摘要
为了研究连栽对红心杉林木生长量和土壤酶活性的影响,笔者运用空间替换时间、相关性以及通径分析方法,对比第1(G1)、2(G2)、3(G3)代红心杉人工林的林木生长特性,探讨土壤酶活性对红心杉生长量的影响程度和机理。结果表明:红心杉的生长量随连栽代数的增加而降低;天然林以及第1、2、3代红心杉林地中的脲酶活性随着土层的加深均显著降低(P<0.05);磷酸酶和过氧化氢酶活性分别对红心杉的胸径和树高生长具有强烈的直接作用,直接通径系数分别为1.115和1.085。连栽导致红心杉林木生长量和土壤酶活性逐代降低,且红心杉林木生长量受磷酸酶和过氧化氢酶活性影响较大。
The paper aims to study the effects of successive planting on the growth and soil enzyme activities of Cunninghamia lanceolata.We compared the growth characteristics of the first (G1),second (G2)and third (G3) generation of C.lanceolata by the methods of space-for-time,the correlation and path analysis and analyzed the effects of soil enzyme activities on the growth of C.lanceolata and its mechanism.The results showed that: with the increase of planting generations,the growth of C.lanceolata showed a decreasing trend;the urease activity of G1,G2,G3 and CK decreased significantly with the soil depth (P<0.05);the activities of phosphatase and catalase had strong direct effects on the DBH and height growth of C.lanceolata;the path coefficients were 1.115 and 1.085,respectively.Soil enzyme activities and the growth of C.lanceolata decrease with the successive planting,and the growth of C.lanceolata is greatly influenced by phosphatase and catalase activity.
作者
廖美振
阳胜男
张斌
朱宁华
邓湘雯
付豪
Liao Meizhen;Yang Shengnan;Zhang Bin;Zhu Ninghua;Deng Xiangwen;Fu Hao(Chenshan Forest Farm,Anfu 343200,Jiangxi,China;Huanfa New Technology Company,Central South Forestry Survey and Planning Institute,State Forestry Administration,Changsha 410000,Hunan,China;College of Forestry,Central South University of Forestry and Technology,Changsha 410004,Hunan,China)
出处
《农学学报》
2018年第11期38-45,共8页
Journal of Agriculture
基金
国家重点研发计划课题"不同产区杉木高值化装饰材培育技术研究"(2016YFD0600303)
关键词
红心杉
连栽
林木生长量
土壤酶活性
通径分析
Cunninghamia lanceolate
Successive Planting Generations
Growth of Stand
Soil Enzyme Activity
Path Analysis
