欢迎访问林草资源研究

林草资源研究 ›› 2023›› Issue (6): 113-119.doi: 10.13466/j.cnki.lczyyj.2023.06.014

• 技术应用 • 上一篇    下一篇

不同林龄无瓣海桑人工林土壤生态化学计量特征

李莉(), 吴悦宏, 肖泽鑫(), 纪燕玲, 林文欢, 朱晓武, 范镇贞   

  1. 汕头市林业科学研究所,广东 汕头 515041
  • 收稿日期:2023-09-04 修回日期:2023-11-24 出版日期:2023-12-28 发布日期:2024-02-21
  • 通讯作者: 肖泽鑫,研究员,主要研究方向:园林及红树林研究。Email:411196796@qq.com
  • 作者简介:李莉,高级工程师,主要研究方向:红树林研究。Email:378949341@qq.com
  • 基金资助:
    广东省科技专项资金项目“粤东地区红树林资源调查研究”(210729106900480);广东省科技创新战略专项项目“粤东地区红树林无瓣海桑林改造试验研究”(STKJ202209062)

Characterization of Soil Ecological Stoichiometry in Plantation Forests of Different Stand Ages of Sonneratia apetala

LI Li(), WU Yuehong, XIAO Zexin(), JI Yanling, LIN Wenhuan, ZHU Xiaowu, FAN Zhenzhen   

  1. Shantou Forestry Science Research Institute,Shantou,Guangdong 515041,China
  • Received:2023-09-04 Revised:2023-11-24 Online:2023-12-28 Published:2024-02-21

摘要:

为探究不同林龄无瓣海桑林土壤养分及其生态化学计量特征变化,通过测定10,15,22 a共3个林龄无瓣海桑林0~30 cm土层土壤的pH值、含盐量(TDS)、有机碳(SOC)、全氮(TN)、碱解氮(AN)、全磷(TP)、有效磷(AP)、全钾(TK)和速效钾(AK)含量,计算化学计量比,并分析各指标间的相关性。结果表明:1)造林后,土壤pH值表现为先上升后下降,土壤养分明显增加,土壤SOC,TN含量高于全国土壤平均水平,TP含量略低于全国土壤平均水平;2)不同林龄土壤理化性质及生态化学计量比均存在显著差异,随林龄的增加,土壤pH值先增加后降低,SOC,TN,AN,TP和AK含量先降低后增加,TK和AP变化不明显;3)无瓣海桑林的生长发育可能受到氮(N)的限制,尤其是林龄幼中期影响较大。无瓣海桑人工林对红树林湿地土壤养分的恢复具有明显的调节作用。

关键词: 粤东地区, 无瓣海桑, 不同林龄, 土壤养分, 生态化学计量

Abstract:

To investigate the changes in soil physicochemical properties and its ecological stoichiometric characteristics in different stand ages,the contents of pH,total dissolved salt (TDS),organic carbon (SOC),total nitrogen (TN),available nitrogen (AN),total phosphorus (TP),available phosphorus (AP),total potassium (TK),and available potassium (AK)of the 0~30 cm soil layer of three stand ages of 10,15,and 22 a were measured,the stoichiometric ratios were calculated,and the correlation between each index was analyzed.The results showed that:1)After afforestation,soil pH showed a decrease followed by an increase and then a decrease,soil nutrients increased significantly,SOC and TN were higher than the national soil average,and TP was slightly lower than the national soil average,indicating that the soil C and N content in the study area was relatively high;2)there were significant differences in soil physicochemical properties and ecological stoichiometric ratios among different stand ages;with the increase of stand age,soil pH increased and then decreased,SOC,TN,AN,TP and AK contents decreased and then increased,and the changes of TK and AP were not obvious;3)The growth and development of Sonneratia apetala forest may be limited by N,especially in the period of young and middle stand age.The plantation of Sonneratia apetala forest had a significant regulatory effect on the restoration of soil nutrients in mangrove wetlands.

Key words: eastern Guangdong, Sonneratia apetala, different stand ages, soil nutrients, ecological stoichiometry

中图分类号: