Morphological and agroecological study of Purwoceng Gunung (Artemisia lactiflora wall.) in areas slopes of mount Lawu

Abstract This study aims to determine the distribution pattern, morphological and agroecological characteristics of Purwoceng Gunung. The research location on the slopes of Mount Lawu, around the Grojogan Sewu, Tawangmangu sub-district. The sampling point was determined based on purposive random sampling through a pre-survey. Determination of sample plots and analysis of vegetation using the transect (line) method. The results showed that the stem shape was round and segmented, smooth surface and green, oval leaf shape with serrated edges, compound leaves, pointed leaf tip, blunt leaf base, green leaf color with a length of 4 cm and a width of ± 2 cm. The location of the flowers at the end of the stem and classified as compound interest, fibrous roots with yellowish white color. The distribution pattern of Purwoceng Gunung was uniform with low population density of 6 individuals per plot and an INP of 4.4. Habitat agroecological conditions with climate type C with the following soil chemistry: C organic 5.8%, organic matter 9.9%, N 0.27 %, P 16.04 %, K 0.27 %, pH NaF 9.02, pH H2O 6.1, CEC 26, 9 me 100 g-1, field capacity 43.9. The proportions of dust, clay and sand were 27.4%, 9.4% and 63.2% respectively.

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Analisis Hubungan Kelimpahan Plankton di Permukaan Terhadap Hasil Tangkapan Ikan Lemuru (Sardinella lemuru) di Selat Bali

Journal of Marine and Aquatic Sciences ◽

10.24843/jmas.2018.v4.i01.151-161 ◽

2017 ◽

Vol 4 (1) ◽

pp. 151

Author(s):

Hasanuddin Parulian Sihombing ◽

I Gede Hendrawan ◽

Yulianto Suteja

Keyword(s):

Sampling Method ◽

Strong Relationship ◽

Zooplankton Abundance ◽

Sampling Point ◽

Water Sampling ◽

Phytoplankton Abundance ◽

Fish Food ◽

Area Sampling ◽

The Relationship

Lemuru fish is one of fishery commodity that has high economical value and one of fish that most catched by fisherman in Bali Strait. Lemuru fish had been caught in Bali Strait was fluctuating every month and every years. This condition was related with food source of Lemuru fish such as phytoplankton and zooplankton. So this research was conducted to explained the relationship phytoplankton and zooplankton abundance with Lemuru fish catched in Bali strait. This study focus in Bali strait during March until May 2017. Determination of sampling point used area sampling method while water sampling occured in surface water with pouring method. Total of phytoplankton and zooplankton abundance in Bali strait in March until May had formed the sinusoidal model with their abundance ranged 301 ind/L – 604 ind/L and 7 ind/L – 12 ind/L. Plankton abundance in Bali strait in March until May (transisonal season 1) was categorized low abundance if compared with plankton abundance in another season. The low value of phytoplankton abundance caused by non upwelling phenomenon and grazing process and the low abundance of zooplankton caused by low rate of zooplankton and predation by Lemuru fish. Phytoplankton and zooplankton abundance had strong relationship with Lemuru fish catched with correlation coefficient value 0.76 and 0.69. This condition caused by phytoplankton and zooplankton are source of Lemuru fish food.

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PENENTUAN WAKTU TANAM PADI SAWAH DI KABUPATEN SANGIHE DENGAN MENGGUNAKAN MODEL SIMULASI SHIERARY RICE

EUGENIA ◽

10.35791/eug.21.3.2015.9696 ◽

2015 ◽

Vol 21 (3) ◽

Author(s):

Farida Fattah ◽

J. E.X. Rogi ◽

Mariam M. Toding

Keyword(s):

