| 摘要: |
| 为了解古树的衰弱成因，制定科学的复壮措施，测定和分析衰弱古树绿叶和凋落叶的养分含
量、土壤养分含量以及土壤重金属含量是有效途径。通过对粤北地区的苦槠 Castanopsis sclerophylla、榕
Ficus microcarpa、秋枫 Bischofi a javanica、樟 Cinnamomum camphora 和雅榕 Ficus concinna 等 5 株典型高
龄古树衰弱株的抽样调查得知：1）5 株衰弱古树的绿叶与凋落叶养分含量（N、P、K、Ca、Mg、S）与
健康株相比，养分含量较低且各具差异性；2）除樟树外其余 4 株古树土壤养分含量（全 N、全 P、全 K、
碱解 N、有效 P、有效 K）均处于缺乏水平。3）抽样调查证实了土壤重金属超标，可能会加剧一些古树
的衰老。古树的精准复壮方案应按照不同衰弱树种营养元素含量水平制定，采取相应措施，如给古树补
充相应的营养液、施加有机肥、更换肥土等，同时防控土壤重金属污染。 |
| 关键词: 衰弱古树 叶片养分 土壤养分 土壤重金属 |
| DOI： |
| 分类号: |
| 基金项目:广东省林业科技创新项目（2020KJCX004） |
|
| Research on Accurate Rejuvenation Technology of Ancient Trees Based on Leaf and Soil Analysis: A Case Study of Typical Weakened Ancient Trees in Northern Guangdong |
|
Wei Dan1, ZHANG Geng1, YANG Zuobing2, HUANG Huayi3
|
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1.Guangdong Provincial Key Laboratory or Silviculture, Protection and Utilization/Guangdong Academy of Forestry;2.Guangdong Forestry Survey and Planning Institute;3.Guangdong Academy of Forestry
|
| Abstract: |
| To develop scientific measures for the rejuvenation of weakened ancient trees, it is necessary
to first understand the causes behind their debilitation. This involves determining and analyzing the nutrient
content, soil nutrient content, and heavy metal levels of both green and fallen leaves. In our study, we conducted
a sampling survey of five typical ancient tree species, namely Castanopsis sclerophylla, Ficus microcarpa,
Bischofi a javanica, Cinnamomum camphora, and Ficus concinna, in northern Guangdong. Our fi ndings indicate
that: 1)The nutrient content(N, P, K, Ca, Mg, S) of green and fallen leaves of the fi ve weakened ancient trees was
lower and diff erent than that of healthy plants. 2)The soil nutrient content(total N, total P, total K, alkaline N,
available P, and available K) of four out of the fi ve ancient trees, except Cinnamomum camphora, was defi cient.
3)Our sampling surveys confi rmed that soil heavy metal levels exceeded the standard, which may accelerate the aging process of some ancient trees. Therefore, in order to create precise rejuvenation plans for diff erent weakened
ancient tree species, it is important to consider their individual nutrient content levels. Corresponding measures
should be taken, such as supplementing ancient trees with nutrient solutions, applying organic fertilizer, replacing
fertilized soil, and preventing and controlling soil heavy metal pollution. |
| Key words: ancient trees leaf nutrient soil nutrient soil heavy metals |
