Effects of Ecological Management on Characteristics of Soil Carbon, Nitrogen, Phosphorus and Their Stoichiometry in Loess Hilly Region, China

LI Zhanbin; ZHOU Bo; MA Tiantian; KE Haocheng; XU Guoce; ZHANG Yi; YU Kunxia; CHENG Yuting

doi:10.13870/j.cnki.stbcxb.2017.06.049

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Effects of Ecological Management on Characteristics of Soil Carbon, Nitrogen, Phosphorus and Their Stoichiometry in Loess Hilly Region, China

更新时间：2025-03-12

- Effects of Ecological Management on Characteristics of Soil Carