Nitrogen requirement of fodder and sugar beet (<i>Beta vulgaris</i>L.) cultivars under high-yielding conditions of northwestern Europe

Koch, H.; Laufer, Daniel; Nielsen, Otto; Wilting, P.

doi:10.1080/03650340.2016.1143929

Cited by 10 publications

(3 citation statements)

References 36 publications

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“…In England, sugar beets are fertilized using 100-110 kg N/ha as an equilibrating rate between fertilizer prices and beet value [10]. In Germany, a maximum yield of sugar beet was achieved by adding an amount in the range of 100-125 kg N/ha [11], while, in Greece, maximum yield was expected from using 252.5 kg N/ha because it showed a quadratic response to nitrogen levels [12]. Moreover, Hosseinpour et al [13], in Iran, showed that fertilizing sugar beet using zero N significantly increased sugar percentage in the first season, while it was not influenced by N levels in the second season.…”

Section: Introductionmentioning

confidence: 99%

Interactive Effects of Gibberellic Acid and Nitrogen Fertilization on the Growth, Yield, and Quality of Sugar Beet

Leilah

Khan

2021

Agronomy

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Two field trials were conducted during the 2014/2015 and 2015/2016 seasons at Aweesh Al-Hagar Village, center of Mansoura, Dakahlia Governorate, Egypt. A split-split-plot design with four replicates was used. The main plots were assigned three nitrogen fertilizer levels, i.e., 165, 220, and 275 kg/ha. The sub-plots were restricted to four gibberellic acid (GA3) concentrations, i.e., 0, 80, 160, and 240 mg/L, and the sub-sub plots received GA3 application twice, i.e., 60 and 120 days after planting (DAP). The results showed that both root length and diameter, root and foliage fresh weights/plant, and root and foliage yields/ha increased with the incremental level of nitrogen and/or GA3 concentration. Foliar application of GA3 and N-fertilizers also significantly decreased quality parameters including sucrose and total soluble solid (TSS) percentages. Early application of GA3 (60 DAP) had an active role on sugar beet growth, yield, and quality compared with spraying at 120 DAP. Generally, fertilizing sugar beet with 275 kg N/ha or spraying GA3 with a concentration of 160 mg/L at 60 DAP is the recommended treatment for raising sugar yield under the ecological circumstances of this research.

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Section: Introductionmentioning

confidence: 99%

Interactive Effects of Gibberellic Acid and Nitrogen Fertilization on the Growth, Yield, and Quality of Sugar Beet

Leilah

Khan

2021

Agronomy

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“…The purified sugar content was calculated as the difference between sugar content and standard sugar losses in molasses. The gross sugar yield was defined as the product of yield and sugar content, and the total yield of purified sugar was calculated as the product of yield and purified sugar content (Draycott, 2006;Koch et al, 2016;Barzegari et al, 2017).…”

Section: Figure 2 Spectrophotometermentioning

confidence: 99%

Technological Qualities of Sugar Beetroot Crops Under the Conditions of the Middle Cis-Ural Region

Islamgulov¹,

Исмагилов²,

Alimgafarov³

et al. 2020

PTQ

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The economic growth and welfare of the state largely dependent on the efficiency of the agro-industrial complex, including the beet-sugar subcomplex. In Russia, including the middle CIS-Ural region, sugar beet is the main technical crop that provides raw materials for the sugar industry. More than 70 % of the area is sown in the Central and Southern Federal Districts. On the territory of the middle CIS-Ural region, sugar beet is currently cultivated on an area of more than 100,000 ha (Kornienko, 2014) The purpose of the research was to identify the productivity and technological quality patterns of new sugar beet hybrids, the influence of varietal characteristics on the content of molassigenic sub-stances, nitrogen fertilizer dosage, crop density and harvest time to obtain the highest yield of root crops with high technological qualities in the middle CIS-Ural region of Russia. Four field studies were conducted. The sugar content was determined by cold digestion with saccharimeter-polarimeter. To determine the α-amino nitrogen, the method of Stanek and Pavlas modified by Wininger and Kubadinov was used. The results showed that with an increased dose of nitrogen fertilizer, the sugar content of the root crops naturally decreased. As the crop density increased, the sugar content also increased. The highest sugar content in the root crops was revealed at a crop density of 95,000 and 110,000 plants/ha. The authors proposed recommendations to obtain the highest gross yield of purified sugar in sugar beet cultivation: for early harvesting – cultivate a sugar beet hybrid of normal-sugary type (Christella), for late harvesting – a hybrid of yielding type (HM-1820); apply nitrogen fertilizer at a dose of 160 kg of active agent/ha;cultivate sugar beet with a density of 95,000 plants per hectare; remove sugar beetroot crops with modern beet harvesters on October 10–25.

