Technological elements in the cultivation of parsnips (Pastinaca sativa L.)

Abstract

During the period 2018-2020 in Maritsa vegetable crops research institute, Plovdiv was conducted an experiment with parsnip variety, Dlouhy Bily, with two cultivation schemes (70 + 45 + 45/15 cm and 70 + 30 + 30 + 30/15 cm) and two sowing dates (05.03 and 12.06). The plants are grown on a high flat bed. The aim of the study is to establish the optimal sowing period and cultivation scheme in the conditions of the Thracian lowland. It was found that in the early field production the parsnip forms a larger total biomass in the three-row cultivation scheme, which is explained by the more favorable climatic conditions. The ratio of the mass of the leaves and the root crop varies depending on the time of production, as in the case of late production the product part is larger in comparison with the leaf mass. The difference in the percentage of the formed root crops in the late production is significantly higher, the increase is by 35.8% compared to the four-row scheme in the early direction. In the three-row cultivation scheme, no significant differences were registered between the two times of production. The average weight of late-grown roots exceeds that of early production by 15.3%. It was found that the yield of parsnips is higher in a four-row cultivation scheme, and the differences in yields between early and late production are small and insignificant.