Response and Recovery of Pinus Massoniana Populations to Drought in Erosion Zone of Changting County, Fujian Province

Li Tian; Cui Yujie; Huang Jinlu; Quan Cheng; Teng Yu; Li Shouzhong

doi:10.13961/j.cnki.stbctb.2022.04.006

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Response and Recovery of Pinus Massoniana Populations to Drought in Erosion Zone of Changting County, Fujian Province

- Response and Recovery of Pinus Massoniana Populations to Drought in Erosion Zone of Changting County, Fujian Province
- Bulletin of Soiland Water Conservation Vol. 42, Issue 4, Pages: 42-48(2022)
- 作者机构：
  
  1. 福建师范大学地理科学学院,福建,福州,350007
  2. 福建师范大学湿润亚热带山地生态国家重点实验室培育基地,福建,福州,350007
  3. 地理学国家级试验教学示范中心(福建师范大学),福建,福州,350007
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2022.04.006
  CLC： S761.1
- Published：2022
- 稿件说明：
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Li Tian, Cui Yujie, Huang Jinlu, et al. Response and Recovery of Pinus Massoniana Populations to Drought in Erosion Zone of Changting County, Fujian Province[J]. Bulletin of Soiland Water Conservation, 2022, 42(4): 42-48.
DOI：

Li Tian, Cui Yujie, Huang Jinlu, et al. Response and Recovery of Pinus Massoniana Populations to Drought in Erosion Zone of Changting County, Fujian Province[J]. Bulletin of Soiland Water Conservation, 2022, 42(4): 42-48. DOI： 10.13961/j.cnki.stbctb.2022.04.006.

摘要

[目的] 探究福建省长汀县水土流失区先锋树种马尾松对干旱的响应与后续恢复，为该区植被恢复与重建工作提供科学支持。[方法] 选择在长汀县河田镇的严重退化地，建立30 m×30 m的种群监测样方，测量样方内所有马尾松个体基径、树高和繁殖情况。借助存活生长函数与繁殖函数计算2016—2020年的马尾松各生命率变化情况，并结合标准化降水蒸散指数(SPEI)计算的同期年度SPEI指数进行分析讨论。[结果] ①长汀县水土流失区发生年度干旱时，马尾松各生命率响应明显。个体生长量减少，存活率下降，此时繁殖径级提前，小径级马尾松繁殖概率增加，马尾松为维持种群存在对策调整； ②长汀县水土流失区进入恢复期后，小个体生长量增加，存活率逐渐增加，繁殖概率先增加后减少。大径级个体各生命率均逐渐回升，恢复速度相对较快，但所有个体均未恢复至干旱发生前状态。[结论] 严重退化地马尾松种群对干旱的响应程度较高，各个生命率(存活、生长和繁殖)变化较快，但种群的恢复能力较差。

Abstract

[Objective] The response of the pioneer tree species Pinus massoniana to drought and subsequent recovery in the erosion zone of Changting County

Fujian Province was determined in order to provide scientific support for the recovery and reconstruction of vegetation in this zone.[Methods] A 30 m×30 m population-monitoring sample area was selected in a severely degraded site in Hetian Town

Changting County. The basal diameter

tree height

and reproduction of each P. massoniana tree within the sample area were measured. The life rate changes for P. massoniana during 2016-2020 were calculated with the help of a survival growth function and a reproduction function

and analyzed and discussed with regard to the annual standardized precipitation evapotranspiraton index (SPEI) calculated for the same period.[Results] ① When drought occurred in the erosion area of Changting County

the response of each life rate for P. massoniana was obvious. Individual tree growth and survival rate decreased. At this time

the reproductive diameter class advanced

the probability of reproduction of small-sized trees increased. P. massoniana adjusted responses to maintain the existence of the population; ② After the erosion area entered the recovery period

the growth of small-sized trees increased

survival rate gradually increased

and the probability of reproduction first increased and then decreased. Each life rate of large-sized trees gradually rebounded

and the recovery rate was relatively fast. However

all individual trees did not recover to the state that existed before the drought occurred.[Conclusion] Severely degraded populations of P. massoniana has responded to drought to a high degree

and each life rate (survival

growth

and reproduction) changes rapidly

but the recovery ability of the tree population is poor.

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