INFLUENCE OF CULTIVARS AND OF CLIMATIC CONDITIONS ON YIELD AND QUALITY OF CARROT

In the course of 3 years (1969, 1970, 1971) 10 carrot cultivars (‘Duwicker’, ‘Amsterdam’, ‘Flakkeer 151’, ‘Chantenay’, ‘Marktgärtner’, Amager 23′, ‘QD-104’, ‘Nantes’, ‘D-95’ and ‘Braunschweig’) were investigated in 2 sowing periods (May and June) on the experimental field of the Institute of Horticulture, in order to learn more about the reaction of the various cultivars on the climatic conditions of North West Croatia, on a definite soil, moreover to establish the extent of influence of the external factors in preservation of characteristics of cultivars.

The samples for chemical analysis were collected at 2 turns to determine the most suitable harvest period in regard to quality, i.e. the total and -carotene and dry matter content.

The 3 year examinations indicate the following:

1. The highest yields were achieved with cultivars ‘Duwicker’ (254.8 mtc/ha) and ‘Flakkeer 151’ (243.0 mtc/ha); and the lowest with ‘Chantenay’ (174.1 mtc/ha) and ‘Braunschweig’ (172.3 mtc/ha).

2. The greatest total carotene contents were found with cultivars: ‘D-95’: 40.8 mg/100 g, ‘Amager 23’: 40.0 mg/100 g, and ‘Amsterdam’: 38.9 mg/100 g; and the lowest with ‘Flakkeer 151’: 25.5 mg/100 g, ‘Duwicker’: 26.9 mg/100 g, and ‘Braunschweig’: 27.4 mg/100 g.
   When calculated against the area unit the highest yield of the total carotene was obtained from the cultivars ‘Amsterdam’, ‘D-95’, ‘Marktgärtner’, ‘Amager 23 and the lowest from ‘Chantenay’,

3. The highest contents of -carotene had the cultivars: ‘D-95’: 20.6 mg/100 g, ‘Amager 23’: 20.4 mg/100 g, ‘Amsterdam’: 20.5 mg/ 100 g, ‘QD-104’: 18.0 mg/100 g, and ‘Marktgärtner’: 17.9 mg/100 g; and the lowest: ‘Flakkeer 151’: 13.0 mg/100 g, ‘Braunschweig’: 13.7 mg/100 g, and ‘Duwicker’: 14.2 mg/100 g.
   When calculated against area units, the highest -carotene contents were found with the cultivars ‘Amsterdam’, ‘Marktgärtner’, ‘D-95’ and ‘Amager 23’.

4. The largest dry matter amount had the cultivar ‘Braunschweig’ (13.81%) and the lowest the cultivar ‘D-95’ (10.5%). When calculated against the area unit, the highest amount of dry matter was found with the cultivars ‘Duwicker’ and ‘Flakkeer 151’, and the lowest with ‘Chantenay’.

5. Earlier sowing period proved more favourable than the later one.

6. Later harvest period provides larger total and -carotene contents.

II Symposium on Timing of the Fieldproduction of Vegetable Crops

P. Pavlek, R. Heneberg, D. Horgas

https://doi.org/10.17660/ActaHortic.1975.52.32