect of production costs on oil palm farming income in Lobusona Village, Labuhanbatu Regency. The research sample consisted of 30 farmers selected through simple random sampling. Data were analyzed using multiple linear regression. The results show that the average production cost incurred by farmers was IDR 60,600,167 per year, while the average revenue reached IDR 136,266,783 per year. This yield resulted in a net income of IDR 75,666,617 per year, or approximately IDR 24,532,139 per hectare per year. The F-test results indicate that production costs, when considered simultaneously, have a significant effect on income (Sig. 0.000 < 0.05). Meanwhile, the t-test results reveal that fertilizer costs had no significant effect, whereas pesticide and labor costs had a significant adverse effect on income. Conversely, annual production, plant age, and the price of fresh fruit bunches (FFB) had a significant positive effect. The coefficient of determination (R²) of 0.996 demonstrates that 99.6% of the variation in income is explained by the variables included in the model. These findings suggest that the efficient allocation of production costs—particularly for pesticides and labor—is crucial for improving the profitability of oil palm farming.

Utilization of Subsurface Drainage to Reduce Salinity under Different Saline Soil Mixture Ratios and Their Effects on the Growth of Red Spinach (Amaranthus tricolor)

2025-09-13T16:50:16+07:00

Soil salinity is a significant limiting factor in plant growth, particularly in areas affected by salt accumulation. This study aims to analyze the effectiveness of underground drainage in reducing soil salinity through the leaching method and its impact on the growth of spinach (Amaranthus tricolor). The experiment involved applying saline soil mixtures at ratios of 25%, 50%, 75%, and 100% alongside non-saline soil while utilizing underground drainage to expedite the salt leaching process. The parameters observed included pH, electrical conductivity (EC), sodium (Na) content, and plant growth. Observations were conducted at 1, 10, 20, and 30 days, with three replications for each treatment. The results indicated that underground drainage significantly reduced soil salinity levels in a relatively short period. The decrease in salt concentration positively influenced spinach growth, particularly in treatments with lower saline soil mixture ratios. These findings suggest that underground drainage can serve as an effective solution to mitigate agricultural land salinity, thereby enhancing plant productivity.

Analysis of Peat Soil Characteristics (Histosol) at Several Maturity Levels in Oil Palm (Elaeis guineensis Jacq.) Plantations in Lubuk Sakat Village, Kampar

2025-09-13T16:49:46+07:00

Agricultural development on peatlands requires a careful and thoughtful approach. Therefore, conducting an inventory of their characteristics is essential for ensuring proper utilization and effective planning. This study aims to analyze the characteristics of peat soils in Lubuk Sakat Village, Kampar, Riau, which are planted with oil palm at various maturity stages, covering a potential peatland area of approximately 800 hectares. The research was conducted using observational and descriptive methods, with purposive sampling employed at peatlands of fibric, hemic, and sapric maturity stages. The observed soil characteristics included pH, organic carbon (C-Organic), available phosphorus (P-Available), and cation exchange capacity (CEC). In addition to these chemical properties, the soil microbial population was also assessed. The results revealed that soil pH, C-Organic, and CEC were similar across the three maturity stages, while P-Available was higher in sapric and hemic peat compared to fibric peat. The microbial population was found to be highest in sapric peat, followed by hemic peat, and lowest in fibric peat. These findings are expected to provide a solid foundation for managing fertilization and improving oil palm productivity on peatlands with similar characteristics.

Analysis of C-Organic, Nitrogen, and C/N Ratio Contents in Oil Palm Plantations Soil Owned by the People of Pulau Binjai Village, Kuantan Mudik District, Kuantan Singingi Regency, Riau Province

2025-09-13T21:56:22+07:00

Land conversion from rubber plantations to oil palm plantations is increasingly common in Indonesia, including in Pulau Binjai Village, Kuantan Mudik District, Kuantan Singingi Regency, Riau Province. Land preparation for oil palm plantations can affect soil fertility, particularly nutrient content. This study aims to evaluate the nutrient content in one-year-old oil palm plantations. The methods used in this study included surveys and laboratory analyses. Soil sampling was conducted at 10 locations using purposive random sampling at a depth of 20 cm, with 5 locations sampled using the grid method and 5 using the disc method. Each sample location consisted of 5 subsamples, which were then composited. The results showed that the soil pH in the grid ranged from 5.96 to 6.48 (acidic category), while in the disc it ranged from 6.2 to 6.88 (acidic to neutral category). The organic carbon content in the grid ranged from 2.61 to 3.74 (medium to high category), and in the plate from 2.82 to 4.28 (medium to high category). The total nitrogen content in the grid ranged from 0.20 to 0.25 (low to medium category), while in the plate it ranged from 0.21 to 0.29 (medium category). The C/N ratio in the grid ranged from 11.16 to 17.00 (medium to high category), and in the plate from 10.44 to 14.75 (low to medium category). The key findings of this research include the identification of organic carbon and nitrogen content in the soil, which enables recommendations for the application of organic and nitrogen fertilizers in the study area.

