Widespread heterogeneity in staple crop mineral concentration in Uganda partially driven by soil characteristics
Widespread heterogeneity in staple crop mineral concentration in Uganda partially driven by soil characteristics
复制标题
DOI：
10.1007/s10653-020-00698-w
复制
发表时间：
2020-11-09
影响因子：
4.2
通讯作者：
Hestrin, Rachel
中科院分区：
文献类型：
--
作者：
Bevis, Leah Em;Hestrin, Rachel
钙（Ca）、铁（Fe）、硒（Se）和锌（Zn）缺乏症在撒哈拉以南非洲地区广泛存在，对人类健康造成严重影响。在乌干达，主要饮食严重依赖植物性斯台普斯，作物矿物质浓度是膳食矿物质摄入量的重要组成部分。评估营养素缺乏风险或以营养素为重点的干预措施的有效性的研究往往使用基于发达国家种植的作物的食物成分表来估计膳食矿物质摄入量。然而，人们对乌干达种植的作物的实际营养含量知之甚少。在这里，我们记录的钙，铁，硒，锌浓度的主要作物从乌干达家庭农场收集。虽然中位矿物质浓度与以前报道的相似，但作物矿物质浓度的变化很大，特别是Fe和Se。普通最小二乘回归分析表明，某些土壤特性与作物矿质元素含量相关。其中，土壤pH值往往与作物矿物质浓度呈正相关，而沙子和有机碳浓度与几种作物矿物质浓度呈负相关。然而，作物矿物质含量的变化与测量的土壤特性无关。总体而言，我们的研究结果表明，在乌干达的主要作物矿物质浓度的广泛异质性可能是由于土壤特征和其他变量的组合。由于主食构成了乌干达和其他发展中国家膳食矿物质摄入量的很大一部分，这些结果对估计膳食矿物质摄入量和在这些地区制定有效的干预战略具有影响。
Calcium (Ca), iron (Fe), selenium (Se), and zinc (Zn) deficiencies are widespread in sub-Saharan Africa, with severe implications for human health. In Uganda, where the predominant diet depends heavily on plant-based staples, crop mineral concentration is an important component of dietary mineral intake. Studies assessing the risk of nutrient deficiency or the effectiveness of nutrient-focused interventions often estimate dietary mineral intake using food composition tables that are based on crops grown in developed countries. However, little is known about the actual nutritional content of crops grown in Uganda. Here, we document the Ca, Fe, Se, and Zn concentration of staple crops collected from Ugandan household farms. While median mineral concentrations were similar to those reported previously, variation in crop mineral concentration was high, particularly for Fe and Se. An ordinary least squares regression showed that some soil characteristics were correlated with crop mineral concentrations. Of these, soil pH was often positively associated with crop mineral concentration, while sand and organic carbon concentrations were negatively associated with several crop mineral concentrations. However, much of the variation in crop mineral content was not associated with the soil characteristics measured. Overall, our results suggest that extensive heterogeneity in staple crop mineral concentration in Uganda is likely due to a combination of edaphic characteristics and other variables. Because staple foods constitute a large portion of dietary mineral intake in Uganda and other developing countries, these results have implications for estimates of dietary mineral intake and the development of effective intervention strategies in such regions.