Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada.
Guelph Research & Development Centre, Agriculture & Agri-Food Canada, Guelph, ON, Canada.
J Sci Food Agric. 2019 Sep;99(12):5457-5474. doi: 10.1002/jsfa.9807. Epub 2019 Jun 3.
The aim of this study was to investigate the effects of variety (Nantes and Imperator), soil fertility status (high and low) and agronomic treatments on yield and quality traits of carrot composition and sensory factors. The treatments compared synthetic nitrogen at conventionally recommended amounts with compost-sourced nitrogen (high and low rates) and a range of amendments (compost, compost tea, micronutrients and foliar treatments). Additionally, we intended to identify factors affecting polyacetylene accumulation in carrots, owing to the growing interest in their health effects and paucity of agronomic information on their bioaccumulation in carrots.
Imperator accumulated more minerals, produced more phytochemicals and had higher antioxidant capacity than Nantes, which had more carotenoids. However, consumers preferred the flavor of Nantes over Imperator. High-fertility soil produced carrots of superior nutritional quality than did low-fertility soil, regardless of year-of-application amendments, the effects of which were often variety-dependent. High soil biological activity was able to overcome low fertility status and stimulate greater yield. Carrot phosphorus was correlated with falcarindiol biosynthesis. Chlorogenic acid and falcarindiol were correlated with antioxidant capacity, but not falcarinol or total phenolic compounds.
Carrots were not strongly affected by agronomic treatments in terms of yield or phytochemical status; however, soil biological activity overcame a soil nutrient deficit in terms of yield. Phenolic compounds and antioxidant status were generally higher in the high-fertility site, whereas polyacetylenes were variety-dependent. Chlorogenic acid and falcarindiol were associated with antioxidant capacity, but not total phenolic compounds and carotenoids. © 2019 Society of Chemical Industry.
本研究旨在探讨品种（南特和帝王）、土壤肥力状况（高和低）和农业措施对胡萝卜组成和感官因素的产量和品质特性的影响。与常规推荐用量的合成氮相比，处理方法比较了堆肥来源的氮（高和低水平）和一系列改良剂（堆肥、堆肥茶、微量元素和叶面处理）。此外，由于人们对其健康影响越来越感兴趣，而且对其在胡萝卜中的生物累积的农艺信息很少，我们还打算确定影响胡萝卜中多炔积累的因素。
帝王比南特积累了更多的矿物质，产生了更多的植物化学物质和更高的抗氧化能力，而南特则含有更多的类胡萝卜素。然而，消费者更喜欢南特的味道而不是帝王的味道。高肥力土壤生产的胡萝卜比低肥力土壤生产的胡萝卜具有更高的营养品质，而与当年应用的改良剂无关，改良剂的作用往往取决于品种。高土壤生物活性能够克服低肥力状况并刺激更大的产量。胡萝卜磷与法卡林二醇生物合成有关。绿原酸和法卡林二醇与抗氧化能力有关，但与法卡醇或总酚类化合物无关。
就产量或植物化学物质状况而言，胡萝卜受农业措施的影响不大；然而，就产量而言，土壤生物活性克服了土壤养分不足的问题。高肥力土壤中的酚类化合物和抗氧化状态通常较高，而多炔则取决于品种。绿原酸和法卡林二醇与抗氧化能力有关，但与总酚类化合物和类胡萝卜素无关。© 2019 化学工业协会。
