scholarly journals FAKTOR-FAKTOR DOMINAN YANG MEMPENGARUHI PRODUKTIVITAS TAMBAK DI KABUPATEN PINRANG, SULAWESI SELATAN

2016 ◽  
Vol 2 (1) ◽  
pp. 117
Author(s):  
Akhmad Mustafa ◽  
Erna Ratnawati
Keyword(s):  
Water Quality ◽  
Quality Factor ◽  
Water Depth ◽  
Condition Factor ◽  
Pond Management ◽  
Independent Variables ◽  
Dummy Variable ◽  
South Sulawesi ◽  
Shrimp Production ◽  
Brackishwater Pond

Kabupaten Pinrang memiliki tambak terluas di Provinsi Sulawesi Selatan dan ditetapkan sebagai pusat pengembangan produksi udang windu, namun produktivitas tambaknya masih relatif rendah. Oleh karena itu, dilakukan penelitian yang bertujuan untuk mengetahui faktor-faktor dominan yang berpengaruh terhadap produktivitas tambak di Kabupaten Pinrang. Sebagai peubah tergantung adalah produktivitas tambak, sedangkan sebagai peubah bebas adalah faktor-faktor status pembudi daya tambak, kondisi tambak, pengelolaan tambak, kualitas air tambak, dan kualitas tanah tambak yang masing-masing terdiri atas 9, 11, 31, 11, dan 17 peubah. Regresi berganda dengan peubah boneka digunakan untuk menganalisis data untuk memprediksi peubah tergantung. Hasil penelitian menunjukkan bahwa produktivitas tambak di Kabupaten Pinrang rata-rata 499 kg/ha/musim. Produktivitas tambak di Kabupaten Pinrang masih dapat ditingkatkan melalui penambahan tenaga kerja dan pemisahan saluran pemasukan dan pengeluaran air serta penambahan tinggi pematang agar tinggi air juga dapat ditingkatkan. Aplikasi pupuk urea pada saat persiapan tambak dan aplikasi urea dan SP-36 sebagai pupuk susulan dapat meningkatkan produktivitas tambak, sebaliknya aplikasi KCl pada saat persiapan tambak dapat menurunkan produktivitas tambak. Pengurangan kapur susulan dan peningkatan pupuk yang mengandung fosfat dapat meningkatkan produktivitas tambak.Pinrang Regency has largest brackishwater ponds in South Sulawesi Province and determined as a centre for developing of shrimp production. However, their brackishwater ponds productivity is still low. Because of that, it was conducted research with aims to know the dominant factors that effect on the productivity of brackishwater pond in Pinrang Regency. As a dependent variable in this research was productivity of brackishwater ponds. Independent variables were grouped into: (a) farmer status factor, consist of 9 variables; (b) pond condition factor, consist of 11 variables; (c) pond management factor, consist of 31 variables; (d) water quality factor, consist of 11 variables and (e) soil quality factor, consist of 17 variables. Multiple regressions with dummy variable were used to analyze the data in predicting dependent variable. The results showed that the productivity of brackishwater pond in Pinrang Regency was 499 kg/ha/cycle in average. The productivity of brackishwater pond could be increased through addition of labor and separating of outlet and inlet canals and making higher the pond dyke for increasing the water depth. Application of urea fertilizer as an initial fertilizing and application urea and SP-36 as a continuing fertilizing could be increased the brackishwater pond productivity. In contrary, application of KCl fertilizer as an initial fertilizing would be decreased the brackishwater ponds productivity. Decreasing of continuing liming and increasing the fertilizer containing phosphate would be increased the brackishwater ponds productivity in Pinrang Regency.

scholarly journals DOMINANT FACTORS AFFECTING SEAWEED (Gracilaria verrucosa) PRODUCTION IN ACID SULFATE SOILS-AFFECTED PONDS OF LUWU REGENCY, INDONESIA

2010 ◽  
Vol 5 (2) ◽  
pp. 147 ◽  
Author(s):  
Akhmad Mustafa ◽  
Jesmond Sammut
Keyword(s):  
Quality Factor ◽  
Stocking Density ◽  
Gracilaria Verrucosa ◽  
Pond Management ◽  
Acid Sulfate ◽  
Factors Affecting ◽  
Dummy Variable ◽  
South Sulawesi ◽  
Seaweed Production ◽  
Sulfate Soils

