Cotton is a thermophile plant, whose geographical area does not exceed the 45° parallel to the north. However, at this latitude, it does not always mature. The sum of temperature degrees needed by this plant to mature is 3200-2800°C. The minimal temperature for germination is 12°C, while the sunlight duration must be at least 1 500 hours. Even though water consumption is high, cotton can withstand drought (a frequent phenomenon in Dobrogea) better than other plants such as certain cereals, for example. The fertilized cultures can withstand drought better than the unfertilized ones. Cotton vegetates normally at a rain regime of 400-500 mm yearly, if at least 200 mm and at most 300 mm fall between May-August (the rain excess during summer is harmful because the heat and light are reduced during rain, causing thus a delay in ripening and consequently a diminished production). In regards to the soil, cotton needs fertile soil with good drainage that allows air, heat and water to enter the layers explored by the roots. Currently, there are no cotton cultures in Romania, but the Dobrogea plateau offers proper soil and climate conditions in certain regions.

cotton; marine aquatorium; favorable climate; fertile soils; drought resistance

Presentation: oral