Abstract
Parsnip is a very valuable vegetable due to its nutritional value and dietetic quality. It is moreover herbal raw material abundant in active substances. The yield quality of vegetables greatly depends on thorough pre-sowing soil tillage. The present study aimed at evaluating the influence of different presowing soil tillage (medium-deep ploughing, cultivating) and plant growing methods, flat or ridge cultivation, on the yield of parsnip and some biometric traits of its roots. The field experiment was carried out in 1999, 2000 and 2002 on lessive soil with the granulometric composition corresponding to medium silty loam. The parsnip cultivar 'Półdługi Biały' was the experimental plant species. The cultivation of parsnip on ridges had a significant influence on increased total yield of roots and decreased yield of small roots, as compared to flat cultivation. A significant increase in unit weight of the root and its diameter in the top part was also recorded in the latter type of cultivation. Spring pre-sowing tillage had no significant effect on parsnip yields. An increasing trend was observed only for total and marketable root yield in the ploughed plots. When parsnip is grown on lessive soil (which has an unstable structure), plants cultivated on ridges after spring pre-sowing plough are the most beneficial treatment combination.
Highlights
Parsnip is a vegetable with a high nutritional value and dietetic quality
The aim of the present study was to evaluate the influence of spring pre-sowing ploughing and shallow tillage as well as of plant cultivation methods, with parsnip grown on ridges or on flat ground, on its root yield and selected biometric traits of roots
54 50 52 6.8 ns Parsnip cultivation on ridges had a significant influence on the increase in total root yields and the decrease in the yield of small roots as compared to flat cultivation
Summary
Parsnip is a vegetable with a high nutritional value and dietetic quality. The storage roots of parsnip contain considerable amounts of sugars, proteins and vitamin C, B1, B2 and B6. The value of parsnip is enhanced due to the content of fibre, minerals, including potassium, phosphorus, calcium, iron, as well as pectins (Orłowski and Kołota , 1999; Wolski et al 1999; Kuskowska , 2000; Kołota et al 2007). Water deficiency during its growing period strongly reduces plant growth and lowers yields, and it has a negative influence on the quality of harvested roots. Parsnip grows well on heavy and loamy soils, while higher yields can be achieved from habitats with good culture, humic ones, and non-crusting soils
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