Lower RH levels lead to greater water loss and RH levels that are too high may lead to condensation and the enhanced growth of pathogens. The optimal RH for postharvest storage of most fruit species is between 90–95%. Temperature is the most important environmental factor affecting fruit quality after harvest, as low storage temperatures reduce respiration, water loss and pathogen growth, but can also cause chilling injury (CI). The postharvest storage performance of oranges is greatly influenced by the environmental conditions under which the fruits are stored, especially temperature and relative humidity (RH). Other pre-harvest features, such as tree age and yield, may affect the sugar and acidity levels, firmness and physiological behaviors, manifested as respiration and the rate of ethylene production. It has also been reported that the maturity stage at harvest may affect peel pitting during storage. Furthermore, early-harvested oranges are relatively sensitive to postharvest chilling injury and more tolerant to postharvest decay, whereas late-harvested fruits are more tolerant to chilling, but more sensitive to microbial spoilage. For example, during ripening, the fruit undergoes continuous metabolic changes, such as the accumulation of sugars and a decrease in acidity levels, which cause changes in fruit flavor and nutritional quality over the course of the ripening period. Pre-harvest features such as climate conditions, cultivation practices, harvest time, choice of rootstock, tree age and yield may affect postharvest quality. The postharvest storage performance of oranges may be affected by various pre-harvest and postharvest features. For these reasons, it is a widely cultivated late-season cultivar in several citrus-growing countries, including Israel, and ‘Rustenburg’ fruits are commercially stored for relatively long periods of up to 3–4 months, in order to extend the marketing season. ‘Rustenburg’ navel orange, which originated in South Africa, is a high-quality late-season orange that is seedless, relatively easy to peel, has a rich fruity flavor and is excellent for fresh consumption. Oranges, similar to other citrus fruits, are very popular and consumers appreciate their delicate, fruity and refreshing flavor, as well as their high nutritional value. Orange ( Citrus sinensis) is the world’s fifth largest fruit crop (after banana, watermelons, apples and grapes), with an annual global production of 75.4 million tons.
#Harvest hoc casa grande full
It allowed for the prediction of fruit-acceptance scores among the full data set, with a root mean square error (RMSE) of 0.217 and an R 2 of 0.891. Extreme gradient boosting (XGBoost) combined with a duplication approach was found to be the most effective approach. Four regression models were evaluated for their ability to predict fruit quality based on pre-harvest and postharvest features. The examined features significantly affected ( p < 0.001) fruit weight loss, firmness, decay, color, peel damage, chilling injury, internal dryness, acidity, vitamin C and ethanol levels, and flavor and acceptance scores. Storage time was found to be the most important feature affecting fruit quality, followed by storage temperature, harvest time, yield and humidity. All together, we evaluated 12,000 oranges (~4 tons) from six different orchards and conducted 170,576 measurements of 14 quality parameters.
The examined pre-harvest features included harvest time and yield, and the examined postharvest features included storage temperature, relative humidity during storage and duration of storage. We conducted a large-scale, high-throughput phenotyping analysis of the effects of various pre-harvest and postharvest features on the quality of ‘Rustenburg’ navel oranges, in order to develop shelf-life prediction models to enable the use of the First Expired, First Out logistics strategy.
0 kommentar(er)
