Clonal Variations of Acacia auriculiformis A. Cunn. ex Benth. Hybrid at Silvicultural Research Center 6 (Nakhon Ratchasima)
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Abstract
Genetic improvement of Acacia auriculiformis A. Cunn. ex Benth. hybrids have enhanced their growth potential and adaptability to planting sites. However, differences in stem characteristics, yield and growth are evident. Consequently, this study examined the variation in 23 clones of a 5-year-old A. auriculiformis hybrid that had been planted at Silvicultural Research Center 6 (Nakhon Ratchasima) in terms of their growth, biomass and fresh weight, stem volume and carbon storage. The clonal test involved plots in a randomized complete block design with four replications. The diameter at breast height and total height of all trees were measured; subsequently, allometric equations were developed to estimate the biomass, carbon storage and stem fresh weight and volume of the trees.
Based on the results, there were highly significant differences (p<0.01) for all variables examined among the 23 clones. The RFD 3-2 clone, which was registered as a new plant variety, produced the highest total biomass and carbon stored in biomass, with mean values of 99.03 and 47.20 t/ha, respectively. Furthermore, the stem fresh weight and volume of this clone were the highest, with mean values of 102.12 t/ha and 130.02 m3/ha, respectively, due to its straight stem and lack of forking at a low level. In addition, clones No. 12 and 13 were superior in terms of growth, biomass, stem fresh weight and stem volume, with values that were comparable to those of the RFD 3-2 clone. The findings suggested that these A. auriculiformis hybrid clones were suitable for reforestation and commercial plantations in Nakhon Ratchasima province and other regions with similar site conditions.
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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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