Soil Fertility and Estimation of Carbon Sequestration in Forest Restoration at age 8 years in Phrae Province
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Abstract
The soil properties and carbon sequestration were assessed in forest restoration aged 8 years in Ban Boon Jam, Nam Lao sub-district, Rong Kwang district, Phrae province, Thailand. The relationship was studied between soil factors and the appearance of varieties of plant. Data were collected from the topsoil at a depth of 0–5 cm and from the subsoil at a depth of 20–25 cm in restored forest, remnant forest, and agricultural areas. Soil samples were collected from 3 sites in each area based on a plot size of 40x40 m. Components of types of plant were collected from 5 plots in the forest restoration and from 3 plots in the remnant forest to assess carbon sequestration in plants in the areas.
The study results revealed that the surface soil pH in the remnant forest was neutral (6.77). The cation exchange capacity in the remnant forest was the highest (12.5 milliequivalents/100 g) and the organic matter contents in the remnant forest and restored forest were higher than in the agricultural area (6.65, 5.47, and 5.02%, respectively). Macronutrients and micronutrients in the remnant forest were highest. The chemical properties of the subsurface soil and surface soil were not much different; specifically, there were no significant differences in the physical soil properties at the 95% level. The assessment in the restored forest indicated there were 216.45 t/ha of biomass that sequestered 101.72 t/ha of carbon. The remnant forest had 406.78 t/ha of biomass, with an associated carbon sequestration of 191.17 t/ha. Compared to other areas, the amount of carbon sequestered depended on the number and size of trees. In addition, the soil in the restored forest tended to be more fertile. The data obtained could be used in guidelines for managing reforested areas and on the appropriate use of these areas to increase carbon sequestration efficiency in the future.
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ข้าพเจ้าและผู้เขียนร่วม (ถ้ามี) ขอรับรองว่า ต้นฉบับที่เสนอมานี้ยังไม่เคยได้รับการตีพิมพ์และไม่ได้อยู่ในระหว่างกระบวนการพิจารณาตีพิมพ์ลงในวารสารหรือสิ่งตีพิมพ์อื่นใด ข้าพเจ้าและผู้เขียนร่วม (ถ้ามี) ยอมรับหลักเกณฑ์และเงื่อนไขการพิจารณาต้นฉบับ ทั้งยินยอมให้กองบรรณาธิการมีสิทธิ์พิจารณาและตรวจแก้ต้นฉบับได้ตามที่เห็นสมควร พร้อมนี้ขอมอบลิขสิทธิ์ผลงานที่ได้รับการตีพิมพ์ให้แก่วารสารวนศาสตร์ คณะวนศาสตร์ มหาวิทยาลัยเกษตรศาสตร์ กรณีมีการฟ้องร้องเรื่องการละเมิดลิขสิทธิ์เกี่ยวกับภาพ กราฟ ข้อความส่วนใดส่วนหนึ่ง หรือ ข้อคิดเห็นที่ปรากฏในผลงาน ให้เป็นความรับผิดชอบของข้าพเจ้าและผู้เขียนร่วม (ถ้ามี) แต่เพียงฝ่ายเดียว และหากข้าพเจ้าและผู้เขียนร่วม (ถ้ามี) ประสงค์ถอนบทความในระหว่างกระบวนการพิจารณาของทางวารสาร ข้าพเจ้าและผู้เขียนร่วม (ถ้ามี) ยินดีรับผิดชอบค่าใช้จ่ายทั้งหมดที่เกิดขึ้นในกระบวนการพิจารณาบทความนั้น”
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