Uncovering the contribution of cover crop belowground inputs on soil carbon and nitrogen storage
揭示覆盖作物地下投入对土壤碳和氮储存的贡献
基本信息
- 批准号:RGPIN-2017-04439
- 负责人:
- 金额:$ 1.97万
- 依托单位:
- 依托单位国家:加拿大
- 项目类别:Discovery Grants Program - Individual
- 财政年份:2020
- 资助国家:加拿大
- 起止时间:2020-01-01 至 2021-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Increasing biodiversity and maintaining healthy soil are critical to enhancing Canadian food systems, for which cover crops may play an important role. Cover crops are plants grown in-between main crops (eg corn, soybeans, tomatoes), providing soil protection and enrichment during the fall to following spring when fields would normally be left bare. The majority of cover crop research focuses on the cover crop growing season and the following year, but growers who use cover crops do so over the long term. Moreover, changes in soil indicators, such as those affecting C and N dynamics occur over the long-term. Thus there is a significant gap in knowledge the true impact of cover crops in agroecosystems.
My research program is well positioned to advance knowledge in the understanding the role of cover crops on C and N cycling to evaluate ecological services (e.g. reduced synthetic fertilizer dependency) while quantifying crop productivity and resiliency by using my remarkable suite of long-term cover crop experiments. Through these one-of-a-kind in Canada long-term cover crop experiments we have observed differences in soil organic matter that cannot be explained by aboveground plant inputs alone. The mechanisms driving soil organic matter increases due to cover cropping are a significant gap in knowledge and the focus of this NSERC proposal.
The short term objectives of my research program and this DG proposal are to improve scientific understanding of the mechanisms of plant above- and below-ground inputs on soil organic C and N stores. It is hypothesized that belowground inputs (roots and rhizodeposits) are contributing significant and relatively stable quantities of organic matter, which in turn facilitates C and N protection allowing for overall long-term gains in organic C with cover crops compared to the no cover crop control. Through this NSERC DG, my research program will address a significant knowledge gap of the relative contribution of, and controlling factors of, the two plant below ground inputs of importance, namely root exudates (which constitute up to 20% of plant-fixed C) and root tissues. The proposed agricultural systems-based approach is innovative as it assesses (i) soil in addition to (ii) plants, (iii) the environment, and (iv) the interconnections among these pools throughout the continuum in a long-term cover crop experiment. Novel field and laboratory experiments will be conducted through the training and mentorship of 4 graduate HQP. The proposed research has important implications for advancing competitiveness of Canadian agriculture while providing environmental benefits and soil ecosystem services. Most notably, my research program targets understanding belowground plant inputs on C and N dynamics which addresses a significant gap in scientific knowledge.
增加生物多样性和保持健康的土壤是加强加拿大粮食系统的关键,覆盖作物可能发挥重要作用。覆盖作物是在主要作物(如玉米,大豆,西红柿)之间种植的植物,在秋季到次年春季田地通常裸露时提供土壤保护和富集。大多数覆盖作物的研究集中在覆盖作物的生长季节和下一年,但种植者谁使用覆盖作物这样做是长期的。此外,土壤指标的变化,如那些影响碳和氮动态发生在长期。因此,在了解覆盖作物对农业生态系统的真正影响方面存在着重大差距.
我的研究计划是很好的定位,以推进知识的理解覆盖作物对C和N循环的作用,以评估生态服务(例如,减少合成肥料的依赖),同时量化作物生产力和弹性通过使用我的显着套件长期覆盖作物实验。 通过这些独一无二的加拿大长期覆盖作物实验,我们观察到土壤有机质的差异,不能单独用地上植物投入来解释。由于覆盖种植,驱动土壤有机质增加的机制是知识上的一个重大空白,也是NSERC建议的重点。
我的研究计划的短期目标和本DG建议是提高植物地上和地下输入对土壤有机C和N商店的机制的科学认识。据推测,地下输入(根和根沉积物)是贡献显着的和相对稳定的数量的有机质,这反过来又有利于C和N的保护,允许整体长期收益的有机C与覆盖作物相比,没有覆盖作物控制。通过这个NSERC DG,我的研究计划将解决一个显着的知识差距的相对贡献,和控制因素,两个植物地下输入的重要性,即根分泌物(其中构成高达20%的植物固定C)和根组织。拟议的农业系统为基础的方法是创新的,因为它评估(一)土壤除了(二)植物,(三)环境,(四)这些池之间的相互联系,在整个连续的长期覆盖作物实验。新的实地和实验室实验将通过培训和指导4名研究生HQP进行。这项研究对提高加拿大农业的竞争力,同时提供环境效益和土壤生态系统服务具有重要意义。最值得注意的是,我的研究计划的目标是了解地下植物输入的C和N动态,解决了科学知识的显着差距。
项目成果
期刊论文数量(0)
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VanEerd, Laura其他文献
VanEerd, Laura的其他文献
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{{ truncateString('VanEerd, Laura', 18)}}的其他基金
Uncovering the contribution of cover crop belowground inputs on soil carbon and nitrogen storage
揭示覆盖作物地下投入对土壤碳和氮储存的贡献
- 批准号:
RGPIN-2017-04439 - 财政年份:2022
- 资助金额:
$ 1.97万 - 项目类别:
Discovery Grants Program - Individual
Uncovering the contribution of cover crop belowground inputs on soil carbon and nitrogen storage
揭示覆盖作物地下投入对土壤碳和氮储存的贡献
- 批准号:
RGPIN-2017-04439 - 财政年份:2021
- 资助金额:
$ 1.97万 - 项目类别:
Discovery Grants Program - Individual
Uncovering the contribution of cover crop belowground inputs on soil carbon and nitrogen storage
揭示覆盖作物地下投入对土壤碳和氮储存的贡献
- 批准号:
RGPIN-2017-04439 - 财政年份:2019
- 资助金额:
$ 1.97万 - 项目类别:
Discovery Grants Program - Individual
Uncovering the contribution of cover crop belowground inputs on soil carbon and nitrogen storage
揭示覆盖作物地下投入对土壤碳和氮储存的贡献
- 批准号:
RGPIN-2017-04439 - 财政年份:2018
- 资助金额:
$ 1.97万 - 项目类别:
Discovery Grants Program - Individual
Uncovering the contribution of cover crop belowground inputs on soil carbon and nitrogen storage
揭示覆盖作物地下投入对土壤碳和氮储存的贡献
- 批准号:
RGPIN-2017-04439 - 财政年份:2017
- 资助金额:
$ 1.97万 - 项目类别:
Discovery Grants Program - Individual
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RGPIN-2016-05273 - 财政年份:2019
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Uncovering the contribution of cover crop belowground inputs on soil carbon and nitrogen storage
揭示覆盖作物地下投入对土壤碳和氮储存的贡献
- 批准号:
RGPIN-2017-04439 - 财政年份:2018
- 资助金额:
$ 1.97万 - 项目类别:
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阐明有机耕作系统中覆盖作物根系对土壤肥力和作物营养的作用和贡献
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RGPIN-2016-05273 - 财政年份:2017
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Discovery Grants Program - Individual