scholarly journals PENERAPAN REMEDIASI PADA SISTEM BUDIDAYA UDANG DI TAMBAK TANAH SULFAT MASAM (Studi Kasus di Kabupaten Berau, Kalimantan Timur)

2019 ◽  
Vol 14 (1) ◽  
pp. 55
Author(s):  
Tri Heru Prihadi ◽  
Brata Pantjara
Keyword(s):  
Soil Remediation ◽  
Shrimp Farming ◽  
Fish Pond ◽  
Soil Reclamation ◽  
Acid Sulfate Soil ◽  
Acid Sulfate ◽  
East Kalimantan ◽  
Tiger Shrimp ◽  
Baseline Information ◽  
Research Institute

Remediasi tanah sulfat masam untuk tambak dapat meningkatkan produktivitas tanah yang lebih baik untuk budidaya udang sistem monokultur dan polikultur. Penelitian dilakukan bertujuan untuk mengetahui pengaruh remediasi tanah pada budidaya udang windu di tambak tanah sulfat masam. Penelitian dilakukan pada tambak milik masyarakat di Pulau Tempurung, Desa Kasai Kecamatan Pulau Derawan Kabupaten Berau Provinsi Kalimantan Timur. Karakterisasi tanah untuk mengetahui rona awal tambak tanah sulfat masam dilakukan sebelum budidaya. Prosedur perbaikan tambak tanah sulfat masam diadopsi dari hasil penelitian Balai Riset Perikanan Budidaya Air Payau dan Penyuluhan Perikanan (BRPBAPPP). Remediasi tanah dilakukan dengan tahapan pengolahan tanah, pengeringan dasar tambak, perendaman, dan pembilasan; dan dilanjutkan dengan pengapuran dan pemupukan. Pengapuran tambak menggunakan dolomit dengan dosis 1,0 ton per ha. Hasil penelitian menunjukkan bahwa tambak yang diremediasi menghasilkan udang windu sebanyak 357,15 kg/ha dan tanpa remediasi sebesar 100 kg/ha. Tambak yang diremediasi pada sistem polikultur menghasilkan udang windu 100,9 kg/ha dan ikan bandeng 330 kg/ha. Penerapan teknologi remediasi dasar tanah pada budidaya udang windu sistem monokultur berdasarkan analisis ekonomi sederhana memberi keuntungan sebesar Rp26.828.500,00 /ha/siklus dan BC rasio 4,68. Polikultur udang windu dan bandeng menghasilkan keuntungan sebesar Rp8.800.000,00 /ha/siklus dan BC rasio 2,47.Remediation of acid sulfate soil pond can increase the productivity of the soil used for shrimp farming with monoculture and polyculture systems. This study was conducted to determine the post effects of soil remediation on tiger shrimp cultured in acid sulfate soil pond. The study was conducted in one of the farms owned by a fish farmer in Tempurung Island, Kasai Village, Derawan District, Berau Regency, East Kalimantan Province. The characteristics of the soil were determined to serve as the baseline information before cultivation. The pond remediation followed the procedures set by the Research Institute for Brackishwater Aquaculture and Fisheries Extension, Maros. The soil reclamation was carried out following the subsequent stages: soil plowing, pond bottom drying, inundation, and flushing; followed by liming and fertilization. Ponds liming used a dolomite dose of 1 ton/ha. The results showed that the remediated acid sulfate soil ponds could produce tiger shrimp up to 357.15 kg/ha while non-remediated ponds only produced up to of 100 kg/ha. The remediated brackish fish pond used for polyculture system could produce tiger shrimp up to 100.9 kg/ha and milkfish up to 330 kg/ha. The application of soil remediation on ponds of tiger shrimp monoculture systems yielded a profit of Rp 26,828,500.00/Ha/cycle and BC ratio of 4.68. For polyculture of tiger shrimp and milkfish, the profit was Rp 8,800,000.00/Ha/cycle and BC ratio of 2.47. 

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.

