间伐强度对杉木生长和土壤的影响研究  

Effects of Thinning Intensities on Cunninghamia Lanceolata Growth and Soil

作　　者：陈国强 Chen Guoqiang(Muse State-owned Forest Farm,Chishui City,Zunyi City,Chishui 564700,Guizhou,China)

机构地区：[1]赤水市木司国有林场,贵州赤水564700

出　　处：《绿色科技》2024年第15期94-97,102,共5页Journal of Green Science and Technology

摘　　要：分析了间伐强度对国有林场杉木的林下植被和土壤特征的影响。在贵州省遵义市赤水市木司国有林场选择某杉木林基地开展试验,根据不同间伐强度分为4个处理,CK(无间伐)、Z1(间伐强度20%)、Z2(间伐强度30%)、Z3(间伐强度50%),对不同间伐强度下杉木林下植被数量和土壤特征进行调查。结果表明:Z2的灌木植物、草本植物和藤本植物新增种类高于其他处理,Z2灌木植物新增种类较CK、Z1和Z3分别增加了2.8倍、2倍和1.4倍,草本新增种类较CK、Z1和Z3分别增加了2.33倍、2倍和1.4倍,藤本植物新增种类较CK、Z1和Z3分别增加了2.75倍、1.83倍和1.38倍;Z2处理的平均胸径增长量、平均树高增长量、平均蓄积增长量、平均材积增长量的增幅率高于其他处理(P<0.05);不同间伐强度下的杉木林林下植被多样性比较为:Z2>Z1>Z3>CK,说明相比于无间伐、间伐强度20%、间伐强度50%,间伐强度30%的杉木抚育更利于植物多样性的增加;Z2的有效磷、碱解氮、速效钾和有机质高于其他处理(P<0.05),4个处理的pH值无差异(P>0.05),整体比较为:Z2>Z3>Z1>CK。指出了不同间伐强度影响杉木的生长,其中间伐强度30%可维持杉木林生态系统的稳定性,增加杉木林植被多样性,改善杉木林土壤性质,促进杉木林生长。The effects of thinning intensity on understory vegetation and soil characteristics of Cunninghamia Lanceolata in state-owned forest farm were analyzed.A Cunninghamia Lanceolata forest base was selected from the Muse State-owned Forest Farm in Chishui City,Zunyi City,Guizhou Province,and four treatments were divided according to different thinning intensity.CK(no thinning),Z1(thinning intensity 20%),Z2(thinning intensity 30%)and Z3(thinning intensity 50%)were used to investigate the vegetation quantity and soil characteristics of Cunninghamia Lanceolata under different thinning intensity.The newly added species of shrubs,herbs and vines under Z2 treatment were higher than those under other treatments.The newly added species of shrub plants under Z2 increased 2.8 times,2 times and 1.4 times compared with CK,Z1 and Z3,respectively,and the newly added species of herbs increased 2.33 times,2 times and 1.4 times compared with CK,Z1 and Z3,respectively.Compared with CK,Z1 and Z3,the new species of vines increased 2.75 times,1.83 times and 1.38 times,respectively.The average DBH growth,average tree height growth,average stock growth and average volume growth of Z2 treatment were higher than those of other treatments(P<0.05).Under different thinning intensities,the vegetation diversity of Cunninghamia Lanceolata forests was Z2>Z1>Z3>CK,indicating that the tending of Cunninghamia Lanceolata with thinning intensity of 30%was more conducive to the increase of plant diversity than that without thinning,thinning intensity of 20%and thinning intensity of 50%.The available phosphorus,alkali-hydrolyzed nitrogen,available potassium and organic matter of Z2 treatment were higher than those of other treatments(P<0.05),and there was no difference in pH of the four treatments(P>0.05).The overall trend was Z2>Z3>Z1>CK.Different thinning intensities affect the growth of Cunninghamia Lanceolata.Thinning intensities of 30%can maintain the stability of Cunninghamia Lanceolata forest ecosystem,increase the vegetation diversity of Cunningha

关 键 词：间伐强度 国有林场 杉木林 林下植被 土壤特征 

分 类 号：S718.3[农业科学—林学]