University Of Lampung Journal Publication
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The soil available P, Plant P uptake, Growth, and yield of corn in Regosol Soil Treated with Ela Sago Compost and SP-36 Fertilizer
No full textThe research examined the effect of ela sago compost on the soil chemical properties, growth, P-uptake, and yields of corn plants (Zea mays L) in Regosol soils. A randomized block design with a 2 x 4 factorial treatment was applied. The first factor was ela sago compost (B) with three dose levels: B0 = 0-Mg ha-1, B1 = 10-Mg ha-1, and B2 = 20-Mg ha-1. The second factor was SP-36 (P) fertilizer with four dose levels: P0 = 0 kg P ha-1, P1 = 60 kg P ha-1, P2 = 120 kg P ha-1, and P3 = 180 kg P ha-1. This research shows that either ela sago compost or SP-36 fertilizer can increase the soil reaction (pH). Applying sago palm compost and SP-36 fertilizer increases soil available P from 17.33 to 60.67 ppm. Applying sago palm compost and SP-36 fertilizer increases plant P-uptake from 0.18 to 0.40 %, plant height from 135.60 to 189.67 cm, and stem diameter from 1.86 to 3.44 cm, and corn yield (dry weight of 1000 seeds) from 266.60 to 390.57 g
Effect of Premium Compost on Soil Carbon Microbial Biomass in Pineapple Plants on Marginal Land Central Lampung
Full text linkAcidic soil reactions, low nutrient content, low organic carbon levels, and low soil biodiversity characterize marginal land. Adding organic matter, such as compost, is expected to rehabilitate these lands. One key biological indicator of successful land rehabilitation by adding organic matter or compost is soil carbon microbial biomass (SCMB). This study aimed to assess the effect of compost on SCMB in pineapple plants. It was designed using a Randomized Completely Block Design with four treatments: Control (P0) = Without compost (Pineapple Cultivation Standard at GGPC), P1 = Cow dung compost (50 Mg ha-1), P2 = Premium compost A (50 Mg ha-1) and P3 = Premium compost B (50 Mg ha-1). Each treatment was replicated four times. The data were analyzed using ANOVA at the 5% significance level, following testing for homogeneity of variance using the Bartlett test and additivity with the Tukey test. Different treatment means were examined using contrast orthogonal tests, and correlation tests were performed to explore relationships among key variables. Results indicated that cow dung and premium compost (A and B) increased SCMB by 89.31% and 84.06%, respectively, at 15 and 16 MAP observations. At 16 MAP observations, soil organic carbon and soil pH were correlated with SCMB; in contrast, at observations 13, 14, and 15 MAP, soil organic carbon, soil pH, soil moisture, and soil temperature did not correlate with SCMB
Assessment of Andisol characteristics for the development of potato crops in Pangalengan
Full text linkPangalengan is a horticultural crop center area in Bandung Regency. The soil in this area consist of Andisol, which is developed from volcanic ash. One of the primary commodities in this area is potatoes. Intensive farming in Pangalengan is a problem that has an impact on soil and environmental conditions, thereby disrupting crop productivity. The research aimed to assess the characteristics of Andisols for the development of potato crop in Pangalengan. This research used qualitative, descriptive, and survey methods. The survey based on physiographic methods. Soil samples were taken purposively. The observations consisted of soil characteristics, erosion, soil fertility and land suitability. The research results show that the soil type is Typic Hapludans. Erosion is moderate (19.06-94.41 tons/ha/year) in SMU 1 and 2, high (311.22 tons/ha/year) in SMU 3 and very high (798.04 tons/ha/year) in SMU 4, soil fertility is low with land suitability for potato crop including marginally suitable (S3) and not suitable (N). Fertilization, especially P fertilizer and organic fertilizer as well as making bunds in the direction of the contour, are recommended for the development of potato crops in Pangalengan
The Isothermal Phosphate Adsorption in a New Tidal Rice Field of Barito Kuala Regency South Kalimantan: A Study on Phosphorus Adsorption in Acid Sulfate Soils for Agricultural Improvement
