Soil salinization processes have increased over the years and affect large parts of agricultural fields. The purpose of this review was to highlight the most important aspects regarding the potential effects of soil salinity on plants. In the current context of climate change, extreme weather and increased drought periods can lead to plant metabolic dysfunctionalities and accumulation of salt ions because of the increasing need for irrigation. The most important limiting factor, salinity, has a highly negative impact on plant growth independent of the appearance of either natural or anthropic status. The negative aspects include decreased leaf development rate, a low water level in all parts of the plant, reduced cell division and elongation, and low-intensity photosynthetic rate. Other negative aspects are directly related to stomata closure, reduced transpiration, low CO2 level, and limitations on seed germination. However, there are also some positive aspects to the presence of salinity in soil. The field offers unlimited possibilities of research in order to activate pathways that help plants become resistant to salt stress. Several physiological parameters can benefit from low salt concentration (halopriming), such as germination, vigor, rapid seedling growth, and increased stomata number. Further studies should focus on both the positive and negative aspects of the increase in soil salinity.
Identifying regional variations and agronomical records can turn into a function of magnitude and timing for sustainable maize production. The crop characteristics are directly related with the temperature and precipitation from the growing season. Therefore, the main aim of this study was to highlight maize crop requirements from the most suggestive records from Romania. A literature search was performed based on keywords related to both maize crop and agrometeorological requirements. After the evaluation of the temperature requirements on maize phenology’s principal stages, some inconsistencies were identified. These are related to the leaf development stage and the development of the fruit stage, where the minimum temperature interval overlaps with the optimum. A wide variety of assessments were also made, taking into account mainly the monthly temperature and precipitation requirements. The number of principal growth stages assessed differed greatly from one source to another. The growth degree days has been incoherently expressed and calculated, and these details must be taken into account for developing further models. The results regarding phenology aim to propose the setting up of comparable records at a regional (PannEx area) and global scale. This review will help to develop new climate projections in Romania in the climate change context through the project Agroclim.
25 March 2022 in Notulae Botanicae Horti Agrobotanici Cluj-Napoca
Researches carrying evidence for various uses and bioactive principles of Agastache spp. are justifying the upscaling into cultivation of these medicinal species. But, hindrances in their cultivation exist due to the insufficient documentation of their biology under field conditions. Because productivity of these medicinal species (herba) is ensured by the combined contribution of plant agronomic traits, these are related to the feasibility of the crop and therefore, can be used as predictors for successful cultivation. The aim of this study was to evaluate comparatively four valuable Agastache species (A. mexicana, A. scrophulariifolia, A. foeniculum) and one cultivar (A. rugosa ‘After Eight’), in order to identify the favourability for cultivation in local conditions (Romania). Based on the structural indicators of plant morphology (plant height, shoot number, leaf number, leaf length and width, inflorescence length, verticillaster number and flower number), registered over the span of two years, were explored relationships and similarities as well as their implications in previsioning the phenotypic potential. The results showed that studied species acclimatized successfully and all agronomic parameters studied increased in values in the second year. The average plant height in second year (2020) was 109.8 cm and average inflorescences length 9.6 cm. Stable positive correlations between inflorescence length with plant height and shoot number were observed, while differences among species became pronounced as plants become established, evidenced by clearer distinction in the second year. Phenotypic potential in the absence of inputs enables the feasibility assessment for medicinal plants introduced for cultivation in new regions.
Recently, there has been a growing interest in supplementing plant nutrition with foliar fertilizers. Foliar application of nutrients is considered a promising environmentally friendly strategy for improving the yield and nutrient efficiency of crops. Little work with foliar appliances on perennial fruits bushes, blackcurrant (Ribes nigrum L.), respectively, has been reported. This study was conducted to evaluate the growth and yield response of three blackcurrant varieties to macro and micronutrients’ foliar fertilizer solutions. Principal component analysis and factors environmental fitting were performed for the global assessment of growth and increases in branches length responsible for yield production throughout the entire vegetation period and reported to the final development. The results endorsed the benefits of foliar fertilization. Each variety has a preference for a specific foliar treatment. The highest increases in branches length for Ruben variety was with Ascovigor foliar fertilizer; for Tiben with Kombimax; for Tines with Mikromix. The varieties growth dynamics due to fertilizers was best fitted to foliar Kombimax. Stable models were found to all blackcurrant varieties depending on developmental stage and foliar fertilization application. Application of foliar fertilizer is very profitable in terms of pairing each variety with optimum product, which will increase its specific yield potential.
Germination of the medicinal and aromatic plant basil raises interesting questions due to its no seed periodicity and dormancy demand, and the seed priming could help to assure the permanent needs for this herb. The study aimed to provide an adapted BBCH (Biologische Bundesanstalt Bundessortenamt and CHemical industry) scale for the germination secondary stages of sweet basil Ocimum basilicum L. (var. MVSt). A standardized germination test was performed with hydropriming, electric field, and magnetic field as priming methods to assess the changes in the secondary stages of germination. The time range for each basil secondary stage was recorded and added to the adapted BBCH, to highlight the daily secondary stage changes. All the seed priming methods increased the germination capacity with 2–3% compared with the control, with the highest value for electropriming. The seed priming methods studied improved the germination and changed the pattern of secondary stages in the BBCH scale. The germination energy was set to more than 90% in all primed seeds, with a maximum of 91.75% in the magnetic field. The time needed for 50% germination of seeds was set to 6.5 days and 90% germinated seeds were recorded after 11.7 days. The 09a BBCH lasted for 9 days in control and hydropriming, 10 days in electric field conditions and 7 days for magnetoprimed seeds.
Medicinal and aromatic plants hold a high share of interest in Romania. To offset the harvesting of spontaneous flora and ensure the sustainable conservation of natural resources, the cropping of highly valuable plants of interest represents a priority for the current agricultural system. This study was conducted due to the need for more balance in species exploitation. Therefore, it assessed the emergence dynamics, leaf appearance, growth and development of the plants depending on row spacing and plant distance. The research was conducted at the INCDCSZ Brașov, within the Technology Department, Laboratory of Medicinal and Aromatic Plants. The density of planting is the most important factor. Plants sown in continuous rows showed the highest yields of fresh and dry herbs, especially when the distance between the rows was set to 25 cm. Row-by-row distances of 50 cm ensure average values for all growth and development parameters. An increase in the row-by-row distance up to 70 cm drastically reduced the dry biomass up to 7.89 t ha−1 in continuous rows, followed by a 2 and 2.5 t ha−1 decrease for 15 cm and 25 cm plant-by-plant distances, respectively. Continuous row planting and a 25 cm row-by-row distance negligibly reduce the climate impact on growth and development. Greater spaces between plants leads to an average increase in individual development, but with a decrease in the total potential yield.