土壤养分对不同生活型植物叶功能性状的影响
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湖北民族学院博士启动基金(MY2017B028,MY2018B027);


Effect of Soil Nutrients on Leaf Functional Traits of Different Life Form Plants
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    摘要:

    以湖北星斗山国家级自然保护区50个亚热带常绿落叶阔叶混交林样地为研究对象,通过样本分析对不同生活型植物(灌木、乔木和木质藤本)的叶功能性状和森林土壤养分进行了测定,并采用冗余分析(RDA)和逐步回归分析了该地区土壤养分对不同生活型木本植物叶功能性状的影响。结果表明:(1)研究区内3种生活型植物的叶功能性状中灌木的比叶面积(SLA)平均值(319.87 cm·g-1)最高,乔木的叶干物质含量(LDMC)平均值(0.40 g·g-1)最高,木质藤本的叶面积(LA)、叶厚度(LT)、叶全氮含量(LTN)和叶全磷含量(LTP)平均值最高,分别为:105.07 cm2、0.24 mm、20.10 mg·kg-1和1.19 mg·kg-1;3种生活型的LDMC、LTN分布都较为集中,而LA、SLA、LTN都呈右偏分布,但LT、LTP的分布乔木呈左偏分布,而灌木和木质藤本均呈右偏分布。(2)研究区域的土壤pH值为3.81~4.95,全部为酸性土壤;土壤有机质含量在4.57%~12.05%之间,平均为7.79%;土壤速效钾和碱解氮含量分别为64.52~339.29和82.83~678.15 mg·kg-1,全氮、全磷、速效磷含量平均值分别为5.48 mg·kg-1、0.46 mg·kg-1和0.39 mg·kg-1。(3)在3种不同生活型叶性状的变异中,土壤养分对木质藤本的解释度最大(24%),其次是灌木(15%),而对乔木解释最低(13%);乔木和木质藤本受到土壤有机质影响较大,灌木受到速效钾影响较大,虽然影响不同生活型叶功能性状的主要因子有所差别,但是其主要的影响因子均为土壤有机质、土壤全磷、速效钾。研究认为,星斗山国家级自然保护区土壤能够在一定程度上解释不同生活型植物叶功能性状变异,并且影响程度存在差异,这种差异有利于该地区物种共存和生物多样性维持。

    Abstract:

    In this paper, 50 subtropical evergreen deciduous broadleaved mixed forest plots in the Xingdoushan National Nature Reserve of Hubei Province were studied. The leaf function of different life forms (shrubs, trees and lianas) and soil nutrients were determined by sample analysis. The determination was carried out, and the effects of soil nutrients on leaf functional traits of different lifetype woody plants were analyzed by redundancy analysis (RDA) and stepwise regression. The results show that: (1) the mean value of specific leaf area (SLA) of shrubs was the highest (319.87 cm·g-1), and the average leaf dry matter content (LDMC) of trees was the highest (0.40 g·g-1), leaf area (LA) of lianas, leaf thickness (LT), leaf total nitrogen content (LTN) and leaf total phosphorus content (LTP) mean value are the highest, They are: 105.07 cm2, 0.24 mm, 20.10 mg·kg-1, 1.19 mg·kg-1; The LDMC and LTN distribution of the three life forms are concentrated, while the distribution of LA, SLA and LTN is right partial, but the distribution of LT and LTP are left partial, while that of shrubs and lianas are right partial distributed. (2) The pH value of soil in the study area is 3.81~4.95, all of which are acidic soil, and the content of soil organic matter is between 4.57% and 12.05%, with an average value of 7.79%; Soil rapidly available potassium and Soil availablenitrogen were as follows: 64.52~339.29 and 82.83~678.15 mg·kg-1, Soil total N content, Soil total phosphorus content and Soil rapidly available phosphorus were as follows: 5.48 mg·kg-1、0.46 mg·kg-1 and 0.39 mg·kg-1. (3) Among variation of leaf traits in three different life forms, soil nutrientshad the highest impacton liana variation, explaining 24% of them, next is shrubs (15%), and the lowestweretrees (13%). (4) Trees and liana are greatly affected by soil organic matter, and shrubs are greatly affected by rapidly available potassium. Although the main factors affecting functional traits of different life types are different, the main influencing factors are soil organic matter, soil total phosphorus, and rapidly available potassium. Research suggests: The soil of Xingdoushan National Nature Reserve can explain the variation of leaf functional traits of different life types of plants to some extent, and the influence degree is different. This difference is beneficial to species coexistence and biodiversity maintenance in this area. At the same time, the study on the relationship between leaf function and soil nutrients of different life type plants in subtropical region was made up.

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黄 小,姚 兰,王 进,等.土壤养分对不同生活型植物叶功能性状的影响[J].西北植物学报,2018,38(12):2293-2302

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  • 在线发布日期: 2019-01-24
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