scholarly journals Achieving robustness across season, location and cultivar for a NIRS model for intact mango fruit dry matter content

2020 ◽  
Vol 168 ◽  
pp. 111202 ◽  
Author(s):  
N.T. Anderson ◽  
K.B. Walsh ◽  
P.P. Subedi ◽  
C.H. Hayes
2017 ◽  
Vol 226 ◽  
pp. 316-321 ◽  
Author(s):  
Nicholas T Anderson ◽  
Phul P. Subedi ◽  
Kerry B. Walsh

2006 ◽  
Vol 57 (4) ◽  
pp. 419 ◽  
Author(s):  
Mathieu Léchaudel ◽  
Jacques Joas

The effects of harvest date (5 dates, between 100 and 140 days after full bloom) and carbon supply (2 leaf-to-fruit ratios, 10 and 100) on mango fruit (cv. Cogshall) quality and maturity were studied to find reliable indicators that take fruit physiological maturity into account and to establish a compromised harvest date according to the market. Fruit size and density varied with regard to the harvest date and assimilate supply. Changes in total soluble solids and titratable acidity were well correlated with concentrations of major soluble sugars and organic acids. Potassium concentration was increased according to harvest date. Metabolic changes occurred at 126–133 and 133–140 days after full bloom in fruit subjected to non-limited and stress conditions of assimilate supply, respectively. During this stage, sucrose and malic acid concentrations strongly increased, whereas those of starch and citric acid decreased according to the leaf-to-fruit ratio treatment. Synthesis of 1-aminocyclopropane-1-carboxylic acid (ACC) and malonyl ACC, and a rapid increase in the respiration rate were observed during this period. The shortage of assimilate supply delayed the onset of maturation and reduced its intensity. Storage quality of mango cv. Cogshall may be influenced by assimilate supply since the K+ to Ca2+ ratio and the pulp dry matter content, in particular, were enhanced in fruit from the 100 leaf-to-fruit ratio treatment. Results for mango cv. Cogshall suggested that total soluble solids, sucrose, and malic/citric acid ratio can be used as physiological indices for mango fruit, whereas fruit fresh mass, density, and pulp dry matter content can be useful indicators for when to harvest fruit. It appeared that 133 days after full bloom was an optimal harvest date for fruit grown under non-limited conditions of assimilate supply, for a market where the time between harvest and consumption of fruit is short.


2002 ◽  
Vol 77 (6) ◽  
pp. 773-777 ◽  
Author(s):  
M. Lechaudel ◽  
M. Genard ◽  
F. Lescourret ◽  
L. Urban ◽  
M. Jannoyer

2009 ◽  
Vol 57 (2) ◽  
pp. 119-125
Author(s):  
G. Hadi

The dry matter and moisture contents of the aboveground vegetative organs and kernels of four maize hybrids were studied in Martonvásár at five harvest dates, with four replications per hybrid. The dry matter yield per hectare of the kernels and other plant organs were investigated in order to obtain data on the optimum date of harvest for the purposes of biogas and silage production.It was found that the dry mass of the aboveground vegetative organs, both individually and in total, did not increase after silking. During the last third of the ripening period, however, a significant reduction in the dry matter content was sometimes observed as a function of the length of the vegetation period. The data suggest that, with the exception of extreme weather conditions or an extremely long vegetation period, the maximum dry matter yield could be expected to range from 22–42%, depending on the vegetation period of the variety. The harvest date should be chosen to give a kernel moisture content of above 35% for biogas production and below 35% for silage production. In this phenophase most varieties mature when the stalks are still green, so it is unlikely that transport costs can be reduced by waiting for the vegetative mass to dry.


