Comprehensive evaluation of factors influencing selenium fertilization biofortification

作者：Ruilin Huang, Gary S. Bañuelos, Jianrong Zhao, Zhangmin Wang, Muhammad Raza Farooq, Yang Yuling, Jiaping Song, Zezhou Zhang, Youtao Chen, Xuebin Yin, Lidong Shen · 发表于：Journal of the Science of Food and Agriculture · 年份：2024 · DOI：10.1002/jsfa.13442 · 被引用次数：13 · 研究领域：Selenium in Biological Systems、Mercury impact and mitigation studies、Heavy Metal Exposure and Toxicity

Abstract BACKGROUND Dietary selenium (Se) deficiency, stemming from low Se concentrations in agricultural products, threatens human health. While Se‐containing fertilizers can enhance the Se content in crops, the key factors governing Se biofortification with Se fertilization remain unclear. RESULTS This study constructed a global meta‐analysis dataset based on field experiments comprising 364 entries on Se content in agricultural products and 271 entries on their yield. Random forest models and mixed effects meta‐analyses revealed that plant types (i.e., cereals, vegetables, legumes, and forages) primarily influenced Se biofortification, with Se fertilization rates being the next significant factor. The random forest model, which included variables like plant types, Se fertilization rates, methods and types of Se application, initial soil conditions (including Se content, organic carbon content, and pH), soil types, mean annual precipitation, and temperature, explained 82.14% of the variation in Se content and 48.42% of the yield variation in agricultural products. For the same agricultural products, the increase in Se content decreased with higher rates of Se fertilization. The increase in Se content in their edible parts will be negligible for cereals, forages, legumes, and vegetable crops, when Se fertilization rates were 164, 103, 144, and 147 g Se ha −1 , respectively. Conversely, while low Se fertilization rates enhanced yields, high rates led to a yield reduction, par...