scholarly journals Using benthic diatom assemblages to assess sedimentary nutrient status in Tri An reservoir, Dong Nai province, Vietnam

2021 ◽  
Vol 5 (2) ◽  
pp. first
Author(s):  
Yến Thị Hoàng Trần ◽  
Thái Thành Trần ◽  
Quảng Xuân Ngô ◽  
Hà Mạnh Bùi ◽  
Lưu Thanh Phạm
Keyword(s):  
Sediment Quality ◽  
Nutrient Status ◽  
Biological Indicators ◽  
Underground Water ◽  
Benthic Diatom ◽  
Diatom Assemblages ◽  
Nutrient Contents ◽  
High Nutrient ◽  
Nutritional Compounds

Tri An Reservoir plays an important role in the water supply for Dong Nai province and Ho Chi Minh city. It also contributes significantly to increase underground water reserves in the vicinity, especially in the dry season. However, recently, the increase of nutritional compounds in the lake has contributed to eutrophication, causing serious deterioration of the quality of the environment, creating conditions for microalgae to thrive. Therefore, this study aimed to evaluate and zoning the sediment quality of the Tri An reservoir based on using benthic diatom communities as biological indicators as an indicator tool. Sediment and algae samples were collected from 8 survey locations in the Ho Tri An area from March to August in 2019. The results showed that the dominance of several species belonging to the genera that prefer to live in nutrient-rich environment such as Navicula, Nitzschia. The TDI index indicated the sediment environment had high nutrient contents. Water quality in the lower section of the reservoir was classified from eutrophic (even hyper-eutrophic) status, particularly stations into the reservoir. Meanwhile, upstream and downstream sites had lower nutrient levels, mainly excessive phosphorus but still in eutrophic class. Additionally, the initial analysis results also revealed that NH4 +, TN, PO4 3􀀀 and DO played a major role to regulate the development of benthic diatom assemblages.

The Effects of Development of a Tidal Barrage Upon the Water and Sediment Quality of the Mersey Estuary (U.K.) and its Biota

1988 ◽  
Vol 20 (6-7) ◽  
pp. 229-233 ◽  
Author(s):  
D. C. Hockin ◽  
D. M. Parker
Keyword(s):  
Sediment Quality ◽  
Nutrient Status ◽  
Pollution Load ◽  
Environmental Significance ◽  
Tidal Power ◽  
Water And Sediment Quality ◽  
Faecal Bacteria ◽  
Recreational Use ◽  
Mersey Estuary

The prime constraint upon the development of a tidal power generating barrage is the use of the Mersey estuary as a waste disposal facility. Historical disposal of persistent wastes continues to cause environmnetal problems, even though modern practices have resulted in a reduced pollution load. Mercury and lead have the greatest environmental significance, although with reference to barrage operation the nutrient status and increased transmission of light through less turbid water will be of equal or greater importance. A constraint upon the recreational use of the impounded water body will be the unacceptable numbers of faecal bacteria. A criterion for the design of the barrage should be the maximisation of the volume of water entering on each tidal cycle to disperse nutrients and pollutants and import as much oxygen as possible. This will minimise the increase of retention time and reduce the probability of methylation of mercury within the sediment. Additionally it will have implications for the feeding behaviour of the internationally important wildfowl populations.

Sewers and the Quality of Canals and Ditches in Amsterdam

1993 ◽  
Vol 27 (5-6) ◽  
pp. 61-67 ◽  
Author(s):  
E. Jacobs ◽  
J. W. van Sluis
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Sediment Quality ◽  
Water System ◽  
Water Systems ◽  
Sewer System ◽  
Water And Sediment ◽  
Combined Sewer ◽  
Water And Sediment Quality

The surface water system of Amsterdam is very complicated. Of two characteristic types of water systems the influences on water and sediment quality are investigated. The importance of the sewer output to the total loads is different for both water systems. In a polder the load from the sewers is much more important than in the canal basin. Measures to reduce the emission from the sewers are much more effective in a polder. The effect of these measures on sediment quality is more than the effect on water quality. Some differences between a combined sewer system and a separate sewer system can be found in sediment quality.