Most of brackish water ponds used for seaweed (Gracilaria verrucosa) culture in Luwu Regency, South Sulawesi, Indonesia are constructed on acid sulfate soil. Despite this inevitable condition, opportunities remain open to increase the seaweed production. The research was conducted to study the dominant factors that affect the seaweed production in ASS-affected ponds of Luwu Regency. As a dependent variable in this research is seaweed production. Independent variables were grouped into: (a) farmer status factor, consisting of 9 variables; (b) pond condition factor, consisting of 8 variables; (c) pond management factor, consisting of 29 variables; (d) soil quality factor, consisting of 17 variables and (e) water quality factor, consisting of 11 variables. Multiple regression with dummy variable was used to analyze the data in prediction dependent variable. Results show that the average of seaweed production in ASS-affected pond of Luwu Regency is 11,000 kg dry/ha/year. Seaweed production can be increased through: (a) decreasing dosage of urea and KCl and increasing dosage and frequency of fertilizer containing phosphate; (b) increasing water depth in the pond and decreasing percentage of water exchange,(c) conducting remediation to increase the soil pH and decreasing the concentration of Fe in the water, (d) increasing stocking density of milkfish to decrease the epiphyte population and (e) increasing the frequency of the farmer to attend trainings.

PEUBAH KUALITAS AIR YANG MEMPENGARUHI PERTUMBUHAN RUMPUT LAUT (Gracilaria verrucosa) DI TAMBAK TANAH SULFAT MASAM KECAMATAN ANGKONA KABUPATEN LUWU TIMUR PROVINSI SULAWESI SELATAN

2009 ◽  
Vol 4 (1) ◽  
pp. 125
Author(s):  
Akhmad Mustafa ◽  
Rachmansyah Rachmansyah ◽  
Dody Dharmawan Trijuno ◽  
Ruslaini Ruslaini
Keyword(s):  
Water Quality ◽  
Growth Rate ◽  
Ammonium Phosphate ◽  
Gracilaria Verrucosa ◽  
Acid Sulfate Soils ◽  
Acid Sulfate Soil ◽  
Acid Sulfate ◽  
Independent Variables ◽  
Water Quality Variables ◽  
Sulfate Soils

Rumput laut (Gracilaria verrucosa) telah dibudidayakan di tambak tanah sulfat masam dengan kualitas dan kuantitas produksi yang relatif tinggi. Oleh karena itu, dilakukan penelitian yang bertujuan untuk mengetahui peubah kualitas air yang mempengaruhi laju pertumbuhan rumput laut di tambak tanah sulfat masam Kecamatan Angkona Kabupaten Luwu Timur Provinsi Sulawesi Selatan. Pemeliharaan rumput laut dilakukan di 30 petak tambak  terpilih selama 6 minggu. Bibit rumput laut dengan bobot 100 g basah ditebar dalam hapa berukuran 1,0 m x 1,0 m x 1,2 m. Peubah tidak bebas yang diamati adalah laju pertumbuhan relatif, sedangkan peubah bebas adalah peubah kualitas air yang meliputi: intensitas cahaya, salinitas, suhu, pH, karbondioksida, nitrat, amonium, fosfat, dan besi. Analisis regresi berganda digunakan untuk menentukan peubah bebas yang dapat digunakan untuk memprediksi peubah tidak bebas. Hasil penelitian menunjukkan bahwa laju pertumbuhan relatif rumput laut di tambak tanah sulfat masam berkisar antara 1,52% dan 3,63%/hari dengan rata-rata 2,88% ± 0,56%/hari. Di antara 9 peubah kualitas air yang diamati ternyata hanya 5 peubah kualitas air yaitu: nitrat, salinitas, amonium, besi, dan fosfat yang mempengaruhi pertumbuhan rumput laut secara nyata. Untuk meningkatkan pertumbuhan rumput laut di tambak tanah sulfat masam Kecamatan Angkona Kabupaten Luwu Timur dapat dilakukan dengan pemberian pupuk yang mengandung nitrogen untuk meningkatkan kandungan amonium dan nitrat serta pemberian pupuk yang mengandung fosfor untuk meningkatkan kandungan fosfat sampai pada nilai tertentu, melakukan remediasi untuk menurunkan kandungan besi serta memelihara rumput laut pada salinitas air yang lebih tinggi, tetapi tidak melebihi 30 ppt.Seaweed (Gracilaria verrucosa) has been cultivated in acid sulfate soil-affected ponds with relatively high quality and quantity of seaweed production. A research has been conducted to study water quality variables that influence the growth of seaweed in acid sulfate soil-affected ponds of Angkona Sub-district East Luwu Regency South Sulawesi Province. Cultivation of seaweed was done for six weeks in 30 selected brackishwater ponds. Seeds of seaweed with weight of 100 g were stocked in hapa sized 1.0 m x 1.0 m x 1.2 m. Dependent variable that was observed was specific growth rate, whereas independent variables were water quality variables including light intensity, salinity, temperature, pH, carbondioxide, nitrate, ammonium, phosphate, and iron. Analyses of multiple regressions were used to determine the independent variables which could be used to predict the dependent variable. Research result indicated that relative growth rate of seaweed in acid sulfate soils-affected brackishwater ponds ranged from 1.52% to 3.63%/day with 2.88% ± 0.56%/day in average. Among nine observed water quality variables, only five variables namely: nitrate, salinity, ammonium, phosphate and iron influence significantly on the growth of seaweed in acid sulfate soils-affected brackishwater ponds. The growth of seaweed in acid sulfate soils-affected brackishwater ponds of Angkona District East Luwu Regency, can be improved by using nitrogen-based fertilizers to increase ammonium and nitrate contents and also fertilizers which contain phosphorus to improve phosphate content to a certain level. Pond remediation to decrease iron content and also rearing seaweed at higher salinity (but less than 30 ppt) can also be alternatives to increase the growth of seaweed.

