Aurelia Diaconu, Milica Dima, Marieta Ploae, Mihaela Croitoru, Reta Drăghici and I. Drăghici
- Potato production is very high performing culture, but also very demanding environmental conditions (climatic) and technological (fertilization, protection). Potato yields are influenced by a complex of biological factors, environmental and technological. The strongest factor limiting production is drought period from May to September, when training and intense accumulation of tubers that occurs with great frequency in all areas of the country's culture. Potato varieties tested in 2008-2010 to the Research-Development Station for the Culture of the Plants on the Sandys Soils Dăbuleni, Dolj County, Romania, regarding the dynamics of accumulation in tubers showed that the variety is an important factor in culture technology. Choosing the right variety of potato crop leads to success. To highlight the ability of potato cultivars to accumulate as early substances in tuber harvesting were done at 45 days of vegetation at 55 days after physiological maturity vegetation and potato plants. Production of tubers in the trade conditions of the area by plain ranged greatly depending on the variety grown and harvest time. Determinations on quantitative accumulation and nutritional quality of potato tubers were performed according to the variety and amount of fertilizer applied to sandy soils in climatic conditions in southern of Oltenia.
Gabriela Mihaela Ciupureanu, Elena Ciuciuc, Aurelia Diaconu, Alina Ciuca and Daniela Popa
Starting from the fact that the principles of agro-ecology become fundamental principles for the development of a green economy, especially in the context of current climate change, the effective capitalization of the ecological conditions of an agricultural area is one of the main objectives of agricultural science and practice. Identifying and formulating adaptive technological solutions can guide any producer to capitalize different climate and soil conditions. The sandy soils in Southern Oltenia offer less favourable ecological conditions, and the cultivation of watermelons is now profitable enough for such conditions. Growers are, however, interested in getting the most productive yields, early and profitable, even under the conditions of climate change. The current paper quantifies the grafting of watermelons in the conditions of the sandy soils of Dăbuleni, with poor soil supply, with meteorological drought phenomena and agricultural drought risk, in terms of quality and quantity of production under the climatic conditions in 2015-2017. The results, correlated with the climatic conditions, recommend the cultivation of grafted watermelons, offering the producers in the area a niche of ecological adaptation, ensuring the resistance of plants to abiotic, thermo-hydric stress factors, and improving the resistance to low temperatures, heat and drought.
Reta Drăghici, Aurelia Diaconu, Alina Paraschiv, Iulian Drăghici, Gheorghe Coteț, Mihaela Croitoru and Milica Dima
Sweet potato Ipomoea batatas (L) Lam is a drought resistant species with vigorous growth and high productivity adapted to the conditions of sandy soils (Iamandei Maria et al., 2014, Diaconu Aurelia et al., 2016). In terms of Romania, sweet potato are reproduces by shoots obtained under solar. In this respect, the research carried out at CCDCPN Dabuleni between 2016-2017 aimed at obtaining sweet potato shoots in a trifactorial experience, as follows: Factor A - Planting time in the solar (15 March, 25 March), Factor B - Variety (KSP 1 and KSC 1), Factor C - Diameter of tubers (2, 3, 4 cm). The results obtained on the monitoring of solar microclimate influence on growth and development of sweet potato shoots and plant physiological processes (photosynthesis, perspiration, chlorophyll content) underline the importance of the planting period and the quality of the biological material planted in the solar. Observations and determinations of growth rate they have a slow pace in April, when climatic factors have fluctuated greatly from night to day, which increased in the first decade of May, when the shoots saw the optimal planting size of 35-40 cm. The best results were obtained by planting in the solar on March 25, using tuberous roots 3-4 cm in diameter, when there was an intense physiological activity and a large number of shoots on the tuber (9.125-9.980 shoots).