[1]刘亚群,胡德胜,柏明娥.不同树龄香榧叶片与土壤碳氮磷生态化学计量特征[J].浙江林业科技,2023,43(03):30-37.[doi:10.3969/j.issn.1001-3776.2023.03.005]
 LIU Ya-qun,HU De-sheng,BAI Ming-e.Stoichiometric Characteristics of Carbon, Nitrogen and Phosphorus Content in Leaves and Soil of Different Aged Torreya grandis‘Merrillii’[J].Journal of Zhejiang Forestry Science and Technology,2023,43(03):30-37.[doi:10.3969/j.issn.1001-3776.2023.03.005]
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不同树龄香榧叶片与土壤碳氮磷生态化学计量特征()
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《浙江林业科技》[ISSN:1001-3776/CN:33-1112/S]

卷:
43
期数:
2023年03期
页码:
30-37
栏目:
出版日期:
2023-05-20

文章信息/Info

Title:
Stoichiometric Characteristics of Carbon, Nitrogen and Phosphorus Content in Leaves and Soil of Different Aged Torreya grandis‘Merrillii’
文章编号:
1001-3776(2023)03-0030-08
作者:
刘亚群1胡德胜2柏明娥1
1.浙江省林业科学研究院,浙江 杭州 310023;2.桐庐县林业技术推广中心,浙江 桐庐 311500
Author(s):
LIU Ya-qun1HU De-sheng2BAI Ming-e1
1.Zhejiang Academy of Forestry , Hangzhou 310023, China;2.Tonglu Forestry Extension Center of Zhejiang, Tonglu 311500, China
关键词:
香榧树龄叶片土壤生态化学计量
Keywords:
Torreya grandis‘Merrillii’ tree-ages leaves soil ecological stoichiometry
分类号:
S791.53
DOI:
10.3969/j.issn.1001-3776.2023.03.005
文献标志码:
A
摘要:
以浙江省诸暨市20、100和500a树龄的香榧Torreyagrandis‘Merrillii’为研究对象,分析了香榧叶片和土壤全碳(C)、全氮(N)、全磷(P)的生态化学计量特征及其相关性。结果表明:不同树龄香榧叶片C、N、P含量的平均值分别为437.38、23.16和2.25g·kg-1,C∶N、C∶P、N∶P的平均值分别为19.18、197.73、10.37,叶片C含量和C∶N随树龄的增加先上升后又有所下降,叶片N含量和N∶P随树龄的增加先下降后又有所上升,叶片P含量和C∶P基本保持稳定,不同树龄香榧叶片C、N、P含量及化学计量比差异不显著(P>0.05);不同树龄香榧土壤C、N、P含量的平均值分别为28.66、3.02和3.12g·kg-1,土壤C、N、P含量随树龄的增加总体呈上升趋势;土壤C∶N、C∶P、N∶P平均值分别为9.42、9.96、1.06,不同树龄土壤C∶N基本保持稳定,而C∶P、N∶P均随树龄的增加而下降。相关性分析结果表明,香榧叶片N含量与C∶N、叶片P含量与C∶P呈极显著负相关(P<0.01),土壤C含量与土壤N含量呈极显著正相关(P<0.01),土壤P含量与土壤N∶P呈显著负相关(P<0.05);叶片C、N、P含量与土壤C、N、P含量的相关性不显著,土壤C∶N与叶片N含量呈显著正相关,与叶片C∶N呈显著负相关。综合分析认为,香榧叶片和土壤中的N、P含量均高于我国土壤N、P含量的平均水平,相较N、P而言,由于土壤中有机质的矿化速率高,不利于C的积累,建议在对香榧的养分管理中应以增施有机碳肥为主,尤其是新造香榧林。
Abstract:
In late August 2021, 20-, 100-and 500-year Torreya grandis‘Merrillii’(3 trees each) were selected in Zhuji, Zhejiang province to collect samples of branch, leaves and soil. Determinations were implemented on their carbon, nitrogen and phosphorus content. The results show that average contents of C, N and P in different aged T. grandis‘Merrillii’leaves were 437.38, 23.16 and 2.25 g/kg. The average values of C∶N, C∶P and N∶P were 19.18, 197.73 and 10.37. Leaf C content and C:N increased first and then decreased with the increase of tree age, while leaf N content and N∶P decreased first and then increased, leaf P content and C : P remained stable. The contents of C, N and P and stoichiometric ratio of different aged T. grandis‘Merrillii’leaves had no significant differences (P>0.05). The average soil C, N and P contents of different aged trees were 28.66, 3.02 and 3.12 g/kg. Soil C, N and P contents generally increased with the increase of tree age. The average values of soil C∶N, C∶P and N∶P were 9.42, 9.96 and 1.06. Soil C∶N remained stable of different aged trees, while soil C∶P and N∶P decreased with the increase of tree age. Correlation analysis showed that leaf N content had extremely significant negative relation with C∶N, as well as leaf P content with C∶P (P<0.01), while soil C content had extremely significant positive relation with soil N (P<0.01), and soil P content significant negative relation with soil N∶P (P<0.05). Leaf C, N, P contents were not significantly correlated with soil C, N, P ones. Soil C∶N had evident positive relation with leaf N, and significant negative relation with leaf C∶N. Comprehensive analysis showed that the content of N and P in T. grandis‘Merrillii’leaves and soil were higher than the average level in China. Soil C was not easy to accumulate due to the high rate of mineralization of organic matter. It is suggested that the nutrient management of T. grandis‘Merrillii’should mainly increase the application of organic carbon fertilizer, especially in the new forest.

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备注/Memo

备注/Memo:
收稿日期:2022-12-13;修回日期:2023-03-15
基金项目:浙江省省院合作重点项目(2018SY09)
作者简介:刘亚群,高级工程师,从事林业土壤与植物研究;E-mail:liuyaqun2005@aliyun.com。
通信作者:柏明娥,研究员,从事森林资源培育技术研究;E-mail:baiminge66@163.com。
更新日期/Last Update: 2023-05-20