Research on the Pollution Diffusion Regularity near Sewage Outlet Areas in Yuncheng Reach of the Fen River

2011 ◽  
Vol 383-390 ◽  
pp. 2430-2436
Author(s):  
Jian Hua Hou ◽  
Min Quan Feng ◽  
Xiao Peng Xing ◽  
Zhen Hua Hou
Keyword(s):  
Water Quality ◽  
Flow Field ◽  
Water Depth ◽  
Concentration Gradient ◽  
River Flow ◽  
Measured Data ◽  
Quality Model

The purpose of this paper is to find the pollution diffusion regularity near sewage outlet area of Yuncheng reach of the Fen River. A 2-D water hydrodynamic and quality model was used to simulate flow field, the water quality and contamination dispersion. The parameters of the model were calibrated with measured data of the water depth, flow and water quality in Yuncheng reach of the Fen River. According to the simulated result, the total area of pollution belt with 19 sewage outlets is 8.89km2 in normal year. And 3.89% of the reach has a worse water quality than V class in standard. The percentage of V and Ⅳ Class of water is 69.17% and 26.94%.In dry year, the total area of pollution belt with 19 sewage outlets is 8.89km2.The percentage of inferior V, V and Ⅳ Class of water is 27.80%, 69.46% and 2.74%. It was shown by the simulated results that the concentration gradient decreases with increasing distance to the outlets and the dilution and dispersion of pollutants was enhanced by a greater river flow.

scholarly journals Length-weight relationships and condition factor of Hyperopisus bebe (Lacepede, 1803) (Actinopterygii: Osteoglossiformes) in River Galma, Zaria, Kaduna State, Nigeria

2017 ◽  
Vol 4 (8) ◽  
pp. 301-305
Author(s):  
Matouke M. Moise
Keyword(s):  
Water Quality ◽  
Water Body ◽  
Growth Pattern ◽  
Condition Factor ◽  
Allometric Growth ◽  
Male And Female ◽  
B Values ◽  
The Poor ◽  
Poor Water Quality ◽  
The Mean

The investigation of length-weight relationship and condition factor are very relevant indices to ascertain the health of fish in the water body. Length-weigh relationship and condition factor of Hyperopisus bebe (Lacepede, 1803) (Actinopterygii: Osteoglossiformes: Mormyridae) in River Galma, Zaria, Kaduna State, Nigeria, were assessed. The mean length and mean weigh in male and female were 26.703 cm +/- 0.51 cm and 25.32 cm +/- 0.898 cm; 158.2 g +/- 10.1 g and 95.91 g +/- 9.26 g, respectively. The exponent or growth pattern 'b' values for male and female were 2.009 and 2.176. The condition factor for male and female were 0.59 and 0.83, respectively. The negative allometric growth pattern and poor condition factor might be due to the poor water quality in the fish ecosystem and should be regarded with concern.

scholarly journals PENGARUH PENGETAHUAN TENTANG LINGKUNGAN HIDUP, KEARIFAN LOKAL, LOCUS OF CONTROL, DAN MOTIVASI BERTANI TERHADAP PERILAKU LINGKUNGAN YANG BERTANGGUNG JAWAB PETANI DI KABUPATEN SOPPENG

