不同地形木荷幼苗生长与土壤养分特征  

Growth of Schima superba Seedlings in Different Terrains and Characteristics of Soil Nutrients

作　　者：汤道平 TANG Daoping(Xipi State-owned Forest Farm of Hua′an,Hua′an 363807,Fujian,China)

机构地区：[1]福建省华安西陂国有林场,福建华安363807

出　　处：《福建林业科技》2024年第4期76-81,共6页Journal of Fujian Forestry Science and Technology

基　　金：福建省林业科技项目(2023FKJ20);福建省林木种苗科技攻关第七期项目(ZMGG-0703)。

摘　　要：为探寻木荷幼苗生长与地形及土壤养分的关系,2023年在华安西陂国有林场对不同坡位、坡向木荷幼苗的生长指标以及土壤养分含量进行测定和比较分析。结果表明:不同坡位条件下木荷生长状况以及土壤养分均存在显著差异,下坡位木荷地径、树高、冠幅平均值,分别为11.58 mm、89.64 cm、59.24 cm,比中坡位高出12.87%、16.22%、28.25%,比上坡位木荷高出26.56%、26.45%、45.41%;不同坡位的土壤有机质、全氮、全钾、碱解氮、速效钾含量均表现为下坡位最高,中坡位次之,上坡位最少。不同坡向的木荷生长状况差异不显著,以南坡的生长状况最好,其地径、树高、冠幅平均值分别可达10.86 mm、80.90 cm、51.28 cm;且南坡土壤中的各养分含量均最高。木荷地径、树高、冠幅生长状况均与全氮、全钾、碱解氮、速效钾以及有机质含量呈显著正相关,且与有机质之间的相关性更强。综合结果表明,在营建木荷人工林时,宜选择土壤有机质以及氮、钾含量较高的南坡的下坡位造林,以提高木荷人工林生长质量。In order to explore the relationship between the growth of Schima superba seedlings and terrain and soil nutrients,in 2023,the growth indicators of Schima superba seedlings at different slope positions and orientations,as well as the nitrogen,phosphorus,potassium,and organic matter content in the soil,were measured and compared in the Xipi State-owned Forest Farm of Hua′an.The results showed that there were significant differences in the growth status and soil nutrients of Schima superba under different slope conditions.The average ground diameter,tree height,and crown width of Schima superba on the lower slope were 11.58 mm,89.64 cm and 59.24 cm,respectively,which were 12.87%,16.22%and 28.25%higher than those on the middle slope,26.56%,26.45%and 45.41%higher than those on the upper slope.The content of soil organic matter,total nitrogen,total potassium,alkaline nitrogen,and available potassium in different slope positions was highest in the downhill position,followed by the middle slope position,and the lowest in the uphill position.The growth of Schima superba planted on the southern slope was the best,with an average ground diameter,tree height,and crown width of 10.86 mm,80.90 cm,and 51.28 cm,respectively;and the nutrient content in the soil on the southern slope was the highest;the growth status of Schima superba in terms of ground diameter,tree height,and crown width was significantly positively correlated with total nitrogen,total potassium,alkaline nitrogen,available potassium and organic matter content,with a stronger correlation with organic matter.Therefore,in the construction of artificial Schima superba forests in the future,it is necessary to choose the downhill of the southern with higher organic matter and nitrogen and potassium content for afforestation,in order to improve the growth quality of Schima superba plantations.

关 键 词：木荷 坡位 坡向 生长状况 土壤养分 

分 类 号：S714.2[农业科学—林学] S718.511