Studying the effect of different planting and harvesting dates on the quantitative and qualitative yield of sugar beet under transplanting conditions | ||
| چغندرقند | ||
| Articles in Press, Accepted Manuscript, Available Online from 07 February 2026 | ||
| Document Type: Scientific - Research | ||
| DOI: 10.22092/jsb.2026.370386.1393 | ||
| Authors | ||
| Siavash Farajian1; Elnaz Farajzadeh* 1; Afsaneh Yousefpour2; Heydar Azizi3 | ||
| 1Islamic Azad University, Malekan Branch | ||
| 2Islamic Azad University, Mahabad Branch | ||
| 3Assistant Professor of Sugar Beet Research Department, West Azarbayjan Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (ARREO). Urmia, Iran. | ||
| Abstract | ||
| Sugar beet (Beta vulgaris) is one of the main sources of sugar production after sugarcane (Saccharum officinarum). The planting date is one of the most important factors affecting the yield and quality of sugarbeet. This study was carried out in Miandoab county in 2023 crop season, as a split plot in randomized complete block design with four replications .three planting dates (Febuary 28; March 20; March 29) and three harvesting times (Julay 6; August 6; October 7) were allocated to main and sub plots, respectively. The cultivar used in this experiment was Novodoro. After harvesting, weighting and polping the root in mentioned harvesting dates, quantitative and qualitative yield related traits including root yield (RY), sugar content (SC), white sugar content (WSC), sugar yield (SY), white sugar yield (WSY), Na, K and α-amino nitrogen as root impurities, alcality (Alc), extraction coefficient of sugar (ECS) and the percent of molasses sugar (MS) were quantified. In order to data analyzing, SAS software Ver. 9.1 was used. The ANOVA results showed that the effect of planting date factor as the main factor on all traits was significant at 0.01 probability level. The effect of harvest date factor was significant on molasses sugar content at at 0.05 probability level and significant at 0.01 probability level for other ones. Based on the results, the interaction effect of these two factors on all traits was significant at 0.01 probability level, suggesting that these two factors are affected by both and their role in achieving quantitative and qualitative yield. Comparison of mean of interaction between planting date with harvest date showed that planting in March 20, and harvesting at October 7, with average of 85.57 t.ha-1 had the highest root yield. In this experiment, root yield was increased in all four planting times by delaying harvesting date. Also, in all three harvesting dates, the highest root yield was attributed to the planting March 20 date. Considering that white sugar yield is the most important and economic trait in sugar beet, the conclusion is made based on this trait. In this experiment, the maximum white sugar yield was attributed to the treatments planted on March 20, transplanted and harvested on August 6 and October 7. | ||
| Keywords | ||
| Correlation; Cultivation system; Growth period length; Sugar; Sugar content | ||
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