Study of feed quality and biological indicators of varietal feeding of newly created different ploidy mulberry varieties

2021 ◽  
Vol 68 (07) ◽  
pp. 7-11
Author(s):  
Mahir Həmzə oğlu Hacıyev ◽  
◽  
Vəfa İbrahim qızı Məhərrəmova ◽  
Keyword(s):  
Biological Indicators ◽  
Average Weight ◽  
Biological Parameters ◽  
Average Mass ◽  
Feed Quality ◽  
Leaf Yield ◽  
New Varieties

The article clarifies the effect of the leaves of various newly created ploidy mulberry varieties on the productivity of mulberry silkworms, as well as on the biological parameters of silkworms. New varieties are described by conducting varietal feeding to determine the feed quality of varieties by providing information on leaf yield and the leaf yield of newly created varieties, by studying the biological parameters of varietal feeding, by determining the average mass of alive cocoons, silkness%, cocoon yield. Keywords: mulberry, sort, leaf yield, silkiness, viability, average weight of cocoon, cocoon product

scholarly journals Processing Impact on Nutritional, Antinutritional, and Phytochemical of Fenugreek Seeds (Trigonella Foenum-Graecum L.)

2021 ◽  
Vol 5 (01) ◽  
pp. 36-44
Author(s):  
Babita Adhikari ◽  
Shonu Rai
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Properties ◽  
Bioactive Components ◽  
Fenugreek Seeds ◽  
Nutritional Compounds ◽  
Trigonella Foenum Graecum L ◽  
The Impact ◽  
Reduction Percentage ◽  
Iron And Calcium

Phytate and tannin are more pronounced antinutrients limiting the nutritional quality of fenugreek. The impact of roasting (130±5°C for 7 minutes), soaking (12 hrs. at room temperature) and germination (72 hrs. at 25°C) on bioactive compounds (polyphenol and antioxidant activity), nutritional and anti-nutritional compounds (phytate and tannin) in Fenugreek were studied. Experimental data were analyzed using the software GenStat 12th Edition. Protein increased significantly (p<0.05) during roasting, soaking, and germination whereas fat decreased significantly. Iron and calcium increased during roasting whereas decreased during soaking and germination. Maximum reduction of phytate (54.55%) and tannin (66.73%) were found when fenugreek seeds were germinated (72 hours). The reduction percentage of antinutrients by soaking (12 hours) and roasting (130±5⁰C for 7 mins) was found to be a lesser effective method compared to germination. All the treatments had a significant (p<0.05) impact on their bioactive components. Phenolic content increased significantly (p<0.05) during roasting, soaking, and germination. Antioxidant activity (IC50=1.28mg dm/ml) was found to be high in the germinated samples as compared to raw, roasted, and soaked samples. Hence, Germination of fenugreek seeds for 72 hours is concluded as the most effective and promising method for the reduction of antinutrients and increasing the nutritional components, phytochemicals, and antioxidant properties.

scholarly journals Phosphorus (P) improves industrial tomato quality and yield in soil with high phosphorus content

2020 ◽  
pp. 1335-1341
Author(s):  
Arthur Bernardes Cecílio Filho ◽  
Bruno Trevizaneli ◽  
Sergio Manuel Rugeles Reyes
Keyword(s):  
Soluble Solids ◽  
Tomato Crop ◽  
Nutrient Contents ◽  
Soil P ◽  
Yield And Quality ◽  
P Content ◽  
Tomato Processing ◽  
Commercial Yield ◽  
Solids Content

Soils under intensive and successive cropping with central pivot irrigation tend to present high nutrient contents, especially phosphorus (P), which is a nutrient with a great impact on the yield and quality of agricultural products. Among the rotating crops, the application of high P rates is common in processing tomato, although not supported by research. This work evaluates the effect of phosphate fertilization (0, 200, 400, 600, 800, and 1000 kg ha-1 P2O5) on the yield and quality of industrial tomato ‘Heinz 9553’ grown in a soil with high available P content (145 mg dm-3) resulting of an intensive vegetables cultivation, which have high demand by P. The highest total (127.4 t ha-1) and commercial (108.6 t ha-1) yields were obtained with 413.9 and 384 kg ha-1 P2O5, respectively. The results showed that pH of tomato juice, the percentages of green, red, and commercial fruits were not influenced by the applied P rates. However, nutrient delivery increased the soluble solids content up to 356 kg ha-1 P2O5, which is interesting for tomato processing. After harvesting the fruits, the available soil P content was increased with P supply to the plants. For improvement of commercial yield and soluble solids characteristics, the tomato crop shall be fertilised with P even though the soil has high P content.

