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Productivity and profitability of Larix principis-rupprechtii and Pinus tabuliformis plantation forests in Northeast China
Forest Policy and Economics ( IF 4 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.forpol.2020.102314
Zhaochen Li , Jun Xiao , Gang Lu , Weina Sun , Chenggong Ma , Yudong Jin

Abstract This study analyzes the productivity and profitability of Larix principis-rupprechtii and Pinus tabuliformis plantation forests in Northeast China. Three management regimes with different thinning intensities (heavy thinning, light thinning, and control) were considered. It is found that high initial planting densities without thinning cause high mortality and slow growth rates, leading to an unprofitable outcome. Thinning operations increase both diameter and height growth of the retained trees, boosting the merchantable volume of large-diameter trees and thus the profitability and productivity. The optimal rotation ages with heavy thinning of Larix principis-rupprechtii and Pinus tabuliformis plantations are 48 and 49 years, 7–8 years longer than what the current management regulation recommends. But the productivity per ha per year of Larix principis-rupprechtii in the heavy thinning regime doubled to 8.21 m3. For Pinus tabuliformis, the thinning treatments cause the productivity gains to increase from 5.1 to 7.9%. The constraints of government regulation without allowance for thinning to the near-mature stands and increasing the intensity could severely reduce the profitability and productivity.

中文翻译:

东北落叶松和油松人工林的生产力和盈利能力

摘要 本研究分析了东北落叶松和油松人工林的生产力和盈利能力。考虑了具有不同间伐强度(严重间伐、轻度间伐和控制)的三种管理方案。结果表明,不进行间伐的高初始种植密度会导致高死亡率和缓慢的生长速度,从而导致无利可图的结果。间伐作业增加了保留树木的直径和高度增长,提高了大直径树木的可销售量,从而提高了盈利能力和生产力。落叶松和油松人工林严重间伐的最佳轮伐期分别为 48 年和 49 年,比现行管理规定的建议长 7-8 年。但在大量间伐制度下,落叶松每公顷每年的生产力翻了一番,达到 8.21 立方米。对于油松,间伐处理导致生产率提高从 5.1% 增加到 7.9%。政府监管的限制,不允许对接近成熟的林分进行间伐和增加强度,可能会严重降低盈利能力和生产力。
更新日期:2020-12-01
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