摘要
[目的]探讨品种对榧树针叶-土壤化学计量的影响,为榧树的合理经营管理提供科学依据。[方法]以浙江诸暨树龄300 a左右的不同品种雌榧树(实生雌榧树圆榧、嫁接良种香榧)和实生雄榧树为研究对象,通过野外采集不同品种榧树针叶样品及0~20、20~40、40~60 cm土层土壤样品,分析不同品种榧树针叶-土壤C、N、P含量及化学计量特征变化。[结果](1)圆榧和雄榧树叶片-土壤C、N、P化学计量特征均无显著差异,雌雄异株对榧树化学计量特征无显著影响;(2)香榧、圆榧和雄榧树土壤有机碳(SOC)、土壤全氮(STN)含量差异不显著,0~20 cm土层香榧SOC、STN含量最高,20~40、40~60 cm土层圆榧SOC、STN含量最高;香榧0~20、20~40、40~60 cm土层土壤全磷(STP)含量(2.9、1.5、0.9 g·kg^−1)均显著高于圆榧和雄榧树;(3)香榧、圆榧和雄榧树土壤C:N较C:P、N:P稳定,香榧C:P、N:P显著低于圆榧和雄榧树;(4)香榧针叶全碳(LTC)含量(533.0 g·kg^−1)显著高于圆榧(502.8 g·kg^−1)和雄榧树(502.7 g·kg^−1),C:N与LTC含量变化趋势一致;香榧针叶全氮(LTN)含量(18.5 g·kg^−1)显著低于圆榧(23.2 g·kg^−1)和雄榧树(23.2 g·kg^−1),N:P与LTN含量变化趋势一致;(5)整体上榧树针叶和土壤C、N、P含量及化学计量相关性不显著。[结论]本研究中,雌雄异株对榧树化学计量特征无显著影响,施肥等人为经营活动对榧树林地土壤P含量影响显著。
[Objective]To examine the effects of cultivar and dioecy on stiochiometry of Torreya grandis and provide data for management of T.grandis stands.[Method]The female(T.grandis cv.‘Dielsii’and T.grandis cv.‘Merrilli’)and male T.grandis with age of about 300 years were selected from T.grandis National Forest Park in Zhuji of Zhejiang Province.The leaf and soil samples(0-20,20-40 and 40-60 cm)of different T.grandis species were collected in the field to analyze the C,N,P contents and their stoichiometric characteristics.[Result](1)There was no significant difference in C,N,P contents and stoichiometric characteristics between T.grandis cv.‘Dielsii’and male T.grandis.Dioecy had no significant effects on the stoichiometry of T.grandis.(2)There was no significant difference in C and N contents among T.grandis.The C and N contents in 0-20 cm soil layer of T.grandis cv.‘Merrilli’stand and in 20-40 and 40-60 cm soil layer of T.grandis cv.‘Dielsii’stand were the highest.The content of P in soil of T.grandis cv.‘Merrilli’stand(2.9,1.5 and 0.9 g·kg^−1)was significantly higher than that in T.grandis cv.‘Dielsii’stand and male T.grandis stand.(3)C:N in soil of T.grandis stand were more stable than C:P and N:P.The C:P and N:P in soil of T.grandis cv.‘Merrilli’stand was significantly lower than that in T.grandis cv.‘Dielsii’and male T.grandis stands.(4)The C content in T.grandis cv.‘Merrilli’leaves(533.0 g·kg^−1)was significantly higher than that in T.grandis cv.‘Dielsii’leaves(502.8 g·kg^−1)and male T.grandis leaves(502.7 g·kg^−1).The change trend of C:N and C content in leaves was the same.The N content in leaves of T.grandis cv.‘Merrilli’(18.5 g·kg^−1)was significantly lower than that of T.grandis cv.‘Dielsii’s leaves(23.2 g·kg^−1)and male T.grandis leaves(23.2 g·kg^−1).The change trend of N:P and leaf N content was same.(5)On the whole,there was no significant correlation between C,N,P contents and stoichiometric characteristics in leaves of T.grandis and
作者
原雅楠
李正才
王斌
张雨洁
黄盛怡
YUAN Ya-nan;LI Zheng-cai;WANG Bin;ZHANG Yu-jie;HUANG Sheng-yi(Research Institute of Subtropical Forestry,Chinese Academy of Forestry,Hangzhou 311400,Zhejiang,China)
出处
《林业科学研究》
CSCD
北大核心
2020年第6期49-56,共8页
Forest Research
基金
“十三五”国家重点研发计划项目(2017YFC0505403)。
关键词
榧树
生态化学计量
品种
土壤
针叶
Torreya grandis
stoichiometry
varieties
soil
leaves
