Effect of sowing date and plant density on bolting of four sugar beet (Beta vulgaris L.) varieties

Abstract

This experiment was conducted in Homs Agricultural Research Station, Homs, Syria during 2007/2008 and 2008/2009 seasons to study the effect of sowing date and plant density on bolting for four sugar beet varieties, tow are monogerm varieties i.e. Parade and Etna, while the other are multigerm varieties i.e. Nadir and Mammoth. Three sowing dates were applied, began from 15/9 to 15/10, the interval between the sowing dates was 15 days. Three plant densities were executed (133 000, 100 000 and 80 000 plantha-1). Split plot design was used with three replicates. The combined analysis exhibited the significant effect of varieties (V), sowing dates (S), and plant densities (D) on all types of bolting (Early, medium, late and total). Least significant test (L.S.D 0.05) clarified that early autumn sowing (15/9 and 1/10) increased total bolting percent 74.86 and 44.88 % respectively, as compared with date (15/10) 15.57% (control). The plant density (133 000 plant ha-1) decreased total bolting percent 43.56% as compared with the other plant densities (80 000 and 100 000 plant ha-1) 46.35 and 45.40% respectively. The results showed that the monogerm varieties were superior and more resistant to bolting as compared with the multigerm ones. DOI: http://dx.doi.org/10.3126/ije.v4i2.12647 International Journal of Environment Vol.4(2) 2015: 256-270

Effect of Different Sowing Dates on Quantity and Quality of Some Promising Sugar Beet ( Beta vulgaris L.) Varieties under North Delta, Condition

“…This can be attributed to early planting allows the early development of an optimal leaf surface area that is available when the environment is most suitable for maximum assimilation of energy and subsequent transfer of photosynthesis to the storage top. These results are in agreement with the finding of Nikpanah et al (2010), Al-Jbawi et al (2015 and Nikpanah et al (2015).…”

“…Results presented in Table 10 pointed out that extractable sugar percentage (ES%), sucrose loss to molasses (SLM) as well as Na, K and α-amino N were significantly affected by the interaction between sowing dates and beet varieties. Sowing Ras Poly in optimum date on 1 st October gave the highest ES % and lowest SLM % as well as Na, K and α-amino N because the correlation between these traits is negative (Al-Jbawi et al, 2015). On the other hand, the impurities content, i.e.…”

“…On the other hand, Azzazy (1998) showed that none of the studied characters was significantly affected by the two sowing dates except top yield. A delay in sowing results in losses of root weight, root yield and sugar yield, but percentage of dry matter was significantly increased (Kolble & Petzold, 2002;Sogut & Arioglu, 2004;Nikpanah et al, 2010;Al-Jbawi et al, 2015). Leilah et al ( 2005) concluded that sowing sugar beet on first of October produced the highest values of length, diameter and fresh weight of roots, purity percentage as well as root, top and sugar yields ha -1 .…”

Quality changes in sugar beet (Beta vulgaris L.) roots during storage period in piles

“…Sugar beet, internationally is considered the second source of sugar, and represents 40% of the total sugar production in the world, while sugar cane is considered the first source of sugar and represents 60% of the total sugar production. Sugar beet is the main and only source of sugar in Syria (AL Jbawi et al, 2015). The main area for growing sugar beet in Syria is in Al Ghab, the total area is about 6 thousand hectares, which produced 316855 tons of roots, while the yield is 49.5 ton.…”

Impact of some chemical treatments and length of storage on the storability of sugar beet

“…Sugar beet (Beta vulgaris L.) is the second important sugar crop after sugar cane; produce about 30 % of total world production and have readily adaptable to different environmental factors including climate (El Hag Mohammad et al, 2015). Sugar beet is the main and only source of sugar in Syria (AL Jbawi et al, 2015a). Al Ghab is the main area for growing sugar beet in Syria (Al Jbawi et al, 2011).…”