Escuela Técnica Superior de Ingenieros Agrónomos y de Montes, Universidad de Castilla-La Mancha, Campus Universitario, Albacete, Spain.
Escuela Técnica Superior de Ingenieros Agrónomos y de Montes, Universidad de Castilla-La Mancha, Campus Universitario, Albacete, Spain.
Sci Total Environ. 2018 Sep 1;634:1092-1099. doi: 10.1016/j.scitotenv.2018.04.090. Epub 2018 Apr 12.
The present study analyses the health-promoting compounds of walnut oil and walnut defatted flour obtained using hydraulic pressing. To identify the cultivar effect, nine walnut varieties were harvested in the same plot for two years to control environmental and agricultural management effects on kernel chemical traits. Beyond the variability reported in the products obtained from the different cultivars analysed, the crop year showed a crucial effect in the nutritional value of walnut products. Specifically, the variability caused for the crop year in the concentration of oleic and linoleic acids, phytosterols, polyphenols, tocopherols, proteins and essential minerals (K, Mg, P, S, Cu, Fe, Mn, Mo, Ni) was greater that the reported for the genotype. These findings suggest that the nutritional value of walnut oil and walnut flour depends on the crop season largely than expected, even when average annual weather conditions are similar. As a result, focus must change in the study of cultivar effect on walnut products to a wider analysis of specific variables related to crop year conditions.
本研究分析了液压压榨法获得的核桃油和核桃脱脂粉中的促进健康化合物。为了分析品种效应，在同一块地中连续两年收获了 9 个核桃品种，以控制环境和农业管理对核仁化学特性的影响。除了不同品种分析得到的产品中已经报道的可变性外，作物年份对核桃产品的营养价值也有至关重要的影响。具体而言，作物年份引起的油酸和亚油酸、植物甾醇、多酚、生育酚、蛋白质和必需矿物质（K、Mg、P、S、Cu、Fe、Mn、Mo、Ni）浓度的变化大于基因型的报道。这些发现表明，核桃油和核桃粉的营养价值在很大程度上取决于作物季节，即使平均年度天气条件相似。因此，必须改变对核桃产品品种效应的研究重点，以更广泛地分析与作物年份条件相关的具体变量。
