可持续的粮食安全方法：控制污泥在土地上的应用可将养分循环到农业土壤中，并提高农作物的生产力,Food and Energy Security

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可持续的粮食安全方法：控制污泥在土地上的应用可将养分循环到农业土壤中，并提高农作物的生产力
Food and Energy Security ( IF 4.0 ) Pub Date : 2020-01-23 , DOI: 10.1002/fes3.197
Ebrahem M. Eid ₁ , Saad A.M. Alamri _{1,

2} , Kamal H. Shaltout ₃ , Tarek M. Galal ₄ , Mohamed T. Ahmed ₁ , Eid I. Brima ₅ , Nasser Sewelam ₃

Affiliation

当今世界的粮食安全受到多种威胁的威胁，其中包括世界人口的加速增长，地球资源的枯竭，夸大的环境污染以及可预见的气候变化。作为减少这些威胁的策略，明智的做法是将大量污水污泥（SS）作为生物肥料处理到农业土壤中，这是通过作物将有价值的养分循环到食物链中的一项有价值的实践。当前的研究旨在科学地测试将SS应用于农业土壤而不对环境或健康造成威胁的可行性。为土壤种植的大麦（大麦（Hordeum vulgare））提供了0、10、20、30、40和50 g / kg的不同SS改良剂量L.）植物。我们的结果表明，所有SS改良剂量均改善了收获后的土壤特性并增强了大麦生长，在40 g / kg剂量下获得了最佳结果。在此修正剂量下，有机质（OM）含量增加至6.7％，而对照土壤中为1.4％。对收获后土壤的分析表明，在所有SS修正剂量下，所调查的重金属（Co，Cu，Mo，Ni，Zn，Cd，Cr和Pb）的浓度均在农业土壤的允许范围内除Co.外，所有SS改良率均提高了大麦的生长和产量参数，包括枝条和根长，干重，穗重和单株穗数。高达40 g / kg的修正剂量，收获的植物组织中被调查的HMs浓度在安全范围内，大部分被吸收的HMs都保留在根中。综合这些结果，当前的研究表明，将SS施用到农业土壤上代表了一种生态友好的SS处置程序，可以将大量和微量营养素再循环到食物链中，从而为可持续的粮食安全提供了一种有希望的方法。

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A sustainable food security approach: Controlled land application of sewage sludge recirculates nutrients to agricultural soils and enhances crop productivity

The food security in today's world is endangered by several threats, including accelerated increases in the world's population, depletion of the Earth's resources, exaggerated environmental pollution, and foreseen climatic changes. As a strategy to diminish these threats, the wise disposal of the huge amounts of sewage sludge (SS) to agricultural soils as a bio‐fertilizer represents a worthy practice for recirculating valuable nutrients to food chains via crop plants. The current study was designed to scientifically test the feasibility of SS application to agricultural soils without causing environmental or health threats. Different SS amendment doses of 0, 10, 20, 30, 40, and 50 g/kg were supplied for soil‐grown barley (Hordeum vulgare L.) plants. Our results show that all of the SS amendment doses improved the postharvest soil properties and enhanced barley growth, with the best results obtained at the 40 g/kg dose. At this amendment dose, the organic matter (OM) content increased to 6.7% compared with 1.4% in control soil. Analysis of the postharvest soils showed that the concentrations of the investigated heavy metals (HMs) (Co, Cu, Mo, Ni, Zn, Cd, Cr, and Pb) were within the allowable limits for agricultural soils at all of the SS amendment doses, except for Co. All of the SS amendment rates enhanced barley growth and yield parameters, including shoot and root lengths and dry weights, spike weight and number of spikes per plant. Up to the 40 g/kg amendment dose, the concentrations of the investigated HMs in the harvested plant tissues were within safe limits, with most of the absorbed HMs persisting in roots. Taking these results together, the current study suggests that controlled application of SS to agricultural soils represents an eco‐friendly SS disposal procedure, which can recycle macro‐ and micronutrients to food chains and hence provide a promising approach for sustainable food security.

更新日期：2020-01-23

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