Abstract
Choice of the harvest date is one of the foundations of vintage quality and good-yield sugar in sugar beet. However, it is difficult to define the harvest date and more precisely the date of maturity of beet roots, in an exact and absolute way. Indeed, maturity is divided into several stages and degrees depending on environmental and climatic conditions such as temperature, precipitation, geographic area, and others. The present study evoked the effect of three harvest dates (at esteemed maturity, 7 days after maturity, and 15 days after maturity) on the technological quality parameters, namely, sucrose, nitrogen, potassium, and sodium, using the most popular chemometric method, principal component analysis (PCA). To do this, samples from the Tadla irrigated perimeter were used. The results of exploratory analyses by the application of PCA clearly showed the influence of harvest date, in an important way, on the three quality parameters, composition of sucrose, potassium, and sodium. But, for nitrogen composition, there were negligible variations between samples.
Highlights
Sugar beet (Beta vulgaris L.) is a dicotyledon belonging to the Chenopodiaceae family known today by Amaranthaceae and from the Caryophylla order which has a photosynthetic system C3 [1]
Is univariate descriptive study of variables in the raw state made it possible to suspect the presence of outliers. It made it possible to justify the application of the principal component analysis (PCA) on centered-reduced data. at is to say, a multivariate descriptive analysis is carried out, independent of the measurement scales of the parameters studied
Descriptive Analysis of Sugar Beet Quality Parameters in ree Harvest Dates by ACP. e objective of principal component analysis is purely descriptive: it is a question of “exploring” a set of observations gathered in the form of a table of data indicating for each statistical unit the observed values of a certain number of quantitative variables
Summary
Sugar beet (Beta vulgaris L.) is a dicotyledon belonging to the Chenopodiaceae family known today by Amaranthaceae and from the Caryophylla order which has a photosynthetic system C3 [1]. Nadori et al [18] studied the influence of rootstock and harvest date on fruit quality of mandarin during cold storage, Esmaeilpour and Shakerardekani [19] studied the effects of early harvest times on nut quality and physiological characteristics of pistachio (Pistacia vera) trees, Doua and Shid [20], for their part, studied the influence of harvest season on volatile aroma constituents of two banana cultivars, Feyem et al [21] studied the influence of harvest date on seed germination of some varieties of rainfed rice, and Dibi et al [22] determined the harvest period of sweet potato varieties It is in this context that this work was carried out with the objective of studying the effect of harvest date of sugar beets, precisely after a delay of 5, 10, and 15 days, on its technological quality, sucrose, and the melassogenic elements. Statistical analyses of the various analytical data were performed using Unscrambler version 10.2 software
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