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“…Jaggard et al [20] reported that an amount of 100-110 kg N ha −1 is efficient to achieve a balance between the value of sugar beet and fertilizer prices in England. Koch et al [21] found that an optimal N rate of 100-125 kg N ha −1 is required to accomplish the maximum RY in Germany. However, in Greece, the optimal N rate can reach up to 252.5 kg N ha −1 [22].…”

Section: Introductionmentioning

confidence: 99%

Estimating Chlorophyll Content, Production, and Quality of Sugar Beet under Various Nitrogen Levels Using Machine Learning Models and Novel Spectral Indices

Elsayed,

El-Hendawy,

Elsherbiny

et al. 2023

Agronomy

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Accurately estimating crop performance under various fertilizer levels in a rapid and non-destructive manner has become a vital aspect of precision agriculture technology for both economic and environmental benefits. This study aimed to estimate different sugar beet parameters, such as total chlorophyll (Chlt), chlorophyll a (Chla), chlorophyll b (Chlb), root yield (RY), sugar yield (SY), and sugar content (SC) under five nitrogen (N) levels (0, 30, 60, 90, and 120 kg N ha−1). This was achieved by using a combination of the gradient boosting regression (GBR) model with published and newly developed two- and three-band spectral indices (2D- and 3D-SRIs). The results showed that the N levels had the highest proportion of variations (80.4–92.9%) for all parameters, except for SC, which had more variation (59.9%) according to year than the N levels (37.2%). All parameters, except SC, showed a significant increase with gradually increasing N levels. Additionally, the N levels displayed linear and strong positive relationships with the chlorophyll parameters, and linear and strong negative relationships with SC, while these relationships were quadratic and strong with RY and SY. Several published and novel 3D-SRIs exhibited moderate to strong relationships (R2 = 0.65–0.89) with all parameters. The newly developed 3D-SRIs, which involve wavelengths from the visible, near-infrared, and red-edge regions, such as NDI536, 538, 534, NDI738, 750, 542, and NDI448, 734, 398, were effective in accurately estimating all parameters. Combining 2D-SRIs, 3D-SRIs, and the aggregate of all spectral indices (ASRIs) with GBR models could be a robust strategy for estimating the six observed parameters with reasonable precision. The GBR-ASF-6 SRIs and the GBR-ASF-7 SRIs models performed better in predicting Chl content and SC with R2 values of 0.99 and 0.99 (RMSE = 0.073 and 1.568) for the training dataset and R2 values of 0.65 and 0.78 (RMSE = 0.354 and 6.294) for the testing datasets, respectively. The obtained results concluded that published and newly developed 3D-SRIs, GBR based on 2D-SRIs or 3D-SRIs, and the aggregate of all ASRIs can be used in practice to accurately estimate the Chl content, production, and quality of sugar beet across a wide range of N levels under semiarid conditions.

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Nitrogen requirement of fodder and sugar beet (Beta vulgarisL.) cultivars under high-yielding conditions of northwestern Europe

Cited by 10 publications

References 36 publications

Interactive Effects of Gibberellic Acid and Nitrogen Fertilization on the Growth, Yield, and Quality of Sugar Beet

Interactive Effects of Gibberellic Acid and Nitrogen Fertilization on the Growth, Yield, and Quality of Sugar Beet

Technological Qualities of Sugar Beetroot Crops Under the Conditions of the Middle Cis-Ural Region

Estimating Chlorophyll Content, Production, and Quality of Sugar Beet under Various Nitrogen Levels Using Machine Learning Models and Novel Spectral Indices

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