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为了制定赣南八角苗木的分级标准,提高八角苗木造林质量,结合造林试验,开展以1~2年生八角苗木的苗高、地径指标为主的分级标准研究。结果表明,1年生苗木合格苗率低,出圃后造林成活率低,不宜出圃;2年生苗木合格苗率85%,造林平均成活率87.5%,均达到质量要求。经聚类分析,得出2年生八角苗木分级标准为Ⅰ级苗:苗高≥65 cm,地径≥0.74 cm;Ⅱ级苗:65 cm>苗高≥45 cm,0.74 cm>地径≥0.43 cm;Ⅲ级苗:苗高<45 cm,地径<0.43 cm。
In order to establish the grading standard of the star anise seedlings of Southern Jiangxi Province and improve the quality of the plantation of the star anise seedlings, the grading standards of the seedling height and diameter index of the star anise seedlings of 1 to 2 years old were developed in combination with the afforestation experiment. The results showed that the qualified rate of 1-year-old seedlings was low, the survival rate after afforestation was low, and should not be out of nursery. The qualified seedling rate of 2-year-old seedlings was 85% and the afforestation average survival rate was 87.5%, all of which met the quality requirements. The cluster analysis showed that the grading standard of 2-year-old star anise seedlings was Grade I seedlings: seedling height ≥ 65 cm and diameter ≥ 0.74 cm; grade Ⅱ seedlings: 65 cm> seedling height ≥ 45 cm and 0.74 cm> diameter ≥ 0.43 cm; Ⅲ grade seedlings: seedling height <45 cm, diameter <0.43 cm.