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Growing melon under temperate climate conditions is quite risky due to the high climatic requirements of this species. Vegetable growers use plastic film mulches to heat soil, to reduce weed infestation, and to maintain optimal soil moisture content. The aim of our study was to determine the suitability of white and black plastic film for soil mulching in melon cultivation under temperate climate...
Preservation of spice plants usually leads to changes in the structure and content of biologically active substances. The present study determined the effect of lyophilization and convection drying on the content and chemical composition of the essential oil from leaves of two leaf celery cultivars. Compared to lyophilization, convection drying allows a larger amount of essential oil to be retained...
Globe artichoke (Cynara cardunculus L. var. scolymus (L.) Fiori) is an edible herbaceous perennial plant that plays an important economic role in Mediterranean agriculture. In recent years, extensive research, which aimed to characterize the phenolic profile of the most important globe artichoke cultivars in Italy, has been conducted. However, very little information is available on the phenolic composition...
The chemical composition and activity of herbal raw material depend, among others, on ontogenetic variability. The present study investigated the effect of harvest date of winter savory (Satureja montana L.) herb and plant age on fresh and dry herb yield as well as on the content of L-ascorbic acid, carotenoids, chlorophylls, essential oil, flavonoids and tannins. S. montana herb from a one- and two-year-old...
The cultivation system with cover crops as living mulches is growing in importance in the worldwide agriculture as it combines an economical effect with pro-ecological and soil protecting activities. The plant species tested in the research were not frost resistant: buckwheat, millet, white mustard and berseem clover. A control were the plots without cover crops. The intercrops were sown in the first...
Similarly to other species of the genus Satureja (Lamiaceae), winter savory is valued in traditional medicine in many countries of the world. Most studies on winter savory are primarily focused on the chemical composition and biological activity of its raw material, but few studies concern proper growing conditions. The aim of the present study, conducted on one-year-old plants, was to determine relationships...
Winter savory (Satureja montana L.) is an aromatic subshrub of significant medicinal and seasoning qualities. Winter savory herb yield and quality depend on various factors, including environmental and agronomic ones. The aim of the present study was to evaluate the effect of winter savory plantation establishment method (seedlings, herbaceous cuttings) on the morphological traits and raw material...
Artichoke is valued as a vegetable and medicinal plant. The aim of the study was to determine the effect of irrigation and leaf harvest date of artichoke grown in southeastern Poland on total yield and marketable fresh leaf yield, its structure and the content of biologically active substances: total phenolic acids, flavonoids and tannins. Irrigation contributed to an increase in fresh leaf yield,...
The present study deals with biochemical and physiological methods for assessment of the optimal nutrient supply for the growth and development of garden rocket (Eruca sativa Mill.), edible vegetable. Two nitrate (0.3; 0.6 g N dm⁻³ of medium) and three potassium doses (0.3; 0.6; 0.9 g K dm⁻³ of medium) in the form of sulphate or chloride were examined. At the higher nitrate dose and the sulphate form...
Due to the presence of glandular trichomes in their epidermis and production of essential oils, plants from the family Lamiaceae, including Melissa officinalis L., are commonly cultivated in most European countries and across Poland. With its diverse composition of essential oils and the wide range of pharmacological effects, the raw material of the lemon balm is widely applied in various branches...
Capsaicinoids are secondary metabolites characteristic of plants of the genus Capsicum and are only found in the pepper fruit. Their biosynthesis occurs mainly in the placental cells as well as in the interlocular septa of the fruit. In the present study, the content of capsaicinoids (capsaicin and dihydrocapsaicin) was determined by HPLC in two hot pepper cultivars (‘Orkan’ and ‘Bronowicka Ostra’),...
Biochemical assessment was performed of leaves, flower buds and flowers of lavender. High positive correlation was demonstrated between the essential oil contents and antioxidant activity (AA) (R = 0.9688), total phenolic acids and AA (R = 0.9303), as well as high negative correlation between flavonoid contents and AA (R = -0.9760). Results of the foregoing studies also suggest that AA of lavender...
Qualitative and quantitative composition of the essential oil is subject to different types of variability. The aim of this study was to determine the effect of irrigation and harvest date on the content and composition of essential oil distilled from leaves, petioles and leaf blades of Apium graveolens L. var. secalinum Alef. Drip irrigation was carried out twice in the third 10 days of July and...
Vegetables have a significant place in the healthy eating pyramid. It is recommended that vegetables should be consumed as often as possible to provide nutritional and biologically active substances. The aim of the present study was to determine the biological value of the leaves of rocket as affected by different regimes of plant nitrogen and potassium nutrition. Plants were grown in a peat-based...
The quality of fresh herbs used mainly as food products, is dependent on a number of factors, including the agronomic and environmental ones. The pharmacopoeial material of summer savory is the whole or ground herb, which besides essential oil, contains many other biologically active compounds, such as tannins, carotenoids, flavonoids, and minerals. The aim of the study was to evaluate the yielding...
Vegetables are important dietary components and constitute a group of the lowest calorie raw produce with a high nutritional value. The aim of the present study was to determine the nutritional and energy potential of the leaves of rocket (Eruca sativa Mill.) as affected by different regimes of plant nitrogen and potassium nutrition. Plants were grown in a greenhouse in a peat substrate, using varying...
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