2020 ◽  
pp. 16-19
Author(s):  
Е.В. Янченко

Цель исследований – дать оценку сохраняемости и болезнеустойчивости современных сортов и гибридов моркови столовой и определить корреляционные зависимости влияния биохимических показателей качества на сохраняемость и степень поражения моркови столовой различными видами болезней в процессе хранения. Исследования проводились в 2011–2016 годах во ВНИИО – филиале ФГБНУ ФНЦО по общепринятым методикам. В биохимической лаборатории отдела земледелия и агрохимии содержание сухого вещества определяли высушиванием до абсолютно сухого веса, общего сахара – по Бертрану, аскорбиновой кислоты – по Мурри, нитраты – ионоселективным методом. При характеристике моркови столовой важнейший показатель, определяющий его качество – количество сухого вещества и сахаров. В процессе хранения были выявлены следующие болезни моркови: серая гниль (Botrytis cinerea Pers. ex Fr.), белая гниль (Sclerotinia sclerotiorum (Lib.)), белая парша (Rhizoctonia carotae Rad.), альтернариоз (Alternaria radicina M., Dr. et E.). В большей степени сортообразцы моркови столовой поражались серой гнилью. Лучшими по сохраняемости сортообразцами были Корсар (94,6%), F1Берлин (94,5%), Берликум Роял (94,1%) и F1 Звезда (94%). Сохраняемость у зарубежных сортов и гибридов моркови столовой была немного выше, чем у отечественных (на 0,4%) как за счет меньшей величины убыли массы (6,3% против 6,4%), так и потерь от болезней (1,6% против 1,9%). Сохраняемость корнеплодов моркови находится в прямой корреляционной зависимости от содержания сухого вещества (r=+0,41), каротиноидов (r=+0,39), моносахаров (r­=+0,30) и суммы сахаров (r=+0,27). Проявление серой гнили находится в обратной корреляционной связи с содержанием сухого вещества и каротиноидов (r=-0,37 и r=-0,35 соответственно), белой парши – в прямой корреляции с содержанием сухого вещества , моносахаров и дисахаров (r= +0,21; r= +0,39; r= -0,41 соответственно), белой гнили в обратной корреляционной связи с содержанием сухого вещества, моносахаров и дисахаров. The purpose of the research is to assess the persistence and disease resistance of modern varieties and hybrids of carrots and to determine the correlation between the influence of biochemical quality indicators on the persistence and degree of damage to carrots by various types of diseases during storage. The research was conducted in 2011–2016 at ARRIVG – branch of FSBSI FSVC, according to generally accepted methods. In the biochemical laboratory of the Department of Agriculture and Agrochemistry, the dry matter content was determined by drying to absolutely dry weight, total sugar – by Bertran, ascorbic acid – by Murri, nitrates – by the ion-selective method. When describing carrots, the most important indicator that determines its quality is the amount of dry matter and sugars. During storage, the following diseases of carrots were detected: gray rot (Botrytis cinerea Pers. ex Fr.), white rot (Sclerotinia sclerotiorum (Lib.), white scab (Rhizoctonia carotae Rad.), alternariasis (Alternaria radicina M., Dr. et E.). To a greater extent, varieties of table carrots were affected by gray rot. The best preserved varieties were Corsar (94.6%), F1 Berlin (94.5%), Berlicum Royal (94.1%) and F1 Zvezda (94%). The persistence of foreign varieties and hybrids of table carrots was slightly higher than that of domestic ones by 0.4%. both due to a smaller amount of weight loss (6.3% vs. 6.4%) and losses from diseases (1.6% vs. 1.9%). The persistence of carrot root crops is directly correlated with the content of dry matter (r=+0.41), carotenoids (r=+0.39), monosaccharides (r=+0.30) and the amount of sugars (r=+0.27). The manifestation of gray rot is in inverse correlation with the content of dry matter and carotenoids (r=-0.37 and r=-0.35, respectively), white scab is in direct correlation with the content of dry matter (r= +0.21; r= +0.39; r= –0.41, respectively), white rot is in inverse correlation with the content of dry matter, monosaccharides and disaccharides.


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