The biogeochemical model, PnET-BGC, was modified and parameterized using field data from an experimental whole-tree harvest of watershed (W5) in 1983–1984 at the Hubbard Brook Experimental Forest (HBEF), New Hampshire, USA. The model simulated the hydrology, biomass accumulation, and soil solution and stream water chemistry responses to forest cutting. The parameterized model was then applied to other experimentally cut watersheds at the HBEF; including a devegetation experiment (W2; devegetation and herbicide treatment) and a commercial strip-cut (W4) to evaluate the ability of the model to depict ecosystem responses to a range of cutting regimes. Revisions of algorithms of PnET-BGC improved model performance in predicting short- and long-term dynamics of major elements following various approaches to forest cutting. Despite some initial differences in species composition and biomass accumulation rates among the cut watersheds, simulations of total forest biomass for all three treated watersheds (W2, W4 and W5) were consistent with expectations based on the growth trajectory of a second-growth, reference watershed (W6) at the HBEF. The modified two-soil-layer PnET-BGC captured the immediate increase in stream concentrations of NO₃⁻, Ca²⁺, Mg²⁺ and Na⁺ as well as enhanced adsorption of SO₄²⁻ following cuttings and indicated a greater response for the devegetation and the whole-tree harvest treatments than the sequential strip-cut of W4. Simulations indicated intense NO₃⁻ leaching with the devegetation and herbicide treatment and consequent accelerated decline in soil base saturation and a slower recovery pattern during forest regrowth by the end of the simulation period (2100) compared to the other treatments.

生物地球化学模型 PnET-BGC 使用 1983-1984 年在美国新罕布什尔州哈伯德布鲁克实验森林 (HBEF) 的流域 (W5) 实验全树收获的现场数据进行了修改和参数化。该模型模拟了水文、生物量积累以及土壤溶液和溪流水化学对森林砍伐的响应。然后将参数化模型应用于 HBEF 的其他实验性切割流域；包括植被去除实验（W2；植被去除和除草剂处理）和商业条形切割（W4），以评估模型描述生态系统对一系列切割方式的反应的能力。PnET-BGC 算法的修订提高了模型在预测各种森林砍伐方法后主要元素的短期和长期动态方面的性能。尽管砍伐流域的物种组成和生物量积累率存在一些初始差异，但所有三个处理流域（W2、W4 和 W5）的森林总生物量模拟与基于第二次生长、参考流域的生长轨迹的预期一致(W6) 在 HBEF。改良的两层土壤 PnET-BGC 捕获了 NO 流浓度的立即增加₃ ^-、Ca ²⁺、Mg ²⁺和Na ⁺以及插条后对SO ₄ ^{2- 的}吸附增强，表明与W4 的连续条带切割相比，植被去除和整棵树收获处理的响应更大。模拟表明，与其他处理相比，在模拟期结束时（2100 年），在植被恢复和除草剂处理过程中，NO ₃ ^{- 会发生}强烈的浸出，从而导致土壤基础饱和度加速下降，并且在森林再生过程中恢复模式较慢。