Soil macronutrient cycles beneath our feet: predicting how soil carbon and nitrogen manipulation regulates phosphorus cycling for environmental benefi

我们脚下的土壤常量养分循环：预测土壤碳和氮的操纵如何调节磷循环以实现环境效益

• 批准号: 1946135
• 金额: --
• 依托单位: Lancaster University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1946135
• 关键词: Soil; macronutrient; cycles; beneath; our

Managing soil phosphorus is a major global issue, both with requirements for maximising P uptake into crops (ie minimising fertiliser resource input needs) and for reducing losses to waters. Both issues are united by controls of P turnover in soils, in turn influenced by coupled C, N and P cycles. These are often studied spatially, but without understanding temporally how we can manipulate these interacting cycles over time through management. Tackling this truly requires integrated biogeochemical knowledge and problem solving, necessitating training scientists capable of upscaling combined knowledge of soil, chemistry, biology and landscape processes into management advice. Recent BBSRC-funded work from the supervisors has shown controls of soil sorption, C and P status properties on soil solid-phase P forms and availability, spatially. The PhD research training opportunity here is to answer how these soil C, N, P processes can be beneficially manipulated to improve P efficiencies with respect to greater P availability and uptake of crop available P forms, yet minimising these forms from leaching.Microbial C, N and P cycling (and timescales of response to change) differ across soil types. The impacts of changing cycles on soil-solution P speciation couples P research needs with important agronomic management and societal goals of improving soil quality (e.g. increasing organic matter status of farmed soils). This studentship provides a training platform for the student to develop new knowledge, then a conceptual model leading to predictive ability, using manipulations and soil sensors, to understand timescales of improved soil P functions associated with microbial and soil organic matter quality changes. Specifically the PhD training will address the challenges of upscaling soil observations (including novel in-situ sensor data) to improve spatio-temporal prediction.

土壤磷管理是一个重要的全球性问题，既要求作物吸收磷最大化（即最小化肥料资源投入需求），又要求减少沃茨损失。这两个问题是统一的控制土壤中的磷周转，反过来又影响耦合C，N和P循环。这些通常是空间上的研究，但没有理解时间，我们如何可以操纵这些相互作用的周期随着时间的推移，通过管理。解决这一问题确实需要综合地球化学知识和解决问题的能力，有必要培训能够将土壤，化学，生物学和景观过程的综合知识提升为管理建议的科学家。最近BBSRC资助的工作，从监管机构已经显示控制土壤吸附，C和P状态属性对土壤固相P的形式和可用性，空间。博士研究培训机会在这里是回答这些土壤C，N，P过程可以被有益地操纵，以提高磷效率方面更大的磷的可用性和作物有效磷的吸收形式，但最大限度地减少这些形式从leaching.Microbial C，N和P循环（和响应变化的时间尺度）不同的土壤类型。土壤溶液磷形态的变化周期的影响夫妇P的研究需要与重要的农艺管理和社会目标，提高土壤质量（如增加有机质的农田土壤）。该奖学金为学生提供了一个培训平台，以开发新的知识，然后是一个概念模型，导致预测能力，使用操作和土壤传感器，以了解与微生物和土壤有机质质量变化相关的改善土壤磷功能的时间尺度。具体而言，博士培训将解决扩大土壤观测（包括新的原位传感器数据）的挑战，以改善时空预测。