| 天目铁木和多脉铁木不同器官氮磷钾生态化学计量特征 |
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| 引用本文： | 叶子豪,吴伟峰,彭健健,张崑,蔡广越,李云,战捷佳,吴家森.天目铁木和多脉铁木不同器官氮磷钾生态化学计量特征[J].浙江农林大学学报,2021,38(2):426-432. |
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| 作者姓名： | 叶子豪 吴伟峰 彭健健 张崑 蔡广越 李云 战捷佳 吴家森 |
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| 作者单位： | 浙江农林大学 环境与资源学院，浙江 杭州 311300 |
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| 基金项目： | 浙江省省院合作林业科技项目(2017SY13)。 |
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| 摘 要： | 目的 研究天目铁木Ostrya rehderiana和多脉铁木O. multinervis等2种极小种群植物不同器官的化学计量特征，推测2种植物生长的限制性元素，为林地土壤管理提供科学依据。 方法 以天目铁木和多脉铁木为研究对象，对植物根、枝、叶、树皮全氮、全磷、全钾的质量分数以及土壤基本理化性质进行了测定。采用SPSS软件进行差异显著性检验，分析2种植物不同器官之间的差异。 结果 天目铁木的氮、钾质量分数从大到小依次为叶、枝、皮、根，磷质量分数从大到小依次为枝、根、叶、皮；多脉铁木的氮、钾质量分数从大到小依次为叶、枝、根、皮，磷质量分数从大到小依次为根、枝、叶、皮。天目铁木的氮磷比平均值为3.18~19.22，氮钾比平均值为1.60~2.56，钾磷比平均值为1.97~11.80。多脉铁木氮磷比平均值为3.57~28.43，氮钾比平均值为1.14~4.59，钾磷比平均值为2.77~11.77。2种树种不同器官之间氮、磷、钾生态化学计量特征较为相似，仅多脉铁木根中的氮和叶、枝中的钾显著高于天目铁木的对应器官(P＜0.05)。 结论 影响天目铁木生长的限制性元素是氮和磷，影响多脉铁木生长的限制性元素是磷。因此，在林地土壤管理中，天目铁木应适当增施氮肥和磷肥，而多脉铁木则应适当增施磷肥。图2表1参33
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| 关 键 词： | 森林生态学 天目铁木 多脉铁木 器官 生态化学计量 |
| 收稿时间： | 2020-07-21 |
Ecological stoichiometric characteristics of nitrogen,phosphorus and potassium in different organs of Ostrya rehderiana and O.multinervis |
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| YE Zihao,WU Weifeng,PENG Jianjian,ZHANG Kun,CAI Guangyue,LI Yun,ZHAN Jiejia,WU Jiasen.Ecological stoichiometric characteristics of nitrogen,phosphorus and potassium in different organs of Ostrya rehderiana and O.multinervis[J].Journal of Zhejiang A&F University,2021,38(2):426-432. |
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| Authors: | YE Zihao WU Weifeng PENG Jianjian ZHANG Kun CAI Guangyue LI Yun ZHAN Jiejia WU Jiasen |
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| Institution: | College of Environmental and Resource Sciences, Zhejiang A&F University, Hangzhou 311300, Zhejiang, China |
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| Abstract: | Object]This study aims to explore the stoichiometric characteristics of different organs of two minimal population plants,Ostrya rehderiana and O.multinervis,and to predict the limiting elements of the growth of the two plants,so as to provide scientific basis and suggestions for forest soil management.Method]The mass fractions of total nitrogen,total phosphorus and total potassium in roots,branches,leaves and bark of plants as well as the basic physical and chemical properties of soil were determined.SPSS software was used to test the significance of differences and analyze the differences among different organs of the two plants.Result]The N and K fractions of O.rehderiana in order from large to small were leaf,branch,bark and root,and the P fraction was branch,root,leaf and bark.The N and K fractions of O.multinervis in order from large to small were leaf,branch,root and bark,and the P mass was root,branch,leaf and bark.The mean values of N∶P,N∶K and K∶P in O.rehderiana were 3.18-19.22,1.60-2.56,and 1.97-11.80,respectively.The mean values of N∶P,N∶K and K∶P in O.multinervis were 3.57-28.43,1.14-4.59,and 2.77-11.77,respectively.The ecological stoichiometric features of N,P and K among different organs of the two species were similar,and only N in roots and K in leaves and branches of O.multinervis were significantly higher than those in the corresponding organs of O.rehderiana(P<0.05).Conclusion]The limiting elements affecting the growth of O.rehderiana are N and P,and the one affecting the growth of O.multinervis is P.Therefore,in woodland soil management,N and P fertilizer should be properly applied to O.rehderiana,while P fertilizer should be properly applied to O.multinervis. |
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| Keywords: | forest ecology Ostrya rehderiana Ostrya multinervis organ ecological stoichiometry |
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