Evaluating efficacy of organo-mineral fertilisers to improve soil health and grain quality

评估有机矿物肥料改善土壤健康和谷物质量的功效

• 批准号: 2749497
• 金额: --
• 依托单位: CRANFIELD UNIVERSITY
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2749497
• 关键词: Evaluating; efficacy; organo; mineral; fertilisers

Agriculture is responsible for 9% of all UK GHG emissions and 24% of global emissions; over 50% of these emissions are due to the manufacture and use of nitrogen (N) based fertilisers. The manufacturing of mineral fertilisers is energy intensive and its repeated use also leads to decline in soil organic matter. One option is to utilise organic waste material and a reduced amount of mineral fertilisers, collectively known as organo-mineral fertilisers (OMF). OMFs can not only reduce the demand for mineral fertilisers but also contribute to soil health. However, what is not known is the residence time of thecarbonaceous component of the OMF when mixed with soil. As the terrestrial ecosystem has two to three times more carbon in it than the atmosphere, how soil carbon is managed to ensure it is sequestered is pertinent.The proposed DTP project will utilise the field sites identified by Yara and focus on the mechanisms of how carbon storage in soil promotes nutrient mineralisation to encourage uptake by crops to improve grain quality. Phosphorus taken up by cropswill be stored in grains as phytate but binds strongly to Fe and Zn which are key micronutrients needed for human health causing a challenge to ensure grain quality meets nutritional needs of population.Aim: To elucidate the role of soil carbon sequestered from OMF in influencing mineralisation of phosphorus to improve grain qualityHypotheses:1. Key elements present in OMF such as carbon and phosphorus will interact with heavy metals such as Cu and Zn in soil influencing its availability to crops2. Slow release of phosphorus uptake by crops will be stored as phytate and not influence strong binding with Fe and Zn affecting grain quality.Objectives:1. To assess efficacy of OMF to meet crop nutrient demand and sequester carbon in soil2. To elucidate mineralisation patterns of key elements present in OMF and its availability when in soil at early stages of crop development3. To evaluate root and shoot response to soil carbon build-up and phosphorus mineralisation during key crop growth stages4. To evaluate suitability of wheat and barley varieties to store phytate and influence grain quality

农业占英国温室气体排放量的9%，占全球排放量的24%;其中超过50%的排放是由于生产和使用氮基肥料。矿物肥料的生产是能源密集型的，其重复使用也导致土壤有机质的下降。一种选择是利用有机废料和减少量的矿物肥料，统称为有机矿物肥料（OMF）。有机肥料不仅可以减少对矿物肥料的需求，还有助于土壤健康。然而，什么是不知道的是，当与土壤混合时，OMF的碳组分的停留时间。由于陆地生态系统中的碳含量是大气中的两到三倍，因此如何管理土壤碳以确保其被封存是至关重要的。拟议的DTP项目将利用Yara确定的实地地点，重点研究土壤中碳储存如何促进养分矿化，以鼓励作物吸收，从而改善谷物品质的机制。作物吸收的磷将以植酸盐的形式储存在谷物中，但与人类健康所需的关键微量营养素Fe和Zn强烈结合，这对确保谷物品质满足人口营养需求提出了挑战。OMF中存在的关键元素如碳和磷会与土壤中的重金属如铜和锌相互作用，影响其对作物的有效性2。作物吸收磷后缓慢释放，以植酸盐的形式储存，不影响与铁、锌的强结合，影响籽粒品质。评估有机肥料满足作物养分需求和固碳土壤的功效2。阐明OMF中主要元素的矿化模式及其在作物发育早期土壤中的有效性3。评估作物生长关键阶段根系和地上部对土壤碳积累和磷矿化的反应4。评价小麦和大麦品种贮存植酸盐的适宜性及其对籽粒品质的影响