Application of Dolomite on The Growth And Yield of Various Rice Genotypes (Oryza sativa L.) Grown on Peat Soil

2025-09-14T05:48:54+07:00

Rice is the primary staple food for the Indonesian population. However, land use changes have increasingly limited the availability of potential land for rice cultivation. Indonesia possesses vast areas of peatland, which offer significant opportunities for rice extensification. Nonetheless, the acidic and nutrient-poor nature of peat soils necessitates soil improvement efforts through the application of soil ameliorants. Dolomite is one such ameliorant that can enhance the chemical properties of soil and improve nutrient uptake by plants. This study aimed to evaluate the interaction between rice genotypes and dolomite application rates on the growth and yield of several rice genotypes cultivated on peatland. The experiment was conducted from June to December 2024 in Sunur Village, Nan Sabaris District, Padang Pariaman Regency, Indonesia, using a Split Plot Design in a randomized complete block layout with three replications. The results showed that the genotype and dolomite application significantly affected several agronomic parameters, particularly the 1000-grain weight. Genotypes Bujang Marantau and Caredek exhibited superior performance in most yield components. Dolomite application at 10 tons/ha proved to be the most effective dose, enhancing plant growth and productivity under peat soil conditions. These findings offer practical recommendations for optimizing rice production on marginal peatlands and promoting sustainable agricultural development in Indonesia.

Increasing Growth and Yield of Soybeans (Glycine max L.) by Providing Banana Stem LOF and SP-36 Fertilizer

2025-09-14T06:26:05+07:00

Soybean productivity in Indonesia remains relatively low, partly due to declining soil fertility. One approach to address this issue is the application of liquid organic fertilizer (LOF) and phosphate fertilizers, such as SP-36. This study aimed to evaluate the effects of various concentrations of banana corm-based LOF and different doses of SP-36 fertilizer, as well as their interaction, on the growth and yield of soybean plants (Glycine max L.). The research was conducted in Medokan, Surabaya, using a two-factorial Randomized Block Design (RBD) with four levels of LOF concentration (0, 500, 600, and 700 ml/l) and three levels of SP-36 concentration (150, 200, and 250 kg/ha). The observed parameters included plant height, number of pods, percentage of empty pods, seed weight per plant, seed weight per hectare, and fruit set. The results indicated a significant interaction between LOF and SP-36 on plant height 42 days after planting, number of pods, percentage of empty pods, and fruit set. The most effective treatment was the combination of 600 ml/l banana corm LOF and 200 kg/ha SP-36. However, seed weight per plant and hectare did not show a significant effect. This study concludes that the appropriate combination of banana corm LOF and SP-36 fertilizer can significantly enhance soybean growth and yield. It is recommended to use 600 ml/L of banana corm LOF combined with 200 kg/ha of SP-36 fertilizer to optimize plant height, number of pods, and fruit set in soybean cultivation.

Biodiversity and Carbon Storage Potential in the Lambosir Hill Area, Mount Ciremai National Park, Kuningan Regency, West Java Province

2025-09-15T06:57:31+07:00

The potential for biodiversity, including a variety of tree, shrub, and bush species, is particularly pronounced in ecosystems characterized by high biodiversity, which influences the soil's capacity to retain water—the greater the species diversity within an ecosystem, its ability to sequester CO2 increases. Lambosir Hill is one of the hills located within the protected forest area of Mount Ciremai National Park (TNGC). This study aimed to assess the level of plant vegetation diversity on Lambosir Hill and examine the relationship between biodiversity and carbon stocks. This study was conducted in Lambosir Hill, Mount Ciremai National Park in Kuningan Province, West Java. This study began in November 2022 and ended in March 2023. Activities related to data processing were carried out at the Land Resources Laboratory, Faculty of Agriculture, National Development University “Veteran” East Java. The study results showed low diversity at the shrub level and moderate at the tree level. The highest carbon stock was found in Sonokeling and the weakest in Hamerang. The land use type, slope, and vegetation composition influence these values’ differences. These results show the importance of permanent vegetation in supporting carbon stocks and ecosystem stability. It is recommended that woody tree vegetation such as Sonokeling be preserved to maintain the sustainability of carbon reserves in this conservation area.