scholarly journals Humic balance of a rice plot located on the South Iazafo Plain, Vavatenina district, Analanjirofo region - Madagascar: Study of possible humic recovery through the contribution of leaf compost from the distillation activity of essential oils from the leav

2021 ◽  
Vol 6 (1) ◽  
pp. 108-115
Author(s):  
Christian Pierre Ratsimbazafy ◽  
Ignace Rakotoarivonizaka ◽  
Rijalalaina Rakotosaona
Keyword(s):  
Organic Matter ◽  
Essential Oil ◽  
Soil Structure ◽  
Organic Amendment ◽  
The South ◽  
Initial State ◽  
Leaf Compost ◽  
Agricultural Yield ◽  
Paddy Yield

Knowing the initial state of the soil, especially the amount of organic matter contained in the soil, is the basis of effective fertilization. A soil with too little organic matter will be difficult to cultivate, mainly because of problems of soil structure loss. Humus plays a central role in the quality of soils and the maintenance of their key functions. If the level of organic matter decreases further, soil fertility may be called into question. Therefore, this study consists of evaluating the stock of humus in a private paddy field located in the South Iazafo plain and considering the possible recovery in the event of a proven deficiency. The soil examination carried out on this private plot indeed shows the lack of organic matter (barely 2%). Consequently, a humus recovery in order to reach an optimal threshold of 3% ideal for rice cultivation will therefore be deemed necessary. This need for humus is amply compensated by the organic supply in the form of leaf molds from the residues of the essential oil distillation activity of clove leaves, around 20 to 40 years old. Note that this type of organic amendment is very abundant in the neighboring areas of the said Iazafo plain. Their agronomic enhancement is essential in order to promote agricultural yield, in particular paddy yield in this rice-growing area which is unfortunately constantly shrinking

scholarly journals Comparative Preservative Potential of Essential Oils of Ocimum gratissimum from Bambili of the North West and Mbonge of the South West Regions of Cameroon on Scomber scombrus

2021 ◽  
pp. 20-29
Author(s):  
Ngwasiri Pride Ndasi ◽  
Tsi Celestine Angu ◽  
Wilson Agwanande Ambindei ◽  
Nantia Akono Edouard ◽  
Diane Youmbi Yimta ◽  
...  
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Thiobarbituric Acid ◽  
Salmonella Typhi ◽  
The South ◽  
North West ◽  
The North ◽  
West Region ◽  
South West

Essential oils serve as a natural alternative to chemical or synthetic antimicrobials and antioxidants to fight against food borne pathogens or spoilage organisms, inhibiting lipid peroxidation and extending the shelf life of fish and other seafood. This study examines the antibacterial properties of essential oils from leaves of Ocimum gratissimum L. from two localities of the North West and South West of Cameroon on some pathogenic spoilage gram negative and positive bacteria isolated from mackerel, and their antimicrobial and antioxidant effectiveness on the fish quality during preservation for one month at -18oC. The plant materials were harvested from Bambili, the North West Region of Cameroon and from Mbonge, the South West Region of Cameroon and the essential oils extracted by hydro-distillation using Clevenger-type apparatus. Escherichia coli, Salmonella typhi and Staphylococcus aereus were isolated from mackerel by culture techniques and their susceptibility to the essential oils determined by well diffusion method. Psychrophilic bacteria and Enterobacteraceae counts were used to evaluate the microbiological quality of the fish during storage. Total volatile basic nitrogen and thiobarbituric acid reactive substance assays were used as indices to assess the biochemical quality of the fish during storage. Antibacterial susceptibility test showed that essential oils of O. gratissimum from the North West and South West Regions were active on all the tested microorganisms with different degree.The inhibitory diameters for essential oil from the South West Region were 28.0 mm, 27.2 mm and 26.0 mm while that for essential oil from the Bambili were 24.1 mm, 20.4mm and 21.9 mm for Staphylococcus aereus, Escherichia coli and Salmonella typhi respectively. At the end of storage periods, the values of Psychrotrophs plate counts, total volatile base nitrogen and thiobarbituric acid reactive substances for fish samples treated with essential oil from the Mbonge were 2.71log10cfu/g, 12.88 mgN/100g and 0.88 mgMDA/Kg, while that treated with North West essential oil were 3.00 log10cfu/g, 16.24 mgN/100g and 1.26 mgMDA/Kg respectively. From the obtained results, essential oil of O. gratissimum from the Mbonge was the most effective in preserving Atlantic mackerel.

scholarly journals Soil Structure and Soil Organic Matter of Selected Soil Types in Different Ecosystems

2013 ◽  
Vol 59 (1) ◽  
pp. 1-8
Author(s):  
Erika Tobiašová ◽  
Vladimír Šimanský ◽  
Bożena Dębska ◽  
Magdalena Banach-Szott
Keyword(s):  
Particle Size ◽  
Organic Matter ◽  
Soil Organic Matter ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Soil Structure ◽  
Soil Types ◽  
Productive Capacity ◽  
Important Indicator

