Jurnal Lahan Suboptimal : Journal of Suboptimal Lands
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Diversity of Plant Visiting Insects of Intercrop Lantana camara in Oil Palm Plantation
No full textRefugia 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
The Application of Compost Extract and Biopesticide in Three Different Varieties of Soybean (Glycine max L.)
No full textSoybeans 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
Accumulation Levels of Available Cu and Cu Absorption in Corn in Ultisolss and Alfisolss After the Addition of Fly Ash and Organic Materials
No full textFly ash was a byproduct of burning coal in thermal power plants that can be used in agriculture as a source of micronutrients. This study aimed to determine the effect of fly ash combined with Biochar and Manure on the chemical properties of the soil, plant growth, and the absorption of Cu corn plants. The study design used a randomized design of factorial groups, with soil type factors namely Alfisols and Ultisols with three repeats. Agronomic observations include plant height, dry weight of roots and headers. Laboratory analysis includes preliminary soil, Fly Ash, Manure, Biochar, soil analysis after harvest, and Cu in leaf. The results showed that the availability of Cu elements in Ultisols was higher by 5.37 mg/kg than Alfisols with an average of 3.90 mg/kg. Cu absorption in maize crops grown in Alfisols soil was greater with an average of 54.7 mg/g when compared to those planted in Ultisols soil by an average of 50.3 mg/g. The treatment between Fly Ash and Manure in a ratio of 1:1 has a tendency to increase Cu absorption with a value of 68 mg/g. Alfisols soil was significantly correlated with organic matter to Cu absorption in Corn plants with a value of R= 0.827. The conclusion of this study was that the availability of Cu elements in Ultisols soil was higher than in Alfisols soil and Cu uptake in corn plants was lower after being treated with the addition of manure and Biochar and corn plant growth was better
Monitoring of Butterfly Abundance in the Urban Forests of Cibubur Arboretum and University of Indonesia
No full textResearch related to biodiversity that was carried out regularly could be part of monitoring activities to see changes in butterfly populations in an area. Butterflies have a role as environmental bioindicators that were commonly found in various places. Urban forests such as the Cibubur Arboretum and the University of Indonesia were mini conservation sites that were habitats for butterflies. The purpose of this study was to monitor changes in butterfly abundance in the urban forest of Cibubur Arboretum and UI. This research was conducted in 2014 and 2021. This observation was carried out by purposive sampling method. Each urban forest was divided into 3 different stations consisting of 2 plots (20 x 20 m), and repeated 3 times on each plot with an interval of 1 week using a sweeping net and camera. Observations were carried out for 1 hour on each plots. The total observations of butterflies in both urban forests were 18 times. Individual butterflies found in 2014 in the Urban Forest Arboretum Cibubur (339) individuals, and the year 2021 (232) individuals. in the UI City Forest in 2014 898 individuals were found and 269 individuals in 2021. Nymphalidae family was the family with the highest number of individuals found in 2014 and 2021. The individual species found in 2014, included in the category of sporadic, subrecedent, recedent, subdominant and dominant. Meanwhile, the butterfly species found at the study site were categorized into Sub-recedent, Recedent, and Sub-dominant groups in 2021. Differences in vegetation, changes in use, and anthropogenic disturbances could affect changes in butterfly observations
Revegetation of Tropical Peat Swamp Forest of Former Fires Using Local Tree Species in South Sumatra (Indonesia)
No full textRevegetation 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
Utilization of Jengkol (Pithecellobium jiringa) Peel Biochar and Chicken Manure as Organic Fertilizer on Red Chili Plants (Capsicum annum L) in Acidic Dry Land
No full textChili (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 Effects of Shading and Organic Domestic Waste on Brazilian Spinach Growth
No full textThe use of household waste in the form of rice washing water, pineapple skin waste, and leftover rice as liquid organic fertilizer (LOF) has the potential to create a good growing medium so as to increase plant growth. Brazilian Spinach (Alternanthera sissoo) is a leafy vegetable that has the potential to diversify vegetable consumption in urban areas where it is expected to grow well in tight spaces, particularly under shading. This study aimed to find out the effects of applying liquid organic fertilizer made of household waste and the shading on the growth of the Brazilian spinach plant. The study used a split plot design with a main plot consisted of 0%, 50% and 70% shading, while subplot consisted of LOF washing water (20 ml/l), pineapple peel waste (30 ml/l) and leftover rice (50ml/l). Each treatment was repeated 3 (three) times. The results of the study showed that the SPAD value of Brazilian spinach under shading treatment and LOF treatment of rice washing water linearly continued to increase until 8 (eight) weeks after planting. Regarding the vegetative growth of Brazilian spinach, the 0% shading treatment was the best treatment in terms of increasing the non-edible leaf fresh weight and root dry weight. Meanwhile, the LOF had an insignificant effect on all treatments. In conclusion, Brazilian spinach can grow more optimally in no-shade conditions
Pakcoy's (Brassica rapa L.) Response to the Provision of Liquid Organic Fertilizer in Polybags
No full textThis study aimed to examine the effect of Liquid Organic Fertilizer (LOF) in increasing the growth and yield of pakcoy, as well as obtaining LOF concentrations that provided the best growth and yields of pakcoy plants. It was conducted at the Teaching and Research Farm, Faculty of Agriculture, University of Jambi, 35 asl. The study used a Randomized Block Design with one factor, namely various LOF concentrations: 0ml/l; 5ml/l; 10ml/l, 15ml/l. Each treatment was repeated five times. The results showed that LOF application was able to increase the growth and yield of pakcoy plants in the form of plant height (4.94%–24.49%), number of leaves (4.63%–9.26%), leaf area (18.17%–46.12%), dry weight (50.98%–94.90%), and plant fresh weight (50.46%–102.60%). The LOF concentration of 10ml/l provided the best pakcoy growth and yield. The results of this study have just been able to produce a fresh weight of pakcoy 26%–33% of the potential pakcoy yield
Growth and Yield of Red Chili at various Doses of Chicken Manure Using Conventional and Floating Cultivation Techniques
No full textThe aimed of this study was to determine the effect of chicken manure application on red chili plants using conventional and floating cultivation techniques. The research was carried out on the experimental farm for conventional cultivation techniques and in research pond for floating cultivation located in the Faculty of Agriculture, Sriwijaya University, Indralaya Campus, Ogan Ilir, South Sumatra with an altitude of 10 m above sea level from July to November 2022. The experiment used a randomized block design with one factor, namely chicken manure (0, 10, 20 and 30 tons/ha) with three replications. While the floating experiment used 200 cm x 100 cm of bamboo rafts. Parameters observed included plant height, number of leaves, crown diameter, fruit length, fruit diameter, fruit weight per fruit, and total fruit weight per plant. Data were analyzed using Analysis of Variance (ANOVA) at the 5% level. The results showed that increasing the dose of chicken manure up to 30 tons/ha in both cultivation techniques increased plant height and number of leaves. Likewise for the number and weight of fruit, obtained at the same dose in conventional techniques, namely 30 tons/ha. However, fruit length and diameter parameters were higher in floating cultivation at all doses of chicken manure treatments. Therefore, it was concluded that the use of chicken manure could increase the growth of chili plants in both cultivation techniques, although the size of the polybags used could not support the growth and yields optimally
Study on Water Quality of Some Tributaries in Palembang City
No full textThe 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.