2017 ◽  
Vol 16 (02) ◽  
pp. 72-84
Author(s):  
Mulyadi Mulyadi
Keyword(s):  
Locus Of Control ◽  
Environmental Behavior ◽  
Social Study ◽  
Independent Variables ◽  
Responsible Behavior ◽  
South Sulawesi ◽  
Control Motivation ◽  
Responsible Environmental Behavior ◽  
Paddy Farmers ◽  
Variance Homogeneity

Responsible environmental behavior is assumed to be significantly affected bay one’s knowledge of the environment, the local wisdom, locus of control motivation farming. The study reported here aimed to examine how the four independent variables actually affected the level of farmers’ responsible behavior towards environment. The causal and multidimensional social study was conducted in the Soppeng Regency of South Sulawesi from July 2009 to October 2009, trough a survey to the paddy farmers in the Liliriaja District. A sample of 120 farmers was made up 30 randomly selected farmers from each of the four purposefully selected sub districts in Liliriaja: Appanang, Galung, Rompegading and Jampu. The data of each variable were collected separately with a questionnaire. A path technique, which was preceded by normality and variance homogeneity tests, was employed to analyze the data descriptively and inferentially. The results proved that the farmers’ farming motivation and their responsible environmental behavior, respectively, was directly affected by their knowledge of the environment, the local wisdom, and the locus of control. The three independent variables also indirectly affected the farmers’ responsible environmental behavior through their motivation in farming. These findings suggest that the variables of environmental knowledge, local wisdom, locus of control and the farmers’ motivation in farming are important determinants of their responsible environmental behavior. Variation in the farmers’ responsible environmental behavior may therefore be minimized by improved knowledge of the environment, local wisdom, locus of control and farming motivation.

scholarly journals FAKTOR PENGELOLAAN YANG MEMPENGARUHI TINGKAT PRODUKSI RUMPUT LAUT Kappaphycus alvarezii DI PERAIRAN PANTAI SELATAN PROVINSI SULAWESI SELATAN

2016 ◽  
Vol 5 (3) ◽  
pp. 491
Author(s):  
Erna Ratnawati ◽  
Akhmad Mustafa ◽  
Rohama Daud
Keyword(s):  
Coastal Waters ◽  
Management Practices ◽  
Kappaphycus Alvarezii ◽  
The South ◽  
Dummy Variable ◽  
South Sulawesi ◽  
Yield Production ◽  
Long Line ◽  
Seed Origin ◽  
Seaweed Production

Perairan pantai Kabupaten Jeneponto, Bantaeng, dan Bulukumba merupakan sentra produksi rumput laut Kappaphycus alvarezii di Sulawesi Selatan. Pengelolaan budidaya yang dilakukan oleh pembudidaya di daerah tersebut cukup bervariasi sehingga dilakukan penelitian yang bertujuan untuk mengetahui faktor pengelolaan budidaya yang mempengaruhi produksi rumput laut. Metode survai melalui pengajuan kuesioner kepada 62 responden secara terstruktur. Sebagai peubah tidak bebas dalam penelitian ini adalah produksi rumput laut, sedangkan peubah bebas adalah faktor pengelolaan budidaya. Analisis regresi berganda dengan peubah boneka digunakan untuk memprediksi produksi rumput laut. Hasil penelitian menunjukkan bahwa produksi rumput laut di perairan selatan Sulawesi Selatan berkisar antara 463-5.000 dengan rata-rata 1.502,3 kg kering/3.000 m2 yang dibudidayakan dengan tali panjang. Faktor pengelolaan budidaya yang mempengaruhi produksi rumput laut adalah jarak antar tali ris, jarak antar rumpun dalam tali ris, hama baronang, penyakit ice-ice, bobot bibit, asal bibit dan sumber cemaran. Untuk meningkatkan produksi rumput laut di perairan selatan Sulawesi Selatan dapat dilakukan melalui peningkatan bobot bibit antara 36,9 sampai 100,0 g/rumpun, menggunakan bibit yang tidak diangkut terlalu lama, tidak menambah jarak antar tali ris sampai melebihi 1,0 m, tidak menambah jarak antar rumpun dalam tali ris yang melebihi 25 cm serta melakukan penanaman berdasar kalender musim tanam untuk mencegah terjadinya serangan hama dan penyakit serta cemaran.Coastal waters of Jeneponto, Bantaeng, and Bulukumba Regencies are the centre of seaweed Kappaphycus alvarezii production in South Sulawesi. Culture management practices applied by farmers in these areas are highly variable. Therefore, this research was conducted to study culture management practices affect the seaweed production in the area. Field survey was conducted by interviewing 62 respondents using questionnaires. The dependent variable in this research was seaweed production, while the independent variables were culture management factors. Multiple regressions with dummy variable were employed to analyze the data to predict seaweed production. The results show that the seaweed productions per one cycle in the south coastal waters of South Sulawesi were ranging from 463 to 5,000 kg dry/3,000 m2. Using long line method, the average yield production was 1,502.3 kg dry/3,000 m2. Culture management practices that affect the seaweed production were distance between ropes, distance between seaweed seeds along the rope, rabbitfish predatory, ice-ice disease, weight of seed, seed origin, and source of pollution. Increasing seaweed production in the south coastal waters of South Sulawesi could be done through increasing weight of seed from 36.9 to 100.0 g/clump, quicker transport of seed, maintaining the distance between the ropes not more than 1.0 m, not increasing the distance between clump along the ropes more than 25 cm along as well as conducting seed planting based on cultivating season to prevent pest diseases and pollution.