Full text linkHigh P adsorption reduces rice production, especially in newly reclaimed paddy fields. The research studied soil P adsorption using the adsorption isoterm equation and soil P solubility in a New Tidal Rice Field of Barito Kuala Regency. This incubation study used soil samples from Ray 7, Balandean Village, Alalak District, Barito Kuala Regency, South Kalimantan Province, from May to November 2022. The isothermal adsorption of P was measured in six soil samples with three replicates. P (0, 2, 5, 10, 15, 30, and 50 mg P kg-1) from KH2PO4 were added in 1 g soil in 25 mL 0.01 M CaCl2. The suspensions were shaken at 25 ! for 17 hours, then centrifuged at 3000 rpm for five minutes, and the supernatant was filtered (Whatman 42) for P analysis. Three ordinary adsorption isotherm equations, Langmuir, Freundlich, and Brunauer-Emmett-Teller (BET), were used to fit the data. After adding 50 mg P kg-1, the average dissolved-P was 34.60 mg kg-1 (69%), and adsorbed-P was 15.40 mg kg-1 (31%). The BET equation was more suitable for describing P adsorption isotherm in this type of soil, which has the ability to adsorb one-third of any P addition
Optimizing Nitrogen Fertilizer for Wheat Production in Moisture-Deficit Areas of Northern Ethiopia
Full text linkDepleting soil nutrients is among the significant factors affecting production and productivity in Ethiopia. From the nutrients, nitrogen is the most yield-limiting, which governs wheat production. Therefore, the study was conducted to examine the effect of nitrogen on the yield and yield components of bread wheat varieties. The experiment was implemented in the 2019 and 2020 cropping seasons at Sekota and Lasta districts on the farmers’ field. The treatments consisted of a factorial combination of four levels of nitrogen (0, 46, 69, and 92 kg ha-1) and two varieties of wheat (Sekota-1 and Hibst), which were replicated three times in a randomized complete block design. Each treatment was provided with 23 kg ha-1 triple supper phosphate (P2O5). The study’s results indicated that grain and yield-related traits were significantly affected by nitrogen application. The increasing rate of nitrogen up to 92 and 69 kg ha-1 increases wheat grain and biomass yield by (150.3% and 54.1%) and (95.9 and 60%) in Sekota and Lasta districts, respectively. The highest grain yield (2562 and 2980 kg ha-1) was obtained from applying 92 and 69 kg ha-1 N at Sekota and Lasta, respectively. Therefore, applying 92 and 69 kg ha-1 N is the appropriate rate and recommended for the Sekota and Lasta districts, respectively
Effect of Coffee Ages and Shade Types on Soil Moisture and Soil N, P, K Availability in UB Forest
Full text linkWater and nutrients is important for plant which has its characteristics. This study has been carried out in the UB (Brawijaya University) forest about soil moisture content during rainy and dry seasons, Total-N, -P, -K from litter on different types of shade and age of coffee plants, and their effect on soil Available-N, -P, and -K. There are P1 (control), P2 (4-year-coffee + pine), P3 (7-year-coffee + pine), P4 (4-year-coffee + mahogany), and P5 (7-year-coffee + mahogany). These treatments affected to total soil moisture storage, Total-N, -P, -K of litter, and Available-N, -P, -K in the soil. The soil moisture storage change between rainy and dry seasons was 36.97 mm. The highest Total-N, -P, and -K of litter was 11.00 kg ha-1 y-1 at P3, 1.06 kg ha-1 y-1 at P2, and 4.35 kg ha-1 y-1 at P3, which was inconsistently associated with high soil nutrients. The highest Total-N was 0.40 (0-20 cm), 0.27 (20-40 cm), 0.30% (40-60 cm) at P4, Available-K was 1.69 (0-20 cm), 1.64 (20-40 cm), 1.87 cmol kg-1 (40-60 cm) at P5, and Available-P was 15.21 (0-20 cm), 14.06 (20-40 cm), 12.64 mg kg-1 (40-60 cm) at P1
Increasing the Growth and Yield of Soybean Genotype in Dryland by Applying Vesicular Arbuscular Mycorrhiza (VAM) and Tricho-compost
Full text linkThis research aimed to examine the increase in growth and yield of soybean (Glycine max (L.) Merr) genotypes in the application of Vesicular Arbuscular Mycorrhizae (VAM) and tricho-compost in dryland. This research was conducted in the form of an experiment using a Split plot design was composed: all treatments were given NPK fertilizer at a dose of 50% of the recommended dose and 5 g of mycorrhizae (Glomus sp. + Gigaspora sp. + Acaulospora sp.). The main plot (MP) had six genotypes (G). The sub-plot (SP) was mycorrhizae +tricho-compost (T): mycorrhizae +without tricho-compost (t0), mycorrhizae +tricho-compost 50 g plant-1 (t1 ), and mycorrhizae +2tricho-compost 100 g plant-1 (t2 ). The results showed that soybean genotypes gM50Gy, gO50Gy, and gT50Gy have the stability of agronomic characteristics on the shoot dry weight, root dry weight, and soybean dry weight in the adaptation test in dryland. The treatment of tricho-compost 100 g ton-1 had the highest increased shoot dry weight, root dry weight, percentage of mycorrhizal infection, and Nitrogen (N), Phosphorus (P), and Potassium (K) uptake. The interaction of gT50Gyt2 ; gO50Gyt2 and gTt2 resulted in higher root dry weight and N, P, and K uptake than gM50Gyt2; gMt2; gOt2