Cost Savings ◽

Simulation Models ◽

Field Capacity ◽

Paddy Rice ◽

Yield Potential ◽

Potential Yield ◽

Planting Time ◽

The North ◽

Humidity Field

ABSTRACT Decline in rice production in Sangihe Island partly due to climate change and the implementation of a less precise planting time. Rice Shierary model was used to predict the timing of planting paddy and has advantages in time and cost savings. This study aims to determine the exact time of planting in paddy rice crops in the district of South Manganitu, North Tabukan and Tamako, as well as to determine whether the results of the simulation model Shierary Rice together with the results obtained from the Central Bureau of Statistic Sangihe Islands. Input model consists of solar radiation, rainfall, temperature and humidity, field capacity, permanent wilting point, varieties, irrigation, nitrogen fertilization, longitude and latitude of the study area. While the output was paddy rice yield potential. It can be concluded that (a) the appropriate planting time of paddy in the South Manganitu namely in June with a potential yield of 4.25 tonha-1 and March with a potential yield of 3.88 tonha-1. (b) the appropriate planting time of paddy in the North Tabukan namely in June with a potential yield of 4.27 tonha-1 and March with a potential yield of 3.62 tonha-1. (c) the appropriate planting time of paddy in Tamako ie in March with a potential yield of 3.58 tonha-1 and February with a potential yield of 3.28 tonha-1. (d) the yield of rice field paddy with the determination of planting time by using the model of Shierary Rice nearing/line with productivity results which obtained by the Central Statistics Agency (BPS) Sangihe Islands. Keywords: planting, paddy, simulation models, Shierary Rice

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Pola Distribusi Aboveground Biomass Kawasan Hutan Mangrove Peniti Kalimantan Barat

Life Science ◽

10.15294/lifesci.v8i1.29984 ◽

2019 ◽

Vol 8 (1) ◽

pp. 1-9

Author(s):

Rafdinal Rafdinal ◽

Rizalinda Rizalinda ◽

Sukal Minsas

Keyword(s):

Distribution Pattern ◽

Aboveground Biomass ◽

Random Sampling ◽

Analysis Data ◽

Mangrove Ecosystem ◽

Mangrove Forests ◽

Vegetation Analysis ◽

Conceptual Approach ◽

West Kalimantan

This study aims to analyze the distribution pattern of aboveground biomass (AGB) in the mangrove ecosystem of West Kalimantan Safety. In addition, it also analyzes the differences in biomass and carbon stocks in the condition of mangrove forests. The study of the distribution pattern of AGB of mangrove forests was carried out between August and September 2018. Determination of the location of the study was based on a conceptual approach in the dimensions of spatial temporal that is using the Porposive Random Sampling method. Vegetation analysis was carried out by a single plot measuring 50 m x 50 m at each selected location. Based on vegetation analysis data it was found that the density of mangrove stands on the Peniti coast ranged from 38 to 185 ind /ha, with an average of 88.25 ± 66.15 ind./ Ha. The AGB of pinch mangrove forests ranged from 8.85 to 84.82 Mg / ha with the largest total AGB distributed in the stand diameter class of more than 80 cm. Penelitian ini bertujuan untuk menganalisis pola distribusi aboveground biomass (AGB) pada ekosistem mangrove Peniti Kalimantan Barat. Selain itu juga untuk menganalisis perbedaan biomassa, dan cadangan karbon pada kondisi hutan mangrove. Kajian pola distribusi AGB hutan mangrove Peniti dilakukan antara bulan Agustus dan September 2018. Penentuan lokasi penelitian didasarkan pada pendekatan konseptual dalam dimensi spasio temporal yaitu menggunakan metode Porposive Random Sampling. Analisis vegetasi dilakukan dengan metode petak tunggal berukuran 50 m x 50 m pada setiap lokasi terpilih. Berdasarkan data analisis vegetasi didapatkan bahwa kerapatan tegakan mangrove di pesisir Peniti berkisar antara 38 sampai 185 ind/ha, dengan rata-rata 88,25±66,15 ind./ha. AGB tegakan hutan mangrove Peniti berkisar antara 8,85 sampai 84,82 Mg/ha dengan total AGB terbesar terdistribusi pada kelas diameter tegakan lebih dari 80 cm.

