Improving Zn bioavailability in lentil through fertilization

加拿大是世界上最大的小扁豆（透镜culinaris）生产国和出口国，萨斯喀彻温省是主要的小扁豆生产省。 加拿大小扁豆出口的一个大市场存在于发展中国家，在这些国家，由于日常饮食严重依赖营养缺乏的谷物和豆类谷物，缺锌是人类健康问题的主要原因。 并不是所有的锌在粮食是可用于人类，由于结合的抗营养素，如植酸锌形成不溶性复合物，不能被人体吸收。豆类作物如小扁豆与锌施肥可以增加产量和锌的浓度在粮食和潜在的改善粮食的人类营养品质，并增加加拿大小扁豆的市场需求。 然而，这在多大程度上增加了“生物可利用”锌是未知的。由于磷是植酸抗营养素的主要成分，锌和磷肥都可能影响扁豆作为人类营养中锌的生物强化来源的质量。 植酸盐与锌的摩尔比已被用于对食物中锌的生物利用度进行分类，并且已开发模型来预测锌的吸收。扁豆中锌的估计，其生物有效性和作物和土壤管理因素，如扁豆类，锌施肥的做法，和其他营养物质，如磷的关系，建议在萨斯喀彻温省土壤的范围内进行调查。 具体而言，拟议的研究探讨了土壤和叶面施用锌肥对三种不同类型的扁豆锌浓度和植酸含量的影响。锌吸收的三变量模型将用于估计扁豆粒中锌的生物利用度。 再动员和分配的小扁豆植物作为功能的小扁豆类类型，锌施肥实践也将进行评估。

Canada is the largest producer and exporter of lentil (Lens culinaris) in the world, and Saskatchewan is the leading lentil producing province. A large market for Canadian lentil exports exists in developing countries where zinc (Zn) deficiencies are a leading cause of human health problems due to heavy reliance on nutrient deficient cereals and grain legumes in the daily diet. Not all of the Zn in grain is available to humans, due to binding of anti-nutrients like phytate to Zn to form insoluble complexes that cannot be absorbed by the human body. Fertilization of pulse crops like lentil with Zn can increase the yield and concentration of Zn in the grain and potentially improve the human nutritional qualities of the grain, and increase the market demand for Canadian lentils. However, the extent to which this increases "bioavailable" Zn is unknown. As phosphorus is a major component of the phytate anti-nutrient, both zinc and phosphorus fertilization may affect the quality of lentil as a biofortified source of Zn in human nutrition. The phytate to zinc molar ratio has been used to categorize the zinc bioavailability in food, and models have been developed to predict Zn absorption. Estimation of Zn in lentils, its bioavailabity and relationship to crop and soil management factors such as lentil class, Zn fertilization practices, and other nutrients such as phosphorus are proposed to be investigated in a range of Saskatchewan soils. Specifically, the proposed research examines the effect of soil and foliar applied Zn fertilizers on zinc concentration and phytate content of three different classes of lentil. A trivariate model of Zn absorption will be used to estimate Zn bioavailability in the lentil grain. Re-mobilization and distribution of Zn with the lentil plant as a function of lentil class type, and Zn fertilization practice will also be evaluated.