The influence of the nutrition space on the herb and seed yields at Moldavian dragonhead (Dracocephalum moldavica L.), in A.R.D.S. Secuieni pedoclimatic conditions

Abstract

The Dracocephalum moldavica (L.) species, known under the popular name of moldavian dragonhead, is used in the pharmaceutical, cosmetic and food industry due to its high content in active principles. To ensure the necessary of raw material at A.R.D.S. Secuieni are conducted researches regarding the development of the cultivation technology for its introduction into culture and extension in agriculture. In the conditions of 2015 – 2016 agricultural year, due to the observations made, it was found that the fresh herba, dry herba and seed yields were positively influenced by the distance between the rows (average factor A), but also by the distance between plants per row (average factor B). The obtained data have showed that the highest average yields of fresh herba (34063,33 kg/ha), dry herba (9313,33 kg/ha) and seeds (1069 kg/ha) were obtained at the a1xb1 interaction sown at 25 cm between rows and in continuous row (control variant). In the experience with the nutrition space, it was found that, the plants harvested for herba had a vegetation period of 109 days requiring 1877,9 oC and 325,2 mm of rainfall, and the plants harvested for seed developed in 137 days, the sum of accumulated temperatures being of 2492,1 o C and of rainfall of 355 mm.