Ammonium nitrogen uptake by rice grown in acid sulfate soil under controlled redox conditions

1996 ◽  
Vol 46 (2) ◽  
pp. 103-109 ◽  
Author(s):  
A. Jugsujinda ◽  
J. Prasittikhet ◽  
R. D. DeLaune ◽  
C. W. Lindau ◽  
R. P. Gambrell
Keyword(s):  
Nitrogen Uptake ◽  
Ammonium Nitrogen ◽  
Redox Conditions ◽  
Acid Sulfate Soil ◽  
Acid Sulfate

Ca-Al-Containing Slag As an Advanced Fenton System for the Remediation of Acid Sulfate Soil

2021 ◽  
Author(s):  
Jiachen Zeng ◽  
Bo Feng ◽  
De Wei ◽  
Runli Tao ◽  
Baolin Shi ◽  
...  
Keyword(s):  
Acid Sulfate Soil ◽  
Acid Sulfate ◽  
Fenton System

Iron and sulfur cycling in acid sulfate soil wetlands under dynamic redox conditions: A review

Chemosphere ◽  
2018 ◽  
Vol 197 ◽  
pp. 803-816 ◽  
Author(s):  
Niloofar Karimian ◽  
Scott G. Johnston ◽  
Edward D. Burton
Keyword(s):  
Redox Conditions ◽  
Sulfur Cycling ◽  
Acid Sulfate Soil ◽  
Acid Sulfate

Drying and oxidation effects on the magnetic properties of sulfidic material during oxidation

Soil Research ◽  
1995 ◽  
Vol 33 (1) ◽  
pp. 19 ◽  
Author(s):  
RH Crockford ◽  
IR Willett
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Laboratory Experiments ◽  
Chemical Oxidation ◽  
Biological Oxidation ◽  
Acid Sulfate Soil ◽  
Air Drying ◽  
Acid Sulfate ◽  
Initial Values ◽  
Iron Mineralogy

Laboratory experiments aimed at understanding the changes in magnetic properties of a sulfidic clay during its oxidation are described. Samples of a sulfidic clay from an acid sulfate soil were slowly oxidized and their magnetic susceptibility (χ) and remanence properties (ARM and SIRM) were measured over a 28 week period. Magnetic properties were measured for the undried material and for subsamples which had been dried by rapid air-drying or by extraction of water with dioxane. Magnetic susceptibility decreased during the first 12 weeks of oxidation and then increased. Samples dried in dioxane showed similar values to the undried material, but air drying caused decreases in χ in samples taken up to 7 weeks of oxidation. Thereafter, there was no effect of drying on χ. In contrast to susceptibility, the remanence properties decreased throughout the experiment, to 8% of their initial values. The results were interpreted in terms of rapid chemical oxidation of a labile magnetic compound (possibly greigite) during the early stages of oxidation and by air drying, and the biological oxidation of pyrite during later stages of oxidation. Associated with these reactions was the formation of a paramagnetic compound, probably ferrihydrite. The effects of changes in iron mineralogy during 28 weeks of oxidation on χ are shown schematically.

scholarly journals Technical Efficiency and Output Losses in Shrimp Farming: A Case in Mekong Delta, Vietnam

Fishes ◽  
2021 ◽  
Vol 6 (4) ◽  
pp. 59
Author(s):  
Keo Sa Rate Thach ◽  
Hong Tu Vo ◽  
Ji-Yong Lee
Keyword(s):  
Technical Efficiency ◽  
Stochastic Frontier ◽  
Mekong Delta ◽  
Shrimp Farming ◽  
Primary Data ◽  
Traditional Group ◽  
Black Tiger Shrimp ◽  
Tiger Shrimp ◽  
Average Loss ◽  
Study Sites

The conversion from black tiger shrimp farming and crop farming to white leg shrimp production is widespread in Vietnam’s Mekong Delta provinces. However, this conversion trend also contains many risks related to the technical aspects of the production process. The study mainly aims to estimate the technical efficiency of white leg shrimp farming. It also compares the technical efficiency of white leg shrimp farming between the traditional group that historically has cultivated white leg shrimp and the group that recently converted from black tiger shrimp and crops to white leg shrimp, in order to evaluate the efficiency and adaptability of shrimp farming. Primary data were collected by directly interviewing 99 farmers in traditional areas and 101 farmers in recently converted areas in the study sites and analyzed by using the stochastic frontier method. The calculated technical efficiency was around 72.9 percent, suggesting that farmers could increase their output level by about 27.1%, given constant inputs. There was no difference in the technical efficiency of the two groups, indicating that the converted farms have sufficient adaptability when switching to white leg shrimp farming. The output loss in farmers’ production is still very high, with an average loss of 1973 kg/hectare.

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