|Table of Contents|

Stoichiometric characteristics of carbon, nitrogen and phosphorus in leaf-litter-soil of Pinus yunnanensis forest during different restoration stages in karst plateau of eastern Yunnan(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2022 04
Page:
1-10
Research Field:
Articles
Publishing date:

Info

Title:
Stoichiometric characteristics of carbon, nitrogen and phosphorus in leaf-litter-soil of Pinus yunnanensis forest during different restoration stages in karst plateau of eastern Yunnan
Author(s):
CHEN Peiyun1 2 FAN Tao1 2** HE Ting1 2& HU Honghong1 2
1 Faculty of Geography, Yunnan Normal University, Kunming 650500, China
2Yunnan Key Laboratory of Plateau Geographical Process and Environmental Change, Kunming 650500, China
Keywords:
leaf-litter-soil stoichiometric characteristics influence factor Pinus yunnanensis eastern Yunnan plateau
CLC:
-
PACS:
DOI:
10.19675/j.cnki.1006-687x.2021.03016
DocumentCode:

Abstract:
Taking Pinus yunnanensis forests (pure forests, artificial mixed forests, natural secondary forests) at different stages of restoration on karst slopes in eastern Yunnan as the research objects, and Castanopsis orthacantha primary forest and Myrsine africana shrub as reference plots. The characteristics of C, N, P content and stoichiometric ratio in the leaf-litter-soil of the five types of forest are studied. The conclusion obtained are as follows: (1) The three Pinus yunnanensis forests all present a pattern of high C (432.27 g/kg), low N (10.28 g/kg), and P (0.96 g/kg). T he contents of C, N and P in leaf-litter-soil of the five forest types from high to low are basically as follows: leaf > litter > soil, while the values of C/N, C/P and N/P from high to low are as follows: litter > leaf > soil. The nutrient contents and stoichiometric ratios of leaves and litter are significantly different from the soil.(2) The nutrient absorption and assimilation capacity of the three Pinus yunnanensis forests has little difference, but the natural secondary forests have the best litter quality, and the artificial mixed forests have the highest soil N and P availability. The Pinus yunnanensis forests are more stressed by N than Primary forests and shrubs .(3) Plant leaf-litter-soil C, N, P and their stoichiometric ratios have significant correlations, and the mutual feedback mechanism is obvious. The stoichiometric characteristics of soil C, N, P in the study area are significantly affected by soil pH, aggregate particles, water content, volume-weight and nitrate nitrogen. The vegetation restoration of P. yunnanensis in the karst plateau of eastern Yunnan is mainly affected by N stress, and it is the key factor for vegetation restoration and management of P. yunnanensis to improve the nutrient backflow of litter.

References

-

Memo

Memo:
-
Last Update: 2021-09-08