Effect of Land Use on Soil Carbon Stock at Huai-Hin-Dat Subwatershed in Rayong Province
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Abstract
The changes in land use from natural forest to agricultural area has result in more carbon dioxide (CO2) being released into atmosphere, which has been indicated as an important cause of global warming. Land use planning and management for enhance efficiency in carbon sequestration in both forms of biomass and soil carbon stocks are of increased interest dut\ring the present time. The study of soil carbon stock in various land use types at Huai-Hin-Dat subwatershed, Rayong province was undertaken to determine the soil carbon stocks at the study site. This site consisted of para rubber (PR), abandoned para rubber (APR), forest restoration with teak (FRT) and secondary dry evergreen forest (SDEF). The study also focused on the relationship between soil organic carbon and some soil properties. The results showed that the average soil organic carbon (SOC) under all land use was highest in the upper topsoil (0-10 cm.) and decrease with soil depth. The total soil carbon stock had the maximum value in SDEF (128.17 tC ha-1) followed by FRT (86.17 tC ha-1), APR (79.36 tC ha-1) and PR (48.42 tC ha-1) respectively. Additionally, the SOC at upper topsoil (0-10 cm.) of all land use areas were highest in December and lowest in June whereas SOC at lower topsoil (10-30 cm.) and subsoil (30-50 cm.) during each month was variable in all land use areas. Comparison on SOC among the various land use types and soil depths was highly significant at probability < 0.01. Furthermore, the relationship between SOC and various soil properties indicated that soil moisture content was positively correlated with SOC while soil bulk density showed negative correlation.
Article Details
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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