Dynamic simulation of management events for assessing impacts of climate change on pre-alpine grassland productivity

作者：Krischan Petersen, David Kraus, Pierluigi Calanca, Mikhail A. Semenov, Klaus Butterbach‐Bahl, Ralf Kiese · 发表于：European Journal of Agronomy · 年份：2021 · DOI：10.1016/j.eja.2021.126306 · 被引用次数：35 · 研究领域：Plant Water Relations and Carbon Dynamics、Horticultural and Viticultural Research、Ecology and Vegetation Dynamics Studies

The productivity of permanent temperate cut grasslands is mainly driven by weather, soil characteristics, botanical composition and management. To adapt management to climate change, adjusting the cutting dates to reflect earlier onset of growth and expansion of the vegetation period is particularly important. Simulations of cut grassland productivity under climate change scenarios demands management settings to be dynamically derived from actual plant development rather than using static values derived from current management operations. This is even more important in the alpine region, where the predicted temperature increase is twice as high as compared to the global or Northern Hemispheric average. For this purpose, we developed a dynamic management module that provides timing of cutting and manuring events when running the biogeochemical model LandscapeDNDC. We derived the dynamic management rules from long-term harvest measurements and monitoring data collected at pre-alpine grassland sites located in S-Germany and belonging to the TERENO monitoring network. We applied the management module for simulations of two grassland sites covering the period 2011–2100 and driven by scenarios that reflect the two representative concentration pathways (RCP) 4.5 and 8.5 and evaluated yield developments of different management regimes. The management module was able to represent timing of current management operations in high agreement with several years of field observations (r² > 0...