杉木林下闽楠更新层混交技术  

Research on Companion Planting Techniques in the Un derstory of Cunninghamia lanceolata Forest with Phoebe bournei Regeneration Layer

作　　者：何绍斌 HE Shaobin(Forestry Bureau in Shaxian District,Sanming,Saxian 365500,Fujian,China)

机构地区：[1]三明市沙县区林业局,福建沙县365500

出　　处：《福建林业科技》2024年第3期7-11,33,共6页Journal of Fujian Forestry Science and Technology

基　　金：中国农村技术开发中心(2016YFD 0600603-2)。

摘　　要：采用完全随机区组试验设计,研究不同混交比例和伴生树种对林下种植闽楠生长的影响。结果表明:混交比例对林下种植闽楠生长有极显著作用,较低混交比例(5楠1樟)能够显著促进闽楠的生长,而高混交比例(1楠1樟),对闽楠生长有着极显著性抑制作用;不同伴生树种对林下闽楠、伴生树种及整体林分生长均有极显著影响,早期速生的香樟、枫香、山杜英、木荷均能适应林下更新层生长,是闽楠更新层混交林营建中的优良伴生树种。在林下闽楠更新层培育过程中,对闽楠生长有促进作用的混交比例均在20%以下,且伴生树种均较闽楠速生。因此选择前期速生的伴生树种并保持较低的伴生树种比例是林下混交种植闽楠促成技术的关键;对于高混交比例模式,可通过间伐、间挖等方式对伴生树种进行早期收获,调整种间关系,改善生长光环境和营养供给,促进闽楠生长。Using a completely randomized block experimental design,the influence of different companion planting ratios and companion tree species on the growth of Phoebe bournei planted in the understory was studied.The results showed that the companion planting ratio had a highly significant effect on the growth of Phoebe bournei in the understory.Specifically,at a lower companion planting ratio(5 Phoebe bournei to 1 Camphora officinarum),it significantly promoted the growth of Phoebe bournei,while at a higher companion planting ratio(1 Phoebe bournei to 1 Camphora officinarum),it had a highly significant inhibitory effect on the growth of Phoebe bournei.Different companion tree species had a highly significant impact on the growth of Phoebe bournei in the understory,companion tree species,and the overall stand.Early-growing species such as Camphora officinarum,Liquidambar formosana,Elaeocarpus sylvestris and Schima superba were all suitable companion tree species in the construction of mixed forests with Phoebe bournei in the understory.During the cultivation process of the understory Phoebe bournei layer,mixed planting ratios that promote the growth of Phoebe bournei were all below 20%.Moreover,companion tree species grow faster than Phoebe bournei.Therefore,selecting early-growing companion tree species and maintaining a lower ratio of companion tree species was key to the technology of promoting Phoebe bournei growth in the understory mixed plantation.For high mixed planting ratio models,early harvesting of companion tree species can be achieved through thinning and selective digging to adjust interspecies relationships,improve the growth environment,and nutrient supply,thereby promoting the growth of Phoebe bournei.

关 键 词：杉木 林下更新层 闽楠 伴生树种 混交技术 

分 类 号：S792.24[农业科学—林木遗传育种]