苗龄对华木莲苗木质量及其造林成效的影响  

Effects of seedling age on the seedling quality and field performance of Sinomanglietia glauca young plantation

作　　者：龙桂根 王勇 李峰 吴南生[2,3] 李乾明 杨细兰 郑庆衍 Long Guigen;Wang Yong;Li Feng;Wu Nansheng;Li Qianming;Yang Xilan;Zheng Qingyan(Yichun Forestry Research Institute,Yichun Jiangxi 336000,China;Cllege of Forestry,Jiangxi Agricultural University,Nanchang Jiangxi 330045,China;Research Institute of Choerospondias Axillaris,Jiangxi Agricultural University,Nanchang Jiangxi 330045,China)

机构地区：[1]宜春市林业科学研究所,江西宜春336000 [2]江西农业大学·林学院,江西南昌330045 [3]江西农业大学·南酸枣研究所,江西南昌330045

出　　处：《南方林业科学》2021年第4期10-15,共6页South China Forestry Science

基　　金：江西省省级林业专项资金林木种苗补助项目(赣林函字〔2021〕3号)。

摘　　要：为更好提高华木莲造林质量,以1年生(S1-0)、2年生(S2-0)、3年生(S3-0)实生苗进行造林试验,分析了不同苗龄苗木的质量及其造林效果的差异。结果表明:1)华木莲苗期生长指标与苗龄显著正相关,苗木在第2年的各生长指标的相对生长率显著高于第3年;2)采用S2-0、S3-0苗营造的人工林第1年的成活率分别为93%、90%,显著高于S1-0林分的成活率;S2-0林分第2、3年保存率分别为89%、84%,显著高于S3-0、S1-0林分;3)生长指标来看,S1-0、S2-0、S3-0“同年造林”时,造林后第2年、第3年,S2-0林分的树高生长量、地径生长量均显著高于S1-0、S3-0林分;苗木“逐年造林”时,在树龄为6 a时,S1-0、S2-0、S3-03种苗型所造林分的树高无显著差异,S2-0、S1-0所造林分的地径均显著高于S3-0林分。4)叶绿素含量来看,S1-0与S2-0所造人工林在第3年时SPAD值分别为60.05、47.12,高于S3-0所造3 a人工林的SPAD;5)相关性分析表明,仅有苗龄与1 a林分的树高、地径、保存率等指标相关系数在0.75以上,为显著正相关。综合保存率、生长量、叶绿素含量等指标,S2-0苗适应性强,所造林分质量稳定,效果更佳。在同等条件下,华木莲苗龄显著地影响造林效果,造林时选用合格的S2-0苗能提高华木莲造林成效。In order to improve the afforestation quality of Sinomanglietia glauca,the quality characteristics of different seedling ages of S.glauca and their effects on afforestation were analyzed.1-year-old(S1-0),2-year-old(S2-0)and 3-year-old(S3-0)seedlings were used for afforestation in the same year and year by year.After afforestation for three consecutive years,the preservation rate,ground diameter,tree height,chlorophyll content and other indicators were measured.The results showed that there was a significant positive correlation between seedling age and growth indexes of S.glauca,and the relative growth rate of each growth index in the second year was significantly higher than that in the third year.And the survival rates of stands planted with S2-0 and S3-0 in the first year were 93%and 90%respectively,which were significantly higher than that of S1-0 stands;the survival rates of stands planted with S2-0 in the second and third years were 89%and 84%respectively,which were significantly higher than that of stands planted with S3-0 and S1-0.In terms of growth index,when S1-0,S2-0 and S3-0 were planted in the same year,the ground diameter growth and height growth of S2-0 stand was significantly higher than that of stands planted with S1-0 and S3-0;and the 6-year-old stands planted with S1-0,S2-0 and S3-0 year by year,there was no significant difference in tree height among the stands of S1-0,S2-0 and S3-0,while the ground diameter of stands planted with S2-0 and S1-0 were significantly higher than that of stands planted with S3-0.In terms of chlorophyll content,the SPAD values of 3-year-old stands planted with S1-0 and S2-0 seedlings were 60.05 and 47.12 respectively,which were higher than that of 3-year-old stands planted with S3-0.The correlation analysis showed that the correlation coefficients between seedling age and tree height,ground diameter and preservation rate of one-year stands were more than 0.75,which were significant positive correlation.Comprehensive conservation rate,growth,chlorophyll content and o

关 键 词：华木莲 苗龄 苗木质量 造林效果 

分 类 号：S792.219[农业科学—林木遗传育种]