Novel Nutrient Sources For Enhancing Soil Nutrient Recycling in Cropping Systems of the Prairies

增强草原耕作系统土壤养分循环的新营养源

• 批准号: 327688-2012
• 负责人: Schoenau, Jeffrey
• 金额: $ 2.33万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=634224
• 关键词: Novel; Nutrient; Sources; Enhancing; Soil

An important aspect of soil conservation is nutrient recycling. Nutrients that are taken from the soil by plants and animals need to be returned to the soil to maintain productivity and reduce our reliance on new sources of fertilizer nutrient. The expansion of the biofuel-bioenergy industry has led to the increased availability of nutrient containing co-products of these processes that have potential use as fertilizers. The proposed research program will investigate various co-products of bioenergy production and their potential to serve as valuable sources of plant available phosphorus and nitrogen when added to the soil.By-products that require evaluation for their potential impacts include co-products of ethanol production such as stillage, and combustion co-products like ashes and chars (biochars). For example, ashes and chars may be derived from processes like gasification and pyrolysis of woody and crop biomass, and as a means of disposal of crop and animal processing by-products like slaughterhouse wastes. Effects that will be evaluated include nutrient amounts, forms (speciation) and turnover, greenhouse gas production, crop recovery of added nutrient, and crop yield and quality. Use of these co-products as fertilizers provides an effective means for recycling the nutrients contained within. However, the co-products often contain nutrient in complex inorganic and organic forms which vary in solubility and plant availability. The proposed research will closely follow the fate of added nutrient in these co-products in the soil-plant system, under controlled environment conditions and in field trials, using a combination of conventional chemical as well as more novel spectroscopic investigative techniques. The performance of the bioenergy co-products will be compared to conventional commercial fertilizer nutrient sources.

土壤保持的一个重要方面是养分循环利用。植物和动物从土壤中获取的养分需要返回土壤，以维持生产力并减少我们对新肥料养分来源的依赖。生物燃料-生物能源行业的扩张导致这些过程中含有养分的副产品的可用性增加，这些副产品具有潜在的肥料用途。拟议的研究计划将调查生物能源生产的各种副产品，以及它们添加到土壤中后作为植物可用磷和氮的宝贵来源的潜力。需要评估其潜在影响的副产品包括乙醇生产的副产品（例如酒糟）和燃烧副产品（例如灰烬和木炭（生物炭））。例如，灰烬和炭可能源自木质和农作物生物质的气化和热解等过程，并作为处理农作物和动物加工副产品（如屠宰场废物）的手段。将评估的影响包括养分数量、形式（物种形成）和周转、温室气体产生、添加养分的作物回收以及作物产量和质量。使用这些副产品作为肥料提供了回收其中所含养分的有效方法。然而，副产品通常含有复杂的无机和有机形式的营养物质，其溶解度和植物利用率各不相同。拟议的研究将在受控环境条件下和田间试验中，结合传统化学和更新颖的光谱研究技术，密切跟踪土壤-植物系统中这些副产品中添加养分的命运。生物能源副产品的性能将与传统的商业化肥营养源进行比较。