Jurnal Ilmu Pertanian Indonesia
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Kaitan Struktur Komunitas Fitoplankton dengan Konsentrasi Nutrien dan Kekeruhan di Waduk Kedung Ombo
Full text linkWaduk Kedung Ombo banyak dimanfaatkan masyarakat sebagai sarana irigasi, sumber air minum, pembangkit tenaga listrik, pariwisata, dan KJA. Limbah bahan organik berupa sisa pakan dan kotoran ikan dari KJA menjadi isu utama terhadap penurunan kualitas perairan. Hal ini berdampak pada keragaman fitoplankton sebagai produsen primer di perairan. Penelitian ini bertujuan untuk mengetahui konsentrasi nutrien dan kekeruhan, keragaman dan struktur komunitas fitoplankton, serta kaitan nutrien dan kekeruhan dengan keragaman fitoplankton. Sampling dilakukan 3 kali dengan interval waktu 1 bulan di 3 stasiun yang berbeda. Hasil penelitian menunjukkan bahwa konsentrasi nitrat berkisar antara 0,2 – 0,7 mg/L; fosfat 0,1 – 0,87 mg/L; dan kekeruhan 3,52 – 20,18 NTU. Keragaman fitoplankton berkisar antara 17.882 – 90.280 sel/L dengan indeks keanekaragaman rendah, indeks keseragaman tinggi, dan indeks dominansi rendah. Terdapat korelasi yang kuat antara nutrien dan kekeruhan terhadap keragaman fitoplankton dengan nilai r = 0,800 dan R2 = 0,640. Keragaman fitoplankton dipengaruhi oleh nutrien dan kekeruhan sebesar 64%, sedangkan sisanya 36% dipengaruhi oleh faktor lain.
Kata kunci: fitoplankton, kualitas air, nutrien, waduk kedung omb
Strategi Meningkatkan Daya Saing Bawang Merah Melalui Prediksi Harga
Full text linkShallots contribute significantly to the formation of food commodity inflation caused by high price fluctuations. Precise price forecasting is vital for all agribusiness actors, from farmers, traders, and consumers to production and inventory management. This research aims to identify the forecasting prices for shallot producers and consumers and formulate strategies to increase the competitiveness of shallots. This research uses the SARIMA method to capture seasonal elements in the data. The data used is time series data on shallot prices at the consumer and producer levels from January-November 2021. Determining the best SARIMA model uses the auto-arima technique, which shows that the best SARIMA for shallot prices at the producer level is ARIMA (2,1,2)(2,0,0)[12]. In contrast, the price of shallots at the consumer level is ARIMA (5,1,1)(1,0,1)[12]. The prediction results show that the dynamics of shallot prices in the future will continue to follow seasonal patterns as in previous years, namely, high prices during the lean season and religious holidays and low prices during the harvest season. The government needs to strengthen its policy of stabilizing shallot prices at both consumer and producer levels. Availability of agricultural inputs, adoption of technology for post-harvest and marketing, value-added innovation, and infrastructure improvements are strategic efforts to strengthen the competitiveness of shallots.
Keywords: consumer price, price fluctuation, producer price, shallo
Peningkatan Keterampilan Praktik Pertanian yang Baik Petani Sawit Swadaya di Kabupaten Sambas
Full text linkGood oil palm cultivation contributes to the progress of the national economy by earning foreign exchange and income, creating jobs, and increasing welfare. However, independent palm oil farming has low productivity and quality due to limited knowledge and skills of GAP (Good Agriculture Practices). The research aims to formulate improvements in GAP skills, including technical skills, human skills, and conceptual skills, using skills theory and the concept of sustainability. The research method was descriptive-quantitative with Multidimensional Scaling using the Rap-Palm Oil program on 100 respondents in Sambas Regency, one of the centers of independent oil palm smallholders in West Kalimantan. The results showed that conceptual skills through extension activities are prioritized in improving GAP skills. Therefore, counseling methods through demonstration plots, comparative studies, and field schools can be an effort to improve GAP skills for sustainable management of oil palm farming.
