造林密度和抚育措施对杉木幼林生长和土壤酶活性的影响  

Effects of Afforestation Densities and Tending Measures on the Growth and Soil Enzyme Activity of Cunninghamia lanceolata Plantation SU Sunqing

作　　者：苏孙卿 SU Sunqing(Youxi State-owned Forest Farm of Fujian Province,Sanming 365100,Fujian,China)

机构地区：[1]福建省尤溪国有林场,福建三明365100

出　　处：《福建林业科技》2025年第1期28-34,共7页Journal of Fujian Forestry Science and Technology

基　　金：福建省林业科技项目(闽林科便函[2020]29号)。

摘　　要：为研究不同造林密度和抚育方式对杉木幼林生长和土壤酶活性的影响,使用2年生杉木幼苗造林(以杉木1年生苗传统造林模式为对照),采用L 9(34)正交试验设计,分析不同造林密度(1665、1995、2505株·hm^(-2))及不同幼林抚育方式(穴抚、全劈、穴抚+全劈)对造林2 a后的杉木幼林生长以及土壤酶活性的影响。结果表明:①不同造林方式对杉木造林存活率没有显著影响(P>0.05);②与CK相比,不同造林密度及抚育方式显著促进林分胸径生长(P<0.05),但对树高的生长影响不显著(P>0.05),其中T 3处理(密度1665株·hm^(-2),全劈)的树高和胸径生长量均最大,分别较CK提高16.67%和75.14%;③0—20 cm土层中,不同处理的土壤酸性磷酸酶、蔗糖酶、过氧化物酶均大于CK,增幅分别介于11.13%~22.89%、8.94%~47.83%、10.08%~28.38%,而且随着土壤深度的增加土壤酶活性总体呈下降趋势。综合来看,适宜杉木2年生苗木造林的密度和抚育措施为造林密度1665株·hm^(-2),全劈的抚育方式。In order to study the effects of different afforestation densities and tending measures on the growth and soil enzyme activity of Cunninghamia lanceolata young forest,an L 9(34)orthogonal experimental design was employed to investigate the effects of different afforestation densities(1665 plants·hm^(-2),1995 plants·hm^(-2) and 2505 plants·hm^(-2))and young forest tending measures(hole tending,full split,hole tending+full split)on the growth and soil enzyme activity of C.lanceolata young forest after 2 years of planting.Two-year-old C.lanceolata seedlings were used for ecological afforestation treatments,and a traditional afforestation method of one-year-old C.lanceolata seedlings was included as control(CK).The results showed that①Different afforestation methods had no significant effect on the survival rate of C.lanceolata plantation(P>0.05).②Compared with the CK,different afforestation densities and tending measures significantly promoted the growth of diameter at breast height(DBH)(P<0.05),but no significant differences were observed in tree height between different treatments and CK(P>0.05).The maximum values of tree height and DBH were observed in the T 3 treatment(1665 plants·hm^(-2),full split),which were 16.67%and 75.14%higher than CK,respectively.③In the 0—20 cm soil layer,soil acid phosphatase,sucrase,and peroxidase activities of different treatments were higher than those of CK,with increases ranging from 11.13%to 22.89%,8.94%to 47.83%,and 10.08%to 28.38%,respectively.Soil enzyme activity generally showed a downward trend with the increase in soil depth.In summary,the suitable density for two-year-old C.lanceolata container seedlings afforestation is 1665 plants·hm^(-2),and the full split measures should be adopted.Under these conditions,relatively satisfactory growth results can be achieved.

关 键 词：杉木 造林密度 抚育方式 幼林生长 土壤酶活性 

分 类 号：S791.27[农业科学—林木遗传育种] S725.6[农业科学—林学]