scholarly journals Application of Vermicompost Fertilizer in Aquaculture Nutrition: Review

2021 ◽  
Author(s):  
Sonnia Nzilani Musyoka ◽  
Rita Nairuti
Keyword(s):  
Primary Productivity ◽  
Sediment Quality ◽  
Fish Farming ◽  
Gut Health ◽  
Alternative Source ◽  
Fish Feeds ◽  
Fish Gut ◽  
Nutrition Review ◽  
Intensive Aquaculture

Semi-intensive aquaculture using ponds is among the most common practices of fish production, whose output depends highly on the ponds’ natural primary productivity. With the increased sustainability and health concerns with artificial fish feeds and chemical fertilizers, organic manure has been credited as a cheap, safe and sustainable alternative source of aquaculture nutrition. Apart from supplying nutrients to the phytoplankton, organic manures supply food directly to zooplankton and fish, provide substrate for microbes and improve water and pond sediment quality. Vermicompost fertilizer (excrete of earthworms) has been recognized as a potential pond fertilizer because it has superior nutritional quality (of up to five times), contains microbes, and is in ready-for-uptake form. Besides, the vermicompost contains humic acid, which has antibiotic properties, and promotes fish gut health, stress management, and immune systems. Nonetheless, the application of vermicompost fertilizer in aquaculture is still not a common practice. Therefore, this study reviews the concept of vermiculture vis-à-vis pond fertilization and the various utilizations of the vermicompost in fish farming. This is to enable fish farmers to make an informed decision on identifying and selecting proper biofertilizer, which can increase yields and cut costs of production, thus maximizing profits and improving resource utilization.

scholarly journals Evaluasi Penggunaan Silica+® sebagai Feed Additive terhadap Metabolisme Mineral, Status Kesehatan dan Kualitas Ekskreta Broiler

2017 ◽  
Vol 41 (3) ◽  
pp. 285
Author(s):  
Gusma Gama Maradon ◽  
Sumiati Sumiati ◽  
Rita Mutia ◽  
Wiwin Winarsih
Keyword(s):  
Health Status ◽  
Mineral Metabolism ◽  
Feed Additive ◽  
Blood Profile ◽  
E Coli ◽  
Tibia Bone ◽  
Randomized Design ◽  
Zn Content ◽  
High Nutrient

This study aimed to evaluate dietary inclusion of silica+® on mineral metabolism, health status and excreta quality of broilers. This study used a completely randomized design (CRD) with 6 treatments and 6 replications (40 birds of each). The treatments were high nutrient diet (T1), T1 + silica+® 200 ppm (T2), low nutrient diet (T3), T3 + silica+® 200 ppm (T4), feed contain local feedstuff (rice bran) (T5), T5 + silica+® 200 ppm (T6). Parameters measured were minerals consumption, minerals retention, mineral content of the tibia, blood profile (erythrocytes, hemoglobin, hematocrit, leukocytes, differentiation of leukocytes and ratio H/L) and excreta quality (pH, water content and ammonia). The results showed that using silika+® 200 ppm increased (P <0.05) mineral consumption and excretion in low nutrient diet (T4), lowered (P <0.05) retention of Ca and Zn in high nutrient diet (T2), lowered (P<0.05) retention of Zn in low nutrient diet (T2), increased (P<0.05) Ca content in tibia bone in high nutrient diet (T2), increased Ca and Zn content in the tibia (P <0.05) in feed contain ricebran (T6), decreased the amount of fecal NH3 (P <0.05) in feed contain ricebran (T6), lowered E. coli in high nutriet diet (T2) and feed contain ricebran (T6). The conclusion of this study that silica+® could be used as feed additive to increase Ca and Zn deposition in tibia bone, lowering fecal NH3, lowering E. coli in ileum withouth any effect to the health status of broilers.

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