Assessing the effects of resident vegetation as a regenerative soil management strategy on soil carbon storage and soil health in Canadian vineyard soils on Pelee Island

评估常驻植被作为再生土壤管理策略对加拿大皮利岛葡萄园土壤碳储存和土壤健康的影响

• 批准号: 567001-2021
• 负责人: Webb, Elizabeth
• 金额: $ 1.46万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=719167
• 关键词: Assessing; effects; resident; vegetation; regenerative

Intensification of agriculture requires heavy machinery, fertilizers and herbicides which create pollution, soil erosion and green house gases and decrease soil fertility and biodiversity. The planting of cover crops and no-till agriculture are regenerative soil management strategies recently adopted between vine rows in some vineyards. Because healthy soils contain abundant carbon, which increases soil aggregate structure and acts as a repository for nutrients, regenerative strategies often focus on increasing carbon in the soils. Soil carbon storage also counters greenhouse gas emissions and increases soil microbe biodiversity. However, because these techniques can result in short-term decreased yield and improvements to soil health take years to observe, there is resistance among some agriculturalists to adopt these strategies. The manager of the vineyard for Pelee Island Winery was an early proponent of cover cropping in vineyards. Over 20 years ago he planted "resident vegetation" consisting of native perennials in some of their fields. It is assumed that soil carbon increased after introducing the resident vegetation, but the size of the carbon stocks or whether the rate of carbon accumulation has peaked is unknown. Fresh organic matter is initially incorporated into the most labile pool of carbon in the soil and the formation of more resilient soil organic matter can be limited by the addition of fertilizers which enhance microbial mineralization. To evaluate the use of resident vegetation as a mechanism of increasing soil carbon stocks we will use stable isotope techniques to demonstrate that some carbon added to the soil from the resident vegetation becomes associated with minerals where it is protected from microbial decay. The varying duration of the use of resident vegetation (2 to 21 years) in different fields makes the Pelee Island vineyard an ideal natural laboratory to assess 1) the ongoing effects of resident vegetation on carbon capture in the calcareous soils of south-western Ontario and 2) the impact this practice has had on soil health and soil microbial activity - these results are critical to Pelee Island Winery to direct future soil management strategies that affect grape production and for participation in Canada's proposed carbon tax offset system.

农业的强化需要重型机械，肥料和除草剂，从而造成污染，土壤侵蚀和温室气体，并降低土壤的生育能力和生物多样性。覆盖作物的种植和无耕作农业是最近在某些葡萄园中葡萄树之间采用的再生土壤管理策略。由于健康的土壤中含有丰富的碳，这会增加土壤骨料的结构并充当养分的存储库，因此再生策略通常集中于增加土壤中的碳。土壤碳存储还可以抵消温室气体排放，并增加土壤微生物生物多样性。但是，由于这些技术可能导致短期下降的产量和土壤健康的改善需要数年的观察，因此一些农业主义者在采用这些策略的情况下具有抵抗力。 Pelee Island Winery葡萄园的经理是葡萄园中耕作的早期拥护者。 20年前，他种植了“居民植被”，其中一些领域由本地多年生植物组成。假定在引入居民植被后，土壤碳的大小增加，但碳储量的大小或碳积累率是否达到峰值是未知的。最初将新鲜有机物纳入土壤中最不稳定的碳库中，并且可以通过添加肥料来限制更弹性的土壤有机物的形成，从而增强微生物矿化。为了评估使用居民植被作为增加土壤碳储备的机制，我们将使用稳定的同位素技术证明，从居民植被中添加到土壤中的一些碳与矿物质相关，并保护其免受微生物衰减的影响。在不同领域使用居民植被的使用持续时间不同，使贝利岛葡萄园成为评估的理想天然实验室。在加拿大提议的碳税抵消系统中。