|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|5769448||1413240||2018||9 صفحه PDF||ندارد||دانلود کنید|
â¢Strawberry plants flowered and fruited during winter growing conditions, regardless of response time.â¢Certain cultivars fruited better during certain months, regardless of response time.â¢âEvie-2â, âEvieâ2+â and âPortolaâ plants produced the highest berry yield.â¢âChandlerâ and âSeascapeâ berries contained the lowest concentrations of sugars.â¢Overall, âSeascapeâ berries contained the highest concentration of phytonutrients.
In many areas of the US, fresh locally grown berries are not available during the winter. With this in mind, a research study comprised of three experiments was conducted focused on cultivar selection for berry yield, number, sweetness and phytonutrient content. Using a capillary mat system with under bench heating within a double-layer polyethylene greenhouse, strawberries were grown in the Great Plains Region of the US during the winter. During experiment 1, 12 cultivars were grown; berries were weighed, counted and analyzed for sugars and phytonutrients. âAlbionâ plants produced a high number/mass of berries, had relatively high sugar content but a lower level of phytonutrients when compared to other cultivars. Sugar and phytonutrients concentrations overlapped across cultivars and thus, one cultivar could not be statistically singled out as best. As all cultivars flowered and fruited, two additional 8-month-long experiments were conducted. It took only 7 weeks from potting of dormant crowns for most cultivars to produce fruit. Certain cultivars fruited more successfully during certain months than others, but this was not associated with response time. For example,â âAlbionâ, âChandlerâ, âDarselectâ, âEvie-2â² and âSeascapeâ plants consistently produced fruit October to early January while âAC Wendyâ, âCavendishâ, âHoneoyeâ and âStrawberry Festivalâ plants mainly produced berries in March/April. Summed over experiment 2, âAlbionâ, â Cavendishâ, âChandlerâ, â Evie-2â, âPortolaâ and âSeascapeâ plants produced the greatest mass of berries. âAC Wendyâ and âDarselectâ berries contained some of the highest levels of sugars while berries from âChandlerâ, âDarselectâ, âEvie-2â², âSeascapeâ and âStrawberry Festivalâ had some of the highest phytonutrient values. In the third experiment, of the 8 selected cultivars, âEvie-2â², âEvieâ2+â and âPortolaâ plants had the highest total yield and average berry mass/plant. âSeascapeâ andâ Chandlerâ plants were second in total production. Glucose, fructose and sucrose levels varied across cultivars with âChandlerâ and âSeascapeâ berries possessing the lowest level of total sugars. Phytonutrient values varied among cultivars with some having better flavonoids (âSeascapeâ), phenols (âSeascapeâ and âChandlerâ) and ant oxidant capacity (âSeascapeâ, âEvie-2â and âCavendishâ). Measurement of soluble solids concentration varied by week among the cultivars with âSeascapeâ, âSeascape+â, and âAlbionâ berries possessing higher levels than other cultivars such as âCavendishâ. Overall, under these winter greenhouse conditions using capillary mat fertigation and an under-bench heat delivery system, strawberries were successfully produced for the off-season market.
Journal: Scientia Horticulturae - Volume 227, 3 January 2018, Pages 1-9