【摘要】 为阐明简约培育模式下良种杉木Cunninghamia lanceolata林质量特征、影响因子及可持续经营策略,研究以肇庆市国有清桂林场简约培育的良种杉木中龄林（9 a）和成熟林（13 a）为对象,采用样方调查和林分空间结构评估等方法,以《杉木丰产林培育技术规程DB44/T 778—2021》为对照标准值,采用单因素方差分析检验林分生长指标的差异显著性。结果表明,中龄林保存率为73.4%、林分密度为1 835株·hm^-2,树高、胸径和蓄积量分别比对照标准值提高22.11%、10.78%和129.98%;成熟林保存率为65.3%、林分密度为1 632株·hm^-2,树高、胸径和蓄积量分别比对照标准值提高1.67%、12.88%和39.59%;不同龄组生长量指标均存在极显著差异或显著差异（P<0.01或P<0.05）;中龄林角尺度（■）、大小比数（■）和密集度（■）分别为0.491、 0.504、 0.516,成熟林则为0.516、 0.500、 0.948。结果显示,简约培育的良种杉木生长质量优于对照标准,但林木个体竞争激烈,在成熟林阶段尤为明显。更多还原

【Abstract】 To clarify the quality characteristics,influencing factors and sustainable management strategies of improved Cunninghamia lanceolata stands under the simplified cultivation mode,this study took 9-year-old mid-aged stands and 13-year-old mature stands of improved C.lanceolata under simplified cultivation at Qinggui State-owned Forest Farm in Zhaoqing City as research objects.The research adopted sample plot investigation and stand spatial structure assessment methods,used the Code of Practice for Cultivation of High-Yield Plantation of Cunninghamia lanceolata（DB44/T 778-2021） as the control standard value,and applied oneway ANOVA to test the significance of differences in stand growth indices.The results showed that the survival rate of mid-aged stands reached 73.4% and the stand density was 1 835 trees·hm^-2;tree height,diameter at breast height（DBH） and stand volume increased by 22.11%, 10.78% and 129.98%,respectively compared with the control standard values.The survival rate of mature stands was 65.3% and the stand density was 1 632 trees·hm^-2;tree height,DBH and stand volume rose by 1.67%, 12.88% and 39.59%,respectively compared with the control standard values.Growth indices of different age groups showed extremely significant or significant differences（P<0.01 or P<0.05）.The middle-aged stand angle scale（■）,size ratio（■）,and density（■） were 0.491, 0.504 and 0.516,respectively,while those of mature stands were 0.516, 0.500 and 0.948 respectively.The results indicated that the growth quality of improved C.lanceolata under simplified cultivation was superior to the control standard.Nevertheless,the study found intense competition among individual trees,which were particularly obvious in the mature stand stage.更多还原