Regional Assessment of Carbon Pool Response to Intensive Silvicultural Practices in Loblolly Pine Plantations
نویسندگان
چکیده
Tree plantations represent an important component of the global carbon (C) cycle and are expected to increase in prevalence during 21st century. We examined how silvicultural approaches that optimize economic returns loblolly pine (Pinus taeda L.) affected accumulation C pools vegetation, detritus, mineral soil up 100 cm across pine’s natural range southeastern United States. Comparisons treatments included competing vegetation or ‘weed’ control, fertilization, thinning, varying intensities treatment for 106 experimental 322 plots. The average age sampled was 17 years, stored (pine understory) averaged 82.1 ± 3.0 (±std. error) Mg ha?1, 14.3 0.6 ha?1 detrital (soil organic layers, coarse-woody debris, detritus). Mineral (0–100 cm) 79.8 4.6 sites. For management effects, thinning reduced by 35.5 1.2 all combinations. Weed control fertilization increased between 2.3 5.7 combinations, with high intensity applications producing greater than low (increase 21.4 1.7 ha?1). Detrital were negatively where either weed also applied, intensity. did not respond any treatments. From these data, we constructed regression models summarized detritus + response independent variables commonly monitored plantation managers (site index (SI), trees per hectare (TPH) (AGE)). on AGE both SI TPH. model explained less variance (adj. R2 = 0.29) 0.87). A general recommendation looking maximize storage would be maintain a TPH SI, manipulation having relative effect. model, predict managed achieve upper third (26.8) within our observations, planted at 1500 TPH, could accumulate ~85 12 years amount region’s pool. Notably, can using genetic silviculture technologies.
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ژورنال
عنوان ژورنال: Forests
سال: 2021
ISSN: ['1999-4907']
DOI: https://doi.org/10.3390/f13010036