THE INFLUENE OF THE SEEDING PERIOD ON THE YIELD AND ON THE OIL CONTENT AND PRODUCTION OF PERILLA OCYMOIDES L. PUBLISHEDV. NEŞCU, Gh. DAVID
Abstract. The experiments have been organized in the Topolovăţ area, part of the physical and geographic unit of Banat – Crişana plain. Studying the map of the climate types on the Romanian territory, we found out that the location of the research is within the mild temperate-continental climate located at the interference of the climate province sector having oceanic influences with the climate province sector having Mediterranean influences. The experiments performed within this territory have been located on a preluvosol vertic soil type with in-depth stagnogleization. The soil reaction is mild acid between 0-25 cm (pH-5,40). The humus content is at moderate level: between 0-36 cm (2,79%). The experiments have been bi-factorial. The factors taken into consideration within this experiment have been: - A factor – seeding period; - B factor – originThe researches regarding the influence of the seeding period over the crop on 5 having Perilla ocymoides origins, have revealed that in comparison with the average crop of 980 kg/ha obtained from the culture seeded during the period 10th -15th of April, seeding during the period 20th -25th of April, the nucules crop has increased to 1242 kg/ha, i.e. 28%. The highest average crop of 1360 kg/ha has been obtained when the seeding has been performed during the period 30th of April – 5th of May when the soil temperature has been above 10-12°C. The crop increase has been of 39%, therefore obtaining a significant variation of 380 kg/ha. From the studied origins we have noticed Italy with a yield of 1479 kg/ha when the seeding has been performed during the period 30th of April – 5th of May, followed by those having origins in Turkey (1384 kg/ha) and in Italy 1 (1371 kg/ha) seeded during the same period.The average oil content measured for the 5 researched biotypes has fluctuated depending on the seeding period: 47,0% and 48,8% .The oil production has been of 600 kg/ha in case of the culture seeded during the period 30th of April – 5th of May, with 33% higher than the oil production registered for the culture seeded during the period 30th of April – 5th of May.
Key words: Perilla ocymoides, crop, content, and oil production.