The effect of temperature, water input and length of growing season on sugar beet yield in five locations in Greece

Abstract

SUMMARYFrom 1999 to 2006, 36 field experiments were conducted in five sugar beet growing areas in Greece (Larissa, Plati, Serres, Xanthi and Orestiada) to monitor yield. Locations differed significantly regarding thermal variables during the growing season with Xanthi having the most favourable thermal conditions (Tmax, average daily maximum temperature;Tmean, average daily mean temperature; GDD, growing degree days) for sugar beet growth. From early June to the end of the harvesting campaign, successive harvests were conducted. Over the years, fresh root weight and sugar yield at the last harvest of the season (FRWLH, SYLH) did not differ significantly among locations. Also, there were no significant differences among locations regarding GDD for maximum FRW and SY (GDDMFRW, GDDMSY), with the means over location estimated at 2639·9 and 2792·5 °C, respectively. Days after seeding (DAS) necessary for maximum yield (DASMFRW, DASMSY, respectively) differed among locations, with the longest period (DASMFRW206·4 days, DASMSY: 204·5 days) occurring in the northernmost location (Orestiada). Means for DASMFRWand DASMSYat the five locations were estimated at 190·4 and 188·9·days, respectively. Excluding Xanthi and combining the remaining locations, FRWLHand SYLHwere negatively correlated with the average temperatures (Tmean,TmaxandTmin, daily minimum temperature) over the growing season. The opposite was evident for Xanthi where sugar beet was grown under sub-optimal temperatures. The optimum meanTmaxof the five locations was estimated at 25·5 and 25·1 °C for FRWLHand SYLH, respectively. Elongation of the growing season, by means of early sowing, would increase yield by decreasing average temperatures (Tmean,Tmax) over the growing season in locations with the highest recorded temperatures (Larissa, Plati, Serres and Orestiada). In Xanthi, the projected temperature increase, as a result of climate change, is expected to have a positive effect on yields.

In-season Accumulation and Partitioning of Macronutrients and Micronutrients in Irrigated Sugar Beet Production

“…The increases in dry matter yield in the current study may be partially attributed to recent advances in sugar beet breeding (Loel et al, 2014;Hoffmann and Kenter, 2018) and changes in agronomic practices (Scott and Jaggard, 2000;El-Geddawy et al, 2008;Curcic et al, 2018). Location differences, including soil type (Goodman 1968;Webster et al, 1977) and temperature regime (Milford et al, 1980;Milford et al, 1985;Tsialtas and Maslaris, 2014) may also contribute to yield differences between the two studies.…”

Review: Sugar beets as a substitute for grain for lactating dairy cattle

“…In a German report, while the optimum mean temperature for beet growth was found to be 18 °C from sowing to the end of June, by harvest in October, the differences had disappeared [7]. Yields of sugar beets and sugar content of the beets planted in five temperature-diverse regions of Greece did not differ by harvest [8]. However, Wahab and Salih [3] determined that yields are highly dependent on the availability of water.…”