Keywords: good agriculture practices, multidimensional scaling, palm oil, skill
Potensi Trichoderma sp. Indigenus Gorontalo sebagai Dekomposer Limbah Tanaman Jagung
Full text linkUsing decomposers of fungi to increase the composting process is very necessary. The research aims to determine the potential of Trichoderma sp. Gorontalo local isolate as a decomposer of maize stover. The research was carried out from November 2022‒January 2023 at the Biological Agents Laboratory, Agricultural Plant Protection Center, Gorontalo Province Agricultural Department. This research determined the ability of six isolates of Trichoderma, namely TZ11DI1 (T. asperellum), TZ21BN2 (T. breviconvenctum), TZ21BT1 (T. virens), TZ12PO1 (T. ghanence), TZ21DU1 (T. reesei), TZ21LU1 (T. dorothopsis), and control (EM4) to produce cellulase and as a maize stover decomposer. The parameters observed were the clear zone in the isolate growing media as well as the physical and chemical characteristics of the compost produced. The results showed that Trichoderma isolates produced cellulase and potential as a decomposer for maize stover, as indicated by the ability to increase NPK nutrient levels and reduce the C/N ratio of maize stover compost.
Keywords: compost, decomposer, maize stover, Trichoderm
Isolasi, Identifikasi, dan Produksi Miselia Rhizopus sp. Berkadar Asam Nukleat Rendah untuk Pengembangan Mikoprotein
Full text linkFungi, including Rhizopus sp., are food sources that commonly contain high nucleic acid levels. Therefore, the nucleic acid content must be reduced to achieve health standard requirements. This study aimed to isolate, identify, and produce Rhizopus sp. mycelium containing low nucleic acid. The Rhizopus spp. were isolated from tempeh collected from 12 different areas in Indonesia. Fungal identification was conducted based on morphological characteristics. The fungal isolates were selected based on mycelial growth and spore production on PDA. Biomass production of mycelium was carried out in potato extract and soybean extract media obtained from 200 g/L and 333.3 g/L, respectively. In each medium, 6 sugar levels were added, namely 0, 2, 3, 4, 5, and 6 g/L. Mycelium nucleic acid content reduction was achieved by heat treatment at 50°C and 60°C for 15 minutes and measured by a spectrophotometer at 260 nm. Fifty-eight isolates that were identified into 3 species were obtained in this experiment: R. oryzae, R. stolonifera, and R. microsporus. R. Microsporus had higher mycelium biomass and lower spore number than the other species. R. Microsporus produced a higher mycelium biomass in the soybean extract medium with 5 g/L additional sugar. The nucleic acid content of the 50°C heat-treated mycelium was 1.82% and 1.73% at 65°C. These values fulfilled the standard of mycelial nucleic acid content permitted in food by the USDA.
Keywords: morphology, Rhizopus microspores, spore, soybean extract, tempe
Eksplorasi, Identifikasi, dan Karakterisasi Nematoda Entomopatogen Pada Lahan Jagung dan Padi
Full text linkEntomopathogenic nematodes (EPN) are potential nematodes as biological agents because they actively search for insect pests and are parasitic on their hosts. Two genera of EPN can be used as biological agents: Steinernema and Heterohabditis. It is necessary to explore local EPN on land suspected of having potential as a habitat for the nematodes. This study aimed to determine the genus and population of the EPN from corn and rice farms in Jember by identifying and characterizing them. The method used was the descriptive method. The EPN population was analyzed using the T-test. The results showed that the EPN from the corn and rice fields belonged to the Steinernema genus. EPN from the corn field isolate was characterized by a body length of 826,77 μm, body width of 47.14 μm, and tail length of 73.16 μm, while from the rice field, the isolate was characterized by a body length of 840.54 μm, body width of 37.70 μm, tail length 57.52 μm. EPN populations in maize and rice fields were not significantly different.
Keywords: exploration, entomopathogenic nematodes, Steinernem
Variasi Spasial Kepadatan Cacing Kacang di Pantai Toronipa Sulawesi Tenggara
Full text linkThe density of peanut worms is concentrated in the subtidal zone and is closely related to the substrate where they live. This research aims to determine spatial variations in peanut worm density. This research was carried out at Toronipa Beach, Southeast Sulawesi from June 2020 to February 2021. Peanut worms were collected using a hand scoop to a depth of ±10 cm in a 10x10 m2 quadrat transect at each station. Data were analyzed using standard formulas and tested using Mann-Whitney and linear regression. The results showed that the highest density of peanut worms was found at station II with a mean value of 12±104 ind/10m2 which was significantly different from stations I and III with densities of 9±52 ind/10m2 and 7±124 ind/10m2 respectively. Five types of seagrass were identified, namely Cymodocea rotundata, Enhalus acoroides, Halodule uninervis, Halophila minor, and Thalassia hemprichii. The number of seagrass species found at stations I, II, and III were 1, 2, and 5, respectively. Peanut worm density was positively correlated with seagrass density with a coefficient of determination of 86.45%. Water quality tends to be the same at all stations, except that organic matter is higher than at stations I and II. The dominant fine sand fraction was found at stations I and III, while very coarse sand was dominantly found at station II. The density of peanut worms on Toronipa Beach is determined by a combination of seagrass density, high levels of organic matter, and the dominant texture of the coarse sand substrate.
Keywords: peanut worm, spatial density, Sulawesi, water qualit
Studi Fisika Tanah pada Budi Daya Tembakau (Nicotiana tabacum L) di Berbagai Kemiringan Lahan
Full text linkThe percentage of slope classes on a land has an impact on changes in soil physics. The purpose of this study is to evaluate the physical properties of soil planted with tobacco on various slopes in Kenagarian Situjuah Batua, Situjuah Limo Nagari District, Lima Puluh Kota Regency. The method used in this study was a survey; samples were taken purposively based on slope classes at slopes 8-15%, 15–25%, and 25–45% at depths of 0–20 cm and 20–40 cm. From each slope 3 repetitions were taken. The results showed that there were changes in soil physics properties in each slope class with the dominant texture of sandy clay loam. Organic matter was classified as high to low (18.77–3.63%), low soil buld density (0.66–0.34 g/cm3), and total pore space was classified as high (75.27–86.87%). The permeability of the soil was classified as very fast to somewhat slow (34.88–0.78 cm/h), and the aggregate stability index was somewhat steady to less steady (60.89–45.98%). It is recommended that tobacco farmers to make terrracing and cut the length of the slope so that it does not lose organic matter.
Keywords: soil physical properties, slope level, tobacco plantatio
Hubungan Skor Perototan Ayam Betina Pembibit dan Performa Produksi
Full text linkOne think In the Parent Stock breeder farm is Scoring Fleshing in growing periode The purpose of this study was to examine the effect of the fleshing score on the production performance of parent stock hens and find problems in the form of deviations from the fleshing score along with evaluations, solutions, and improvement plans. The benefit of this research is to provide information and guidance for farm supervisors and managers regarding target fleshing. Measuring the fleshing score is done by directly measuring the thickness of the chicken breast muscles. The number of samples taken is 5% of the total population ( COBB 2022 ). The data processed by excel 2021 and descriptive analised in order to same with the filed. Fleshing score aims to maintain and monitor body weight so that it is maintained, not to be overweight or otherwise the chickens become too thin. Good fleshing will produce enough fat reserves. This fat reserve is useful for preparation before production. The next hope is that with sufficient fat reserves during production, peak production will be high and production performance will be more persistent. Hens in coops that achieve an ideal fleshing score (less fleshing score 2) in the growing period tend to show better performance during the laying period, lower depletion of laying, higher peak production, higher cumulative PE, and higher cumulative HE.
Keywords: flashing score, parent stock, production performanc
Red Dragon (Hylocereus polarizes) Fruit Peel Herbal Tea with The Addition of Cinnamon, Ginger, and Orange Zest
Full text linkThe peel of dragon fruit is a waste. The meat of dragon fruit is the most frequently consumed; the peel is rarely used and is only wasted. The natural antioxidant lycopene may be found in the skin of dragon fruit. Dragon fruit skin can be processed to make herbal tea. This study aims to ascertain the yield, moisture content, and organoleptic testing to produce dragon fruit peel tea and the effects of adding cinnamon, ginger, and lemon zest. The research treatments included lemon zest at 40%, ginger at 14%, and cinnamon at 6% concentrations. Three treatment levels and three replications were employed in the fully randomized design (CRD) for data analysis. According to the study\u27s findings, the best way to treat a dragon fruit peel herbal tea bag that contains 6% cinnamon powder was to know how adding cinnamon, ginger, and lemon zest to the process of making dragon fruit peel tea affects the yield, moisture content, and organoleptic test. According to the respondents\u27 liking, the taste test scored 3.91%, scent 3.88%, and color 4.45% (loved) (liked). Based on SNI 3836.2013 about tea quality criteria, which stipulates that the maximum moisture content included in tea powder is 8%, a yield of 8.64%, and a moisture content of 0.48% satisfy the tea quality requirements.
Keywords: dragon fruit peel, cinnamon, ginger, lemon zest, red dragon fruit peel te