Early Growth Performance of Excellent Acacia melanoxylon Clones in Meizhou Regional Trial
In order to identify superior clones of Acacia melanoxylon suitable for cultivation in the Meizhou region,this study focused on 9 clones of A.melanoxylon,including SR3,SR14,SR17,SR20,SR21,SR53,SF1 and MZ1.The study measured their diameter at breast height(DBH),tree height,and crown width within two years after afforestation.Additionally,the study examined the growth performance during af-forestation and tending processes by separately applying large granule compound fertilizer and complex mixed fer-tilizer to the SR3 clone.The results indicated that the DBH,tree height,and crown width of all A.melanoxy-lon clones showed significant improvement(P＜0.01)after 1.6a of afforestation,and there were significant differences in DBH,tree height,and crown width among different clones of A.melanoxylon(P＜0.01),with SR17 exhibiting the fastest annual growth rate.The early growth performance of SR17 and SR14 was notably better than that of other clones.The growth performance of A.melanoxylon young forests was better after the application of large granule compound fertilizer than after the application of complex mixed fertilizer.Based on early growth performance,SR17 and SR14 exhibit fast growth rates and strong adaptability,making them suit-able for widespread cultivation in the eastern region of Guangdong.The application of large granule compound fertilizer during afforestation processes proves to be more efficient.
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