Polyculture of Indian White Shrimp (Penaeus indicus) with Milkfish (Chanos chanos) and its Effect on Growth Performances, Water Quality and Microbial Load in Brackishwater Pond

2019 ◽  
Vol 86 (sp1) ◽  
pp. 43
Author(s):  
Christina Lalramchhani ◽  
Changaramkumarath Paran Balasubramanian ◽  
Akshay Panigrahi ◽  
Tapas Kumar Ghoshal ◽  
Sanjoy Das ◽  
...  
Keyword(s):  
Water Quality ◽  
Microbial Load ◽  
White Shrimp ◽  
Chanos Chanos ◽  
Growth Performances ◽  
Penaeus Indicus ◽  
Brackishwater Pond ◽  
Effect On Growth

Porous Elastic Filter Material in Water Depth in the Processing of the Application

2012 ◽  
Vol 482-484 ◽  
pp. 1068-1072
Author(s):  
Qiang Liu ◽  
Li Li Zhao
Keyword(s):  
Water Quality ◽  
Water Depth ◽  
Compression Ratio ◽  
Quartz Sand ◽  
Membrane Separation ◽  
Removal Rate ◽  
Filter Material ◽  
Average Concentration ◽  
Feed Water ◽  
Separation System

Investigation porous elastic filter material deep treatment of drinking water contamination removal in effect. The membrane separation system to meet the requirements of the feed water quality, in this paper the new type of porous elastic filter material compression filter technology and traditional quartz sand filter technology water depth contrast the treatment effect experimental study. The results showed that different compression ratio of porous elastic filter material to filter pollutants has good removal efficiency, and better than quartz sand. Porous elastic filter material compression ratio and turbidity, the average iron removal rate was significantly positive correlation. The compression ratio for 70% of the porous elastic filter material after filter, and the effluent turbidity of, iron, CODMn and DOC average concentration of were 0.35 NTU, 0.05, mg • L-1,1.73 mg • L-1 and the 1.48 mg • L-1; Basic meet the membrane separation system of the feed water quality requirements.

Best subset modelling of phosphorus in the Grand River using correlated variables

1996 ◽  
Vol 23 (4) ◽  
pp. 893-903 ◽  
Author(s):  
A. Tyagi ◽  
M. Sharma ◽  
E. McBean
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Stepwise Regression ◽  
Suspended Solids ◽  
Statistical Modelling ◽  
Quality Parameters ◽  
Independent Variables ◽  
Modelling Procedure ◽  
Different Seasons ◽  
Grand River

Statistical models are developed for the estimation of phosphorus concentrations for different seasons and locations using routinely monitored water quality parameters in the Grand River Basin. Two methods of modelling, namely the best subset model and the stepwise regression method based on R2 and F values, are described. The best subset modelling procedure enables comparison between full model (containing all the independent variables) and subset models (containing subsets of independent variables). For correlated independent variables, the best subset modelling procedure is shown to provide a better model than the stepwise regression procedure. The statistical modelling results indicate that suspended solids play an important role in the prediction of phosphorus levels and consequently decreasing suspended solids would decrease the growth of aquatic plants in the Grand River Basin. Key words: regression modelling, water quality, phosphorus, suspended solids, rivers, statistics.

Sign in / Sign up

Export Citation Format

Share Document