In this study, differences in soil structure in different ecosystems (forest, meadow, urban, and agro-ecosystem) and soil types (Haplic Chernozem, Haplic Luvisol, Haplic Stagnosol) with a dependence on the influence of quantity and quality of soil organic matter and the particle size distribution on fraction composition of soil aggregates were compared. Soils had different productive capacity and particle size distribution. The most favourable soil structure was in the agro-ecosystem, then in forest, meadow, and urban ecosystem. The worst soil structure was in Haplic Stagnosol. An important indicator in assessing of ecosystem influence, water-resistant macro-aggregates of the 0.5-1 mm size fraction seems to be. This fraction was the only one which was statistically significantly influenced by the ecosystem, and also the only one which was not statistically significantly influenced by the soil type. This fraction also was not influenced either with the quantity and quality of soil organic matter, or with the particle size distribution. The quantity of soil organic matter is reflected in relation to the fractional composition of dry-sieved aggregates and its quality in relation to waterresistant aggregates. Large fractions of water-resistant macro-aggregates were in positive correlation with C : N ratio, the amount of extracted humus substances, or stability and quality of humic acids; while smaller fractions were in negative correlation just with these parameters. Clay and silt fractions had a positive influence on waterresistant macro-aggregates formation, while sand fraction had negative and vice versa.

Productivity of corn hybrids of different fao groups depending on microfertilizers and growth stimulants under irrigation in the south of Ukraine

2016 ◽  
Vol 3 (1) ◽  
pp. 55-60
Author(s):  
Yu. Lavrynenko ◽  
R. Vozhegova ◽  
O. Hozh
Keyword(s):  
Grain Quality ◽  
Laboratory Method ◽  
The South ◽  
Corn Hybrids ◽  
Early Maturity ◽  
Effi Ciency ◽  
Grain Moisture ◽  
Grain Productivity ◽  
The Impact

The purpose of the research is to identify effi cient microfertilizers and growth stimulants considering biologi- cal features of new corn hybrids of different FAO groups under irrigation conditions in the South of Ukraine and trace their impact on grain productivity of the plants. The methods of the research are the fi eld method – to study the interaction of the research object with experimental factors of the natural environment, to register the yield and evaluate the biometrical indices; the laboratory method – to measure soil moisture, grain moisture content and grain quality indices; the statistical method – to evaluate the reliability of the obtained results; the calculation methods – for economic and energetic assessment of the growing techniques used. The results of the research. The paper defi nes the impact of microfertilizers and growth stimulants on the yield and grain quality of the corn hybrids of different maturity groups and on the economic effi ciency of growing them. The conclusions of the research. Under irrigation conditions of the Southern Steppe of Ukraine it is recommended that the following hybrids should be grown in dark-chestnut soils: early maturity DN Pyvykha, medium-early Skadovskyi, medium maturity Kakhovskyi and medium-late Arabat, using the growth stimulants – treating the seeds with Sezam-Nano and fertilizing with Grainactive at the stage of 7–8 leaves.

Composition and properties of horseradish (Armoracia rusticana), as one of the representatives of the essential oil culture in Siberia

2020 ◽  
Author(s):  
G.A. Demidenko G.A. ◽  
Keyword(s):  
Chemical Composition ◽  
Essential Oil ◽  
The South ◽  
Armoracia Rusticana

The article presents an analysis of the chemical composition and properties of horseradish (Armoracia rusticana), as one of the representatives of the essential oil culture in the Siberian conditions in the South of the Krasnoyarsk territory.

Contribution to the Optimization of a Gas Chromatographic Method by QbD Approach used for Analysis of Essential Oils from Salvia officinalis

2019 ◽  
Vol 70 (6) ◽  
pp. 2015-2020
Author(s):  
Silvia Robu ◽  
Aurelia Romila ◽  
Olimpia Dumitriu Buzia ◽  
Adrian Florin Spac ◽  
Camelia Diaconu ◽  
...  
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Plant Material ◽  
Mobile Phase ◽  
Chromatographic Method ◽  
Salvia Officinalis ◽  
Salvia Officinalis L ◽  
Gas Chromatographic Method

Numerous articles on Salvia officinalis L. have been published regarding the composition of their essential oil. The considerable variation found may be due to the quality of the plant material as well as to the methods used for analysis. A simple GC-MS method was developed and optimized in the QbD approach, for the determination of sage essential oils. The optimization of GC-MS analysis was performed using different mobile phase flows, injection volumes, split ratios and temperature programs. The optimized method proved to be simple and can be successfully applied for the determination of sage essential oils.

Quantitative and Qualitative Characteristics of Urban Discharge to Small River Basins in the South West of Sweden

1983 ◽  
Vol 14 (3) ◽  
pp. 155-166 ◽  
Author(s):  
Wm. Hogland ◽  
R. Berndtsson
Keyword(s):  
River Basins ◽  
Small River ◽  
The South ◽  
Time Intervals ◽  
Qualitative And Quantitative ◽  
South West ◽  
Quantitative Characteristics ◽  
Qualitative Characteristics ◽  
Qualitative And Quantitative Characteristics

The paper deals with the qualitative and quantitative characteristics of urban discharge. Ratios for urban discharge and recipient flow during different time intervals are presented and discussed. The quality of the urban discharge is illustrated through pollutographs.

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