Response of Three Sugar Beet Varieties to Planting Density and Potassium Fertilizer Levels Under Sandy Soil Conditions

Abstract

Two field experiments were carried out at El-Khattara experimental farm, Faculty of Agriculture, Zagazig University, Sharkia Governorate, Egypt during the two successive seasons of 2011/2012 and 2012/2013. This study aimed to investigate the response of yield and quality of three multigerm sugar beet varieties (Rass Poly, Panther and Pleno) to three planting densities (28000, 33600 and 42000 plants/fad.) and three potassium fertilizer levels (0, 24 and 48 Kg K 2 O/fad.) in sandy soil under drip irrigation system. The combined analysis results showed that Pleno variety surpassed the other two investigated varieties in root length and diameter, fresh root weight/plant, root and recoverable sugar yields/fad. In addition, its roots contained lower percentages of Na and K. Planting density affected on all traits, where increasing plant density up to 42000 plants/fad., significantly decreased root length and diameter, fresh top and root weights/plant, Na, K, alpha amino-N percentages and sugar loss to molasses (%). On the other side, sucrose (%), purity (%), extractable sugar (%), top, root and recoverable sugar yields were significantly and gradually increased. Moreover, root length, sucrose, Na, K, α-amino-N, extractable sugar percentages, sugar loss to molasses (%) (SLM) top, root and recoverable sugar yields were significantly increased by adding 24 kg K 2 O/fad., while root diameter and fresh root weight/plant were significantly responded up to 48 kg K 2 O/fad. The interaction between the studied factors revealed that the maximum root and recoverable sugar yields/fad., could be obtained by planting Pleno variety with the dense planting of 42000 plants/ fad., and applying 24 kg K 2 O/fad.

Impact of Planting Density, Nitrogen and Potassium Fertilizer Levels on Yield and Quality of Sugar Beet

“…On the other hand, purity and sugar lost in molasses percentages showed insignificant response to the studied planting densities. The obtained results concerning sucrose and extractable sugar percentages are in concurrence with those recorded by Hozayn et al (2013), El-Hity et al (2014) and Yasin (2017) . However Refay (2000) indicated that planting densities had no significant effect on sugar percentage of sugar beet.…”

OBIAL AND ENZYMATIC ACTIVITIES OF SOYBEAN EFFECT OF PLANT SPACING AND FOLIAR APPLICATION WITH BORON ON YIELD AND QUALITY OF TWO SUGAR BEET (Beta vulgaris, L.) VARITIES

“…These results may be attributed to genetic factors as well as their interactions with the environmental conditions. The results of varieties in root diameter obtained in the paest study are in agreement with those obtained by Yasin (2017) and Teama et al (2018).…”

“…This increase may be due to the high competition between plants for plants growth resources. In those connection Ouda, Sohier (2005), Shalaby et al (2011) and Yasin (2017) reported that root length was increased by increasing plant spacing.…”

“…Sugar beet variety Farida gave the highest value of root yield/fad., sugar yield/fad., TSS% and sucrose % as compared with the other two sugar beet varieties in both seasons. Yasin (2017) found that Pleno variety surpassed the other two investigated varieties in root length, root diameter, root fresh weight/plant, root and recoverable sugar yields (ton/fad.). Teama et al (2018) indicated that Kawemira sugar beet variety gave the highest mean values of root length, root diameter, single root weight, root yield (ton/fad.…”

“…The highest significant values of sucrose and sugar yield were obtained with 20 cm spouts between hills; meanwhile, the purity percentage was recorded with 15 cm between hills, in both seasons. Yasin (2017) found that planting density affected all traits (root length, root diameter, root fresh weight/plant, root yield top yield sugar yield and sucrose and purity percentages in both seasons, Increasing planting density up to 42000 plants/fad. significantly decreased root length, root diameter and fresh top and root weights/plant.…”