The effects of line spacing and harvest time on processing yield and root size of carrot for Cenourete® production

Abstract

The effect of line spacing and harvest time on carrot and Cenourete ® , a baby carrot-like product, yield were evaluated under conditions of Central Brazil winter. Seeds were sown in order to obtain 6, 8 and 10 lines/meter, what corresponded to a distance of 16.6, 12.5 and 10 cm between lines, respectively. Harvests were made 80, 90 and 100 days after sowing. The cultivars grown were open-pollinated Esplanada and hybrid SugarSnax 54. Root and Cenourete ® yield varied with all the main factors and no interaction was significant. The root yield of both cultivars increased with later harvest at each density level. Yield of Esplanada root was only marginally affected by line spacing. Although significant, the effect of plant density on the yield of SugarSnax 54 accounted for less than 5% of the variation in the data set and differences between means were not significant by Tukey (α= 0.05). Cenourete ® yield from Esplanada cultivar varied from 9.4+3.9 to 15.2+6.5 t/ha and from SugarSnax 54 it varied from 9.9+3.9 to 18.2+6.5 t/ha, depending on treatment. Anticipating harvest had a much greater effect in enhancing the recovery of Cenourete ® from carrot roots than increasing plant density. Although it didn't affect total yield, decreasing line spacing to 10 cm was important to assure that a larger proportion of thinner roots were produced and consequently the production of superior quality Cenouretes ® was higher. Harvest time was also important to determine the Cenourete ® size since the increase in total production at later harvest was due to a higher proportion of larger Cenouretes ® . The best combination line spacing x harvest time for Esplanada and SugarSnax 54 under the conditions of this experiment will depend whether the interest lies in the production of any or of a particular Cenourete ® size.

Accuracy of carrot yield forecasting using proximal hyperspectral and satellite multispectral data

“…Percentage of C1 decreased as the plant density increased while the percentage of C2 increased in line with plant density. As such, the results indicate that optimal plant density is important to produce a larger proportion of premium carrots (as defined by the market requirements of a particular size (class)) (Lana 2012). Significant relationships between percentage of oversize and waste carrots to plant density could not be established in this study.…”

Impact of some Agronomical Practices on Carrot Productivity and Nutritional Value تأثير بعض الممارسات الزراعية على إنتاجية الجزر و القيمة الغذائية

“…These differences in the yield and physical characters of the carrot cultivars are attributed to the genetic variations between the two cultivars. Similarly, Lana (2012) found differences in the root weight between cultivars. Also, Correia and Carvalho (2017) found significant differences in root length among Brazilian carrot cultivars.…”

“…In the case of closer spacing or higher plant density, competition among individual plants increases for essential growth factors which do not get their normal size (Norman et al, 1992). Root size, root weight and yield of carrot can be modified through refinements in the growing system especially population density (Lana, 2012). Similarly, at wider spacing, yield of individual plants will more, but yield per feddan may decline due to low plant density (Kharsan et al, 2019).…”

THE EFFECT OF DIFFERENT HARVEST DATES ON THE YIELD AND QUALITY OF THE GOLDEN THISTLE (Scolymus hispanicus L.)

“…This is considered to be the main reason of the decreasing root yields in August. Salter (1980) and Lana (2012) examined the relation between harvest time and root yield in carrot, they stated that the root yield increases with delaying harvest time. Heidari et al (2008), Ozturk et al (2008) and Sefaoglu et al (2016) studied the change of root yield according to the harvest time in sugar beet.…”