文献类型：期刊文献

中文题名：不同林龄榧树林地土壤碳氮磷化学计量特征

英文题名：Stoichiometric characteristics of soil C,N and P in Torreya grandis stands of different ages

作者：原雅楠[1] 李正才[1] 王斌[1] 张雨洁[1] 黄盛怡[1]

第一作者：原雅楠

机构：[1]中国林业科学研究院亚热带林业研究所,浙江杭州311400

年份：2021

卷号：38

期号：5

起止页码：1050-1057

中文期刊名：浙江农林大学学报

外文期刊名：Journal of Zhejiang A&F University

收录：CSTPCD;;北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

基金：国家重点研发计划项目(2017YFC0505403)。

语种：中文

中文关键词：榧树;林龄;土壤;碳;氮;磷;化学计量

外文关键词：Torreya grandis;stand age;soil;C;N;P;stoichiometry

分类号：S718.5

摘要：【目的】了解不同林龄榧树Torreya grandis林地土壤碳、氮、磷质量分数及生态化学计量特征的变化,为榧树的经营管理和保护提供基础数据。【方法】以浙江省诸暨市香榧T.grandis‘Merrilli’国家森林公园4个不同林龄(0~100、100~300、300~500和>500 a)的榧树为研究对象,通过野外采集榧树林地不同土层(0~20、20~40和40~60 cm)的土壤样品,分析不同林龄榧树林地土壤碳、氮、磷质量分数及化学计量特征的变化。【结果】①不同林龄榧树林地土壤碳、氮质量分数分别为10.90~24.22、1.22~2.22 g·kg^(-1),各土层碳、氮质量分数随林龄变化呈先增加后降低的趋势;不同林龄榧树林地土壤磷质量分数为0.24~0.80 g·kg^(-1),各土层土壤磷质量分数随林龄变化呈先降低后增加的趋势,但差异均不显著(P>0.05)。②不同林龄榧树林地土壤碳氮比、氮磷比均值分别为8.59~10.89、3.06~6.16,各土层土壤碳氮比、氮磷比随林龄变化呈先增加后降低的趋势,但差异均不显著(P>0.05);不同林龄榧树林地土壤碳磷比为31.54~63.72,各土层土壤碳磷比随年龄变化也呈先增加后降低的趋势,部分林龄碳磷比差异显著(P<0.05)。③榧树各林龄林地土壤碳、氮、磷之间有较强的正相关,碳和氮均达到极显著正相关(P<0.01),各林龄土壤磷与碳磷比和氮磷比均存在负相关,碳磷比和氮磷比均达到极显著正相关(P<0.01)。【结论】榧树生长主要受到土壤磷的限制,因此对榧树林经营时,可考虑合理添加磷肥来改善土壤肥力,促进土壤与植物之间养分的良性循环。
[Objective]This objective is to investigate the contents and stoichiometric characteristics of soil organic C,total N and total P in Torreya grandis stands of different ages,so as to provide basic data for the management and protection of T.grandis.[Method]T.grandis of four different ages(0^(-1)00,100?300,300?500 and>500 a)were selected from Zhuji National Forest Park of T.grandis‘Merrilli’in Zhejiang Province.Soil samples were collected from different soil layers(0?20,20?40,40?60 cm)to analyze the content and stoichiometric characteristics of soil C,N,and P in T.grandis stands of different ages.[Result](1)The contents of soil organic C and total N at four ages were 10.90?24.22 and 1.22?2.22 g·kg^(-1)respectively,which increased first and then decreased with forest age,but without significant differences.The contents of soil total P ranged from 0.24 to 0.80 g·kg^(-1),which decreased first and then increased with forest age,but the differences were not significant(P>0.05).(2)The average values of soil C∶N and N∶P at four ages were 8.59^(-1)0.89 and 3.06?6.16 respectively,which increased first and then decreased with forest age,but the differences were not significant(P>0.05).The soil C∶P ratio was 31.54?63.72 at different forest ages,which showed a trend of decreasing first and then increasing with age,and the C∶P ratio of some forest ages had significant differences(P<0.05).(3)There was a significant positive correlation between soil C,N,and P contents at different forest ages,and extremely significant positive correlation between C and N(P<0.01).There was a significant negative correlation between P and C∶P ratio,P and N∶P ratio,and an extremely significant positive correlation between C∶P ratio and N∶P ratio(P<0.01).[Conclusion]The growth of T.grandis is mainly limited by soil P.Therefore,reasonable addition of P fertilization can be considered to improve soil fertility and nutrient cycling between plant and soil.