There is a significant knowledge gap in the area of management of the vast shelterbelt network currently existing on agricultural lands in Canada and across the world. Throughout eight decades of shelterbelt planting in Saskatchewan, Canada, there are no available records of shelterbelt management practices used by land managers, such as herbicides (H), fertilizers (F), irrigation (I), or tillage (T) applications, collectively referred to as HFIT management. The main objective of this large-scale study was to quantify the effects of HFIT management on shelterbelt carbon sequestration for six common tree and shrub species. Field data from 303 randomly selected shelterbelts across millions of hectares of agricultural land in three soil zones were combined with existing shelterbelt carbon stock curves for Saskatchewan, produced by a shelterbelt carbon management support tool, Belt-CaT, to estimate site-specific total ecosystem carbon (TEC) stocks. Estimated TEC stocks and annual rates for HFIT sites were compared to the no management sites used as a reference. HFIT management increased carbon stocks for the majority of species, four of six, resulting in higher TEC at any tree spacing, mostly at higher suitability sites. However, HFIT management effects were not consistent across individual species, land suitability, or planting designs. The top three HFIT management combinations for hybrid poplar were IT, HIT, and HI, for white spruce they were FT, IT, and FIT, and only FT benefited caragana shelterbelts. The lack of management practices makes unmanaged shelterbelts more unpredictable and unreliable, in terms of tree growth and carbon stocks sequestration potential.

目前在加拿大和世界各地的农业用地上存在的庞大防护林网络的管理领域存在巨大的知识差距。在加拿大萨斯喀彻温省八年的防护林种植过程中，没有可用的土地管理人员使用的防护林管理实践记录，例如除草剂 (H)、肥料 (F)、灌溉 (I) 或耕作 (T) 应用，统称简称HFIT管理。这项大规模研究的主要目的是量化 HFIT 管理对六种常见乔木和灌木物种的防护林碳封存的影响。来自三个土壤区数百万公顷农田中随机选择的 303 个防护林的现场数据与萨斯喀彻温省现有的防护林碳库曲线相结合，由防护林碳管理支持工具 Belt-CaT 生成，用于估算特定地点的总生态系统碳 (TEC) 储量。将 HFIT 站点的估计 TEC 存量和年率与用作参考的无管理站点进行比较。HFIT 管理增加了大多数物种的碳储量，六个物种中有四个，导致任何树间距下的 TEC 更高，主要是在更适宜的地点。然而，HFIT 管理效果在单个物种、土地适宜性或种植设计之间并不一致。混合杨树的 HFIT 管理组合前三名是 IT、HIT 和 HI，对于白云杉，它们是 FT、IT 和 FIT，只有 FT 使锦鸡儿防护林受益。管理实践的缺乏使未管理的防护林变得更加不可预测和不可靠，