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Determination of Tiamulin in Type C Medicated Swine Feeds Using High Throughput Extraction with Liquid Chromatography

Journal of AOAC International ◽

10.1093/jaoac/85.3.533 ◽

2002 ◽

Vol 85 (3) ◽

pp. 533-540 ◽

Cited By ~ 3

Author(s):

Douglas B Moore ◽

Nancy L Britton ◽

Robert L Smallidge ◽

Ken L Riter

Keyword(s):

Liquid Chromatography ◽

Mobile Phase ◽

Test Results ◽

Improved Method ◽

Mobile Phase Composition ◽

Significance Level ◽

Paired Sample ◽

Recovery Study ◽

Type C

Abstract An improved method for extraction and analysis of tiamulin is presented to address issues that arose during routine analysis of Type C medicated swine feeds under the current U.S. Food and Drug Administration-Center for Veterinary Medicine (FDA-CVM) approved method. The issues included the need for higher sample throughput and the ability to accommodate a wider variety of feed matrixes. Changes to the FDA-CVM approved method include reduced sample size and solvent volumes, phosphate buffering of tartaric acid, centrifugation, and use of a new liquid chromatography column and adjusted mobile phase composition. A paired sample study was performed to compare performance of the new and existing methods. The paired sample study showed no statistical difference between sample means of paired sets of 17 samples analyzed by both methods (t = 1.95 at 0.05 significance level, p = 0.068). A recovery study showed the method precision to be 2.06% (coefficient of variation) with an average standard recovery of 95.8%. Ruggedness test results indicated good overall ruggedness of the method.

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BIOCHEMISTRY OF THE USTILAGINALES: XIV. BIOASSIMILATION OF L-ERYTHRULOSE INTO 4-O-β-D-MANNOPYRANOSYL-D-ERYTHRITOL

Canadian Journal of Biochemistry and Physiology ◽

10.1139/y60-118 ◽

1960 ◽

Vol 38 (1) ◽

pp. 953-956

Author(s):

P. A. J. Gorin ◽

R. H. Haskins ◽

J. F. T. Spencer

Keyword(s):

Distribution Pattern ◽

Carbon Fragment

L-Erythrulose-1-C14 and -4-C14 were used as precursors in the biosynthesis of 4-O-β-D-mannopyranosyl-D-erythritol. The ketose was utilized efficiently and the C14 distribution pattern in the product indicated that the 4-carbon fragment was transferred intact to C-3, C-4, C-5, and C-6 of the mannose moiety and was also reduced intact to the erythritol portion.A method for the degradation of D-mannose for determination of the C14 distribution in the molecule is described.

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Material flow determination through agricultural machinery management

Scientia Agricola ◽

10.1590/s0103-90162010000400001 ◽

2010 ◽

Vol 67 (4) ◽

pp. 375-383 ◽

Cited By ~ 17

Author(s):

Thiago Libório Romanelli ◽

Marcos Milan

Keyword(s):

Fuel Consumption ◽

Agricultural Production ◽

Material Flow ◽

Production Systems ◽

Field Capacity ◽

Effective Field ◽

Silage Production ◽

Definition Of ◽

Agricultural Production Systems

The approach of material embodiment in agricultural production systems is important because it determines the convergence of inputs (indirectly, the natural resources) to the field. Additionally, material flow is the basis for both environmental (energy analysis, emergy synthesis, life-cycle analysis and carbon inventories) and economical analyses. Since different materials cannot compose a single index, generally these flows are not shown, making comparisons among approaches difficult. Another aspect that makes comparisons difficult is the definition of the boundary of the studied system. If these boundaries differ, results will also be different, hiding actual distinctions among systems. The present study aims to suggest an arrangement of existing models to determine material flow in agricultural production systems. The following steps were considered: i) the adoption of a diagram language to represent the analyzed system; ii) determination of the material flow for directly applied inputs; iii) determination of the material flow for indirectly applied inputs, which included: determination of the effective field capacity; fuel consumption; machinery depreciation; and labor. Data on fuel consumption were compared with the models presented. The best model applied was a fixed parameter based on engine power (0.163 L kW-1 h-1). The determination of the material flow for maize silage production presented similar results as those obtained in regional databases.

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