Environmental Conditions Of Cultivation Research Articles

산양삼의 재배지 환경조건에 따른 진세노사이드 함유량 분석과 제언 : 평창지역을 중심으로

산양삼의 재배지 환경조건에 따른 진세노사이드 함유량 분석과 제언 : 평창지역을 중심으로

The Effect of Different Nitrogen Fertilizer Rates, Sowing Density, and Plant Growth Regulator Application on the Quality and Milling Value of Triticum durum Desf. Grain

Agronomic treatments and environmental conditions of cultivation affect the nutritional value and technological quality of durum-wheat-based products. The aim of this study was to determine the effect of 18 agronomic treatments that differed in nitrogen rate, sowing density, and growth regulator application on variability in the quality and milling parameters of durum wheat grain, and the interrelationships between these parameters. The study demonstrated that the investigated parameters were modified by the agronomic treatments. However, environmental variance resulting from differences in soil characteristics and climatic conditions dominated in most cases (44–93%). The percentage of variance induced by differences between treatments in total variance was distinctly higher only in the case of the gluten index (59%). The treatments without nitrogen fertilization and with or without the application of the growth regulator, and the treatments with the application of the growth regulator and the nitrogen rate of 120 kg N ha−1, discriminated between the milling parameters associated with sifting (bran, type 1 semolina) and grading of milling products (flour, type 2 semolina, and type 3 semolina), respectively.

The oxygen content and dissolved oxygen consumption level of white shrimp Litopenaeus vannamei in the nanobubble cultivation system

Vaname shrimp is one of the most popular commodities, causing high demand. Success in aquaculture activities is related to the systemic and environmental conditions of cultivation. This study aims to determine the oxygen content and dissolved oxygen consumption level of vaname shrimp in nanobubble cultivation systems. This research was experimental using a completely randomized design factorial pattern. Consisting of two factors, factor A was the shrimp cultivated with nanobubbles and an aerator and factor B factor was the cultivation times of 0 days, 10 days, 20 days and 30 days. The parameters observed were oxygen content, oxygen consumption level and water quality including pH, ammonia, salinity, and temperature. Data analysis was conducted using Analysis Of Variance and continued with Duncan's Multiple Range test. The dissolved oxygen content in nanobubble treatment was 3.9 ppm to 10.8 ppm while the dissolved oxygen aerator treatment was 2.81 ppm to 4.65 ppm. The oxygen consumption rate was from 1.10 up to 6.84 mg/O2/g/hour. The highest value in the aerator treatment was on the 30th day of the third and the lowest hour observation for the nanobubble treatment was on the 10th day of the 1st-hour observation. The results showed that the cultivation system with nanobubbles affected the oxygen content and oxygen consumption level of the vaname shrimp.

Chlorococcum humicola (Nageli) Rabenhorst as a Renewable Source of Bioproducts and Biofuel

Among the diverse new generation biomass yielding species, green algae are the most promising organisms. Compared to biomass production of other organisms, production of algae is less laborious, quite fast, and more economical. Moreover, eutrophicated waters get naturally purified in the cultivation process of algae. Algal biomass from monoculture of specific species, which are rich in carbohydrates, proteins and lipids, is considered a good source of diverse bio-products and feed-stock for food, feeds and bio-fuels. Quantity and quality of algal biomass for specific products depend on the species and strains as well as environmental conditions of cultivation. In this connection, biomass productivity and oil-yield of a local strain of <em>Chlorococcum humicola </em>(Nageli) Rabenhorst was assessed in Bold’s Basal Medium. Long-term storage capacity of the alga was tried by entrapping the algal cells in sodium alginate beads, which showed viability up to 14 months. Estimation of total carbohydrate, protein, lipid and chemical characterization of oil as well as the feasibility of its conversion to biodiesel revealed the industrial potential of this local strain as a source of food and biofuel. Fatty acid profiling of the extracted oil showed that 70% are mono-saturated and 12.2 % are nutritionally important polyunsaturated fatty acids. The oil could be effectively trans-esterified to methyl esters and the conversion was confirmed by FTIR spectroscopy. Further standardization of the mass production of the alga in natural environmental conditions for biomass and oil is progressing to optimize its value as globally competent food, nutraceutical and biofuel resource.

Environmental Soil Quality Research as Prediction for Sustainable Orchards Cultivation in Southern Serbia

<p>Soil quality is one of the main environmental conditions for successful and sustainable orchards cultivation. The main role of the soil is reflected in its production activities or productivity. Soil fertility implies content available nutrients, such as individual elements, pH and humus. The research of soil quality leads to certain conclusions about which soil is suitable for growing crops. The investigation of soil quality for Pcinja District in southern Serbia is performed, with the goal to complete environmental conditions for cultivation of the most suitable crops. The methods that were used for the analysis of the soil in the laboratory are: chemical and Al-methods and calibration and potentiometric, spectrophotometric, photometric. For potentiometric method pH meter, spectrophotometer classic which is determined by phosphorus and Flame Photometar device that determines potassium are used. The results in this paper show high quality land for sustainable growing fruit crops.</p>