| 高春莲,汪珍川,胡宝清,等.杉木、桉树、马尾松人工林非共生固氮量空间变异与分布特征 ——以广西高峰林场为例[J].广东农业科学,2024,(5-7):- |
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杉木、桉树、马尾松人工林非共生固氮量空间变异与分布特征 ——以广西高峰林场为例 |
| The spatial variation and distribution characteristics of asymbiotic dinitrogen fixation in Cunninghamia lanceolata, Eucalyptus, Pinus massoniana Plantation Forests--Taking Guangxi Gaofeng Forestry as an example |
| 投稿时间：2024-01-17 修订日期：2024-03-22 |
| DOI： |
| 中文关键词: 非共生固氮量 空间分布 克里金插值 人工林 高峰林场 |
| 英文关键词: asymbiotic nitrogen fixation spatial distribution kriging interpolation plantation forest Guangxi Gaofeng Forestry |
| 基金项目:广西科技计划项目（桂科AD20297037；2021GXNSFBA075058） |
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| 摘要点击次数: 36 |
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| 中文摘要: |
| 摘 要：【目的】为探究不同生长季杉木、桉树、马尾松人工林不同生态系统组分非共生固氮量空间分布变化与含量差异，【方法】利用普通克里金插值分析、方差分析和相关性分析方法，以广西高峰林场杉木、桉树、马尾松混交林为研究对象，通过测定生长季与非生长季土壤、凋落物和冠层叶片非共生固氮量，展开空间变异与含量差异特征研究。【结果】无论生长季还是非生长季，人工林各组分非共生固氮量变化趋势不同且显著，空间相关强烈且异质性强。生长季，土壤非共生固氮量呈现东北低西南高的分布特征，凋落物、冠层叶片与之相反，呈东北高西南低的特征；非生长季，土壤和冠层叶片量空间分布大体上与生长季相似，凋落物则相反。人工林土壤非共生固氮量最高，为1.2834 kg N/ha·y、0.5668 kg N/ha·y，冠层叶片最低，为0.0009 kg N/ha·y、0.0028 kg N/ha·y。土壤非共生固氮量与凋落物、冠层叶片存在显著差异。生长季，土壤非共生固氮量与凋落物呈显著负相关，其它组分间相关性不显著；非生长季，各组分之间非共生固氮量不存在显著相关性。【结论】杉木、桉树、马尾松人工林不同季节各组分非共生固氮量空间分异特征显著且强烈，非共生固氮量主要存在土壤组分中。因此，在杉木、桉树、马尾松种植过程中对土壤施入一定氮肥，可促进人工林生长。 |
| 英文摘要: |
| Abstract: 【Objective】 To investigate the spatial distribution and content differences of asymbiotic dinitrogen fixation (ANF) in different ecosystem components of Cunninghamia lanceolata, Eucalyptus, Pinus massoniana plantation forests in different growing seasons. 【Methods】 Using ordinary kriging interpolation, analysis of variance and correlation analysis, we conducted a characterisation study of spatial variability and content differences in ANF of Cunninghamia lanceolata, Eucalyptus, Pinus massoniana plantation forests in the Guangxi Gaofeng Forestry by determining the amount of ANF of the soil, litter and canopy leaves in the growing season and non-growing season. By measuring the amount of ANF in soil, litter and canopy leaves during the growing and non-growing seasons, spatial variation and content differences were investigated. 【Results】In both growing and non-growing seasons, the trends of ANF in each component of plantation forest were different and significant, with strong spatial correlation and heterogeneity. In the growing season, the distribution of soil ANF was low in the northeast and high in the southwest, and the distribution of litter and canopy leaves was high in the northeast and low in the southwest, on the contrary; in the non-growing season, the spatial distributions of soil and canopy leaves were generally similar to those in the growing season, and the litter was true for apoplastic material. Soil ANF was the highest in plantation forests, at 1.2834 kg N/ha-y and 0.5668 kg N/ha-y, and the lowest in canopy leaves, at 0.0009 kg N/ha-y and 0.0028 kg N/ha-y. Soil ANF differed significantly from that in litter and canopy leaves. In the growing season, the amount of soil ANF was significantly negatively correlated with litter, and the correlation between the other components was not significant; in the non-growing season, the amount of ANF between the components did not have a significant correlation. 【Conclusion】 The spatial differentiation of ANF in different seasons of Cunninghamia lanceolata, Eucalyptus, Pinus massoniana plantation forests was significant and strong, and ANF mainly existed in the soil fraction. Therefore, the application of a certain amount of nitrogen fertiliser to the soil during the planting of Cunninghamia lanceolata, Eucalyptus, Pinus massoniana can promote the growth of plantation forests. |
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