Growth and Yields of Upland Rice (Oryza sativa L.) Applied by Synthetic Zeolite and Catfish Liquid Organic Fertilizer
Full text linkThe average productivity of upland rice in Indonesia is around 4.4 tons per ha, significantly lower than its potential yield of 8.5 Mg per ha. The utilization of synthetic zeolite as a soil amendment and liquid organic fertilizer (LOF) is one of the technologies that can be applied to increase the growth and yield of upland rice. This study was carried out by factorial experiment with 2 factors: synthetic zeolite application at 4 levels (0, 100, 150, and 200 kg per ha), and catfish LOF application at 3 levels (0, 200, and 400 ml per clump), and each combina- tion was repeated three times. The results showed that applying synthetic zeolite and catfish LOF at each dose had no significant effect on plant height, maximum number of tillers and productive tillers, panicle exit age, harvest age, and weight of milled dry grain per clump. The interaction of synthetic zeolite at a dose of 100 kg per ha with catfish LOF at a dose of 400 ml per clump increased the number of pithy grains per panicle by 70%, the weight of milled dry grain per clump by 68%, and the harvest index 37.5% significantly compared to control (no treatment)
Performance The Red Onion (Allium ascalonicum L.) by Husk Charcoal and Fertilizer K Application
Full text linkThe cultivation of Red Onions (Allium ascalonicum, L.) in paddy fields needs to be investigated further because paddy fields have constraints on the soil physical and chemical properties, such as soil structure, drainage, pH, and nutrient availability. The application of husk charcoal and K fertilizer is expected to increase the productivity of Red Onions, so it is necessary to study the appropriate dose. The research aimed to determine the effect of the interaction between the application of husk charcoal and KCl fertilizer and the influence of each factor on the growth and yield of Red Onions. The results showed that rice husk charcoal treatment at a dose of 20 Mg ha-1 was effective in increasing the growth and yield of Red Onions compared to rice husk charcoal at a dose of 10 Mg ha-1 and 0 Mg ha-1 (control), as evidenced by the variable shallot plant height, number of leaves, number of tubers per clump, wet tuber weight per clump, and tuber dry weight per clump. KCl fertilizer treatments at doses of 100 kg ha-1, 200 kg ha-1, and 300 kg ha-1 did not significantly affect to growth and yield of Red Onions. There was not interaction between the rice husk charcoal and KCl fertilizer treatments
Dynamics of Tropical Peatlands Characteristics and Carbon Stocks as Affected by Land Use Conversion and Ages of Land Use in Riau Province, Indonesia
Full text linkThe dynamics and patterns of relationships between the characteristics of Indonesian tropical peat involving a function of time (ages of land use) in the context of land conversion have yet to be widely reported. The effects of tropical peatland use change are generally discussed regarding C emissions, with the limited literature identifying dynamic soil characteristics as these changes occur. This study used a survey method. We identified the physical, chemical, and C stock characteristics of peat in forest locations, oil palm plantations with a land use age of 0-5 years,>5-10 years,>10 years, and agricultural land with a land use age of 0-5 years and >5-10 years to find out the dynamics of soil characteristics. Land use changes from peat swamp forests to oil palm plantations and agricultural land, and the longer age of land use results in an increase in BD (especially at the top layer), ash content, pH, Total-N, total-P2O5, total-K2O, but there was a decrease in water content, fiber content, Organic-C, E400/E600, and soil C stocks. The alignment of economic, social, and ecological interests was directed to water and land management by regulating the area’s hydrological system and increasing peat stability