Jurnal Ilmu Pertanian Indonesia
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Distribusi Spasial Fitoplankton di Perairan Pesisir Tangerang
Get PDFThis study was conducted in describing the spatial distribution of phytoplankton in the coast of Tanggerang based on species composition and abundance. This study held on April and August 2013 in 10 sampling station. Sample survey method used to collect the data. Morisita Index of Dispersion used to describe the distribution pattern of phytoplankton and Bray-Curtis Index used to describe the similarity of sampling station based on its abundances of phytoplankton. Based on result of the study, the phytoplankton in the coast of Tangerang consist of three classes, which is Bacillariophyceae (24 genera), Dinophyceae (3 genera), and Cyanophyceae (2 genera). The result shows that the highest composition and abundance is from the species of Bacillariophyceae. The distribution pattern of phytoplankton is group distribution. The distribution of species of phytoplankton and its abundance is different even the sampling station is near each other and environmental parameters that influence
Kesesuaian dan Daya Dukung Wisata Pesisir Tanjung Pasir dan Pulau Untung Jawa
Get PDFThe objective of research was to determine the suitability and carrying capacity of Tanjung Pasir Coast and Untung Jawa Island for tourism. Research was conducted through survey descriptively and evaluative approaches to obtain primary data while secondary data also collected as supporting. The suitability of Tanjung Pasir Beach for tourism was 83.33% (highly suitable), Untung Jawa Beach 78.57 and 85.71% (highly suitable), mangrove 56.14% (suitable), but snorkeling 42.11% (not suitable) and 56.14% (suitable). Carrying capacity for tourism in the beach of Tanjung Pasir were 162 tourists/day, Untung Jawa 74 tourists/day, mangrove tourism 69 tourists/day, and snorkeling 20 tourists/day. However, the actual numbers of tourists in the region have exceeded the carrying capacity. Therefore, the control of tourists number is needed in order to match the carrying capacity of its environment as a management measure
Pemulihan Komunitas Karang Keras Pasca Pemutihan Karang di Amed Bali
Get PDFClimate change is now recognized as one of the greatest threats to worldwide coral reefs with one of the most serious and immediate threats of mass coral bleaching associated with increasing sea temperatures. Coral bleaching occurred in a few coral reefs throughout the world in 2010. Coral reef in Amed’s coastal area was the one of the reefs that experienced and affected by coral bleeching incident. This study aims to assess recovery of hard coral community in post-bleaching in 2010. A survey method was used to collect primary data. Data sets also supported by secondary data. This study results were hard coral community recovered in 2013, as its percentage cover increased up to 49.00%. However, macroalgae decreased up to 0.67%. Hard coral recruitment in 2013 increased up to 21 individual/m2
Diameter Substrat dan Jenis Lamun di Pesisir Bahoi Minahasa Utara: Sebuah Analisis Korelasi
Get PDFSubstrate has an important role for growing and surviving of seagrass as a medium of life and as a supplier of nutrients. Lack of attention towards seagrass is because of less information related to the seagrass ecology itself. The aim of this study is to determine the influence of substrate diameter with it’s density. The study was conducted in April in Bahoi coastal, North Minahasa District, North Sulawesi. This study measured water quality, substrate sampling were taken in the field. The result showed that 6 seagrass species: Enhalus acoroides, Thalassia hemprichii, Halodule uninervis, Cymodecea rotundata, Syringodium isoetifolium, Halpohila ovalis, with good water quality and sand substrate types. This coastal area was dominated by small-sized seagrass. The highest density was found at station B with seagrass type was S. isoetifolium and lowest was at station C with E. acoroides and Sand substrate which had big diameter, type T. hemprichii had high density
Penentuan Daya Dukung Perairan untuk Perikanan Alami (Studi Kasus: Situ Cilala, Kabupaten Bogor)
Get PDFThis study aimed to assess the aquatic carrying capacity for extensive fishing. The study was conducted in Cilala Lake, Jampang Village, Bogor. The carrying capacity was determined based on primary productivity using the chlorophyll value, which is indicating the existence of phosphate in waters. The result showed that carrying capacity of Cilala Lake for extensive fishing was 3.51 tons/year. Tilapia was the fish which could be restocked, because it has high tolerance to waters condition and there’s not prey or predator for this fish. If fish for restocking was assumed about 25 g in size and would be about 250 g after 46 months (harvest size), then the maximum stocked was 15.602 fingerlings/year for two periods. The number of fish pen cage available on the lake should be considered in calculating the number of fish for restocking
Analisis Strategi Peningkatan Daya Saing Komoditas Kentang di Kabupaten Karo, Sumatera Utara
Get PDFAsean Economic Community (AEC) has given a new challenges to Indonesia to maintain its products, include horticulture commodities, such as potato. One of potatoes production centers in Indonesia is Karo Regency, North Sumatera. The purpose of this study are to identify supply chain’s structures and internal-external factors to formulate strategies for increasing potato competitiveness in Karo Regency. Data analyzed by Descriptive analysis, TOWS, and Pairwise Comparison. The results of this study is there are four priority strategies for Karo Regency in increasing it competitiveness, such as: 1) Training farmers to improve farmer’s ability, independence, and institutional welfare through the establishment of Desa Percontohan; 2) Increasing the plant diseases treatment through the optimalization of agriculture clinic; 3) Improve farmer’s ability to work in collaboration with bussines partner through promotion of agricultural products; and 4) Increasing the development of potatoes’s superior seeds
Kelimpahan Wereng Hijau, Insiden Penyakit Tungro, dan Efektivitas Sumber Inokulum pada Ketinggian Tempat Berbeda
Get PDFRice Tungro disease is one of biotic constraint that can reduce yield potential of rice. Tungro disease viruses are transmitted from one plant to another by leafhoppers that feed on tungro-infected plants. The most efficient vector is the green leafhopper, Nephotettix virescens. Green leafhoppers (GLH) generally found in areas with high altitude and low temperature. However, GLH and tungro disease can be found in medium and low altitude areas. The aim of this study was to determine the abundance of green leafhopper, tungro disease incidence, and effectiveness of inoculum source in different altitude at endemic areas. Field observations conducted to observe tungro disease incidence and the density of GLH population. Moreover, greenhouse activities were conducted to examine the effectiveness of inoculum sources, including ratoon, spilled grain, weeds, and plants in the vegetative phase. The results showed there was no significant difference in the GLH population dynamics in upland areas represented by Garut and lowland areas represented by Purwakarta, both showed low population density. Ratoon, spilled grain, and plants in the vegetative phase were the effective inoculum sources to be used as host tungro viruses
Peran Penyuluh Kehutanan Swadaya Masyarakat (PKSM) dalam Membantu Masyarakat Mendapatkan Izin Hutan Kemasyarakatan (HKm) di Kecamatan Sendang Agung Kabupaten Lampung Tengah
Get PDFOne of the solutions to increase the community welfare and manage the forest is by giving the Social Forestry license. The implementation of community forest intend to give space for the local community for sustainable forest management. The submission of HKm license was done by farmers of HKm group who already received facilitaties from forestry partner that is Non-govermental Forestry Extension Worker (PKSM) to regent. The objectives of this research were to analyze the role of PKSM level for assisting farmer to obtain HKm license and analyze the correlation between external and internal factors of partner with their role. This research was done in Subdistrict Sendang Agung as an area under the jurisdiction of PKSM to assist submission of HKm license. The data was analized by Chi Square test, meanwhile to detect the correlation level of respondent factors with partner role is using coefficient contingency correlation analize. Based on analize result partner role level is obtained in high classification, partner role is as dynamist, mediator, facilitator, motivator, and educators. Internal factors companion that has a strong enough relationship with the role of companion is the number of dependents, long-serving, and cosmopilitaness, where as age, income, as well as information disclosure had uneasy relations. External factors companion that has a strong relationship with the companion role is recognition of the success and intensity of supervision, facilities have less close relationship level with the role of companion
Peningkatan Produksi dan Kualitas Daging Sapi Lokal Melalui Penggemukan Berbasis Serealia pada Taraf Energi yang Berbeda
Get PDFLocal beef cattle is still the major source of domestic beef consumption, yet their productivity and quality is relatively low. This study was aimed to investigate productivity and meat quality traits of local beef cattle through fattening using cereals based concentrate containing different energy level. Nine Ongole cattle with average initial liveweight of 254.67 ± 20.7 kg and age between I1-I2 permanent incisor teeth were used in the study. They were fattened for four months and alloted into three different energy rations; they were low (ER) 57.88% TDN, medium (ES) 63.72% TDN, and high (ET) 69.67% TDN. The three rations had simmilar protein contents, between 12.42-12.96%. Observed parameters included cattle performance (ration and nutrition dry mater intake, daily gain, and feed conversion), carcass traits (carcass weight and percentage, fat thickness, and loin eye area at the 12th rib), and meat quality traits (pH, water holding capacity, tenderness, cooking loss, marbling score, and meat color). The results showed that cattle fed with high energy (ET) ration had the highest body weight and marbling score, and more efficient in feed conversion than medium (ES) and low energy (ER) rations. Local beef cattle productivity and there meat quality could be improve through fattening using high energy cereals based concentrate
Efek Penambahan Mineral Zn Terhadap Gambaran Hematologi pada Anak Sapi Frisian Holstein
Get PDFThe objective of this experiment was to determine the effects of zinc supplementation on health status in dairy calves. Nine Frisian Holstein (FH) at 6-10 months of age were used in this experiment and divided into three groups. First group (no added Zn) for control, the second group was added 60 ppm Zn, and the third group was added 120 ppm Zn. Zn was administered daily for three months. Blood samples were collected from the jugular vein and anticoagulated with EDTA. Whole blood were used for measuring erythrocytes, hemoglobin concentration, hematocrit value, total leukocyte count, and leukocyte cell types. The results showed that no difference among groups for hematological parameters and the value of hematology were in the range values references. In conclusion, 60 and 120 ppm Zn supplementation in the feed is relatively safe for health