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Forests 2015, 6(10), 3665-3682; doi:10.3390/f6103665

Biomass Stock and Carbon Sequestration in a Chronosequence of Pinus massoniana Plantations in the Upper Reaches of the Yangtze River

1
Key Laboratory of Ecological Forestry Engineering in Sichuan Province, Institute of Ecology & Forestry, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, Chengdu 611130, China
2
College of Forestry, Sichuan Agricultural University, Huimin Road 211, Chengdu 611130, China
*
Author to whom correspondence should be addressed.
Academic Editor: Mark E. Harmon
Received: 12 July 2015 / Revised: 28 September 2015 / Accepted: 30 September 2015 / Published: 15 October 2015
(This article belongs to the Collection Forests Carbon Fluxes and Sequestration)
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Abstract

Planted forest plays a significant role in carbon sequestration and climate change mitigation; however, little information has been available on the distribution patterns of carbon pools with stand ages in Pinus massoniana Plantations. We investigated the biomass stock and carbon sequestration across a chronosequence (3-, 5-, 7-, 9-, 12-, 15-, 19-, 29-, 35- and 42-year) of stands with the main objectives: (1) to determine the biomass and carbon stock of the forest ecosystem; and (2) to identify factors influencing their distribution across the age series. Simple random sampling was used for collecting field data in the ten (10) stand ages. Three 20 × 20 m standard plots were laid out in February 2015 across the chronosequence. The diameter at breast height (DBH) and tree height (H) of each tree within each plot were measured using calipers and height indicator. Sub-plots of 2 × 2 m were established in each main plot for collecting soil samples at a 0–30- and 30–60-cm depth. Plantation biomass increased with increasing stand ages, ranging from 0.84 tonnes per hectare (t·ha−1) in the three-year stand to 252.35 t·ha−1 in the 42-year stand. The aboveground biomass (AGB) contributed 86.51%; the maximum value is 300-times the minimum value. Carbon concentrations and storage in mineral soil decreased with increasing soil depth, but were controlled by the management history of the ecosystem. The total ecosystem carbon storage varies with stand ages, ranging from 169.90 t·ha−1 in the five-year plantation to 326.46 t·ha−1 in the 42-year plantation, of which 80.29% comes from the mineral soil carbon and 19.71% from the vegetation. The ratio of the total carbon sequestration by the 42-year to the three-year stand was 1.70, implying substantial amounts of carbon accumulation during the transition period from young to mature-aged trees. The forest ecosystem had the capacity of storing up to 263.16 t·ha−1 carbon, assisting in mitigating climate change by sequestrating 965.83 t·ha−1 of CO2 equivalents, indicating that the forest is an important carbon sink. View Full-Text
Keywords: Pinus massoniana; stand age; aboveground biomass; carbon sequestration; subtropical sub-humid forest Pinus massoniana; stand age; aboveground biomass; carbon sequestration; subtropical sub-humid forest
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Justine, M.F.; Yang, W.; Wu, F.; Tan, B.; Khan, M.N.; Zhao, Y. Biomass Stock and Carbon Sequestration in a Chronosequence of Pinus massoniana Plantations in the Upper Reaches of the Yangtze River. Forests 2015, 6, 3665-3682.

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