Ecological Stoichiometric Characteristics of Leaves and Soil in a Typical

ZHU Chao; WU Liyu; ZHANG Chongqing; WEI Fanjiang; WANG Yanru; MA Yonglin; HE Yuan; YANG Yufeng; JIANG Shimin

doi:10.13870/j.cnki.stbcxb.2021.04.049

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Ecological Stoichiometric Characteristics of Leaves and Soil in a Typical

更新时间：2025-03-12

- Ecological Stoichiometric Characteristics of Leaves and Soil in a Typical
- Vol. 35, Issue 4, Pages: 361-368(2021)
- 作者机构：
  
  1. 甘肃农业大学林学院,兰州,730070
  2. 甘肃省人大机关官山林场,兰州,730070
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2021.04.049
  CLC： S154.1
- Published：2021
- 稿件说明：
移动端阅览
ZHU Chao, WU Liyu, ZHANG Chongqing, et al. Ecological Stoichiometric Characteristics of Leaves and Soil in a Typical[J]. 2021, 35(4): 361-368.
DOI：

ZHU Chao, WU Liyu, ZHANG Chongqing, et al. Ecological Stoichiometric Characteristics of Leaves and Soil in a Typical[J]. 2021, 35(4): 361-368. DOI： 10.13870/j.cnki.stbcxb.2021.04.049.

摘要

通过野外调查和室内分析相结合的方法，以兰州市北山仁寿山省人大官山林场选取人工灌溉下造林年限相同、立地条件相似的侧柏×榆树（S1）、侧柏×山毛桃（S2）、侧柏×山杏（S3）、侧柏×刺槐（S4）、侧柏纯林（S5）为研究对象，探讨土壤和叶片生态化学计量特征及相互关系。结果表明：（1）不同林分侧柏叶片C、N、P含量均表现为S4>S3>S2>S1>S5，各混交林的均大于纯林；侧柏叶片C∶N表现出与C、N、P的含量呈现相反的趋势；N∶P<14，说明该区域植物生长总体上受N元素限制。（2）不同林分土壤C、N、P含量均表现为S4>S3>S2>S1>S5，各混交林的均大于纯林；随土层深度加深而降低，土壤养分"表聚"特征明显；C∶N略高于全国森林土壤的平均水平，C∶P和N∶P均低于全国平均水平，说明该区土壤对植物生长所需的N元素供应不足。（3）相关分析表明，该区域侧柏叶片的C、N、P含量变化和土壤C、N、P含量变化无显著相关性，表明土壤C、N、P供应量对侧柏叶片C、N、P含量影响不大。综上所述，兰州市北山侧柏混交林较侧柏纯林具有更好的固碳能力和养分稳定性，该区植被恢复中应合理营造混交林，以促进养分平衡。

Abstract

Taking Platycladus orientalis×Ulmus pumila forest (S1)

P. orientalis×Prunus davidiana forest (S2)

P. orientalis×Armeniaca sibirica forest (S3)

P. orientalis×Robinia pseudoacacia forest (S4) and P. orientalis forest (S5)

which has same afforestation period and the similar site conditions

in the Guanshan Forest Farm of Renshoushan Province in Beishan of Lanzhou City

as the research object

the ecological stoichiometric characteristics of soil and leaves and their relationship were studied based on field investigation and indoor analysis. The results showed that: (1) The content of C

N and P in the leaves of P. orientalis in different forests followed the order of S4>S3>S2>S1>S5

and the values of mixed forest were all larger than those of pure forests. The value of C∶N in the P. orientalis leaves showed the opposite trend to that of C

N and P content. The value of N∶P less than 14 indicated that plant growth in this area was generally restricted by N elements. (2) The content of soil C

N and P in different forest stands all followed the order of S4>S3>S2>S1>S5

and the values of mixed forests were all larger than those of pure forests. The soil nutrients decreased with the increasing of soil depth

and the "surface accumulation" characteristics of soil nutrients were obvious. C∶N was slightly higher than the national average level of forest soil

and C∶P and N∶P were lower than the national average level

indicating that the soil in this region was insufficient in the supply of N for plant growth. (3) Correlation analysis showed that there is no significant correlation between the changes of C

N and P content in P. orientalis leaves and the changes of C

N and P content of soil in this area

indicating that the supply of soil C

N and P had little effect on C

N and P content of P. orientalis leaves. In conclusion

the P. orientalis mixed forest had better carbon sequestration capacity and nutrient stability than pure P. orientalis forest in Beishan of Lanzhou City. The mixed forests should be constructed reasonably to promote nutrient balance during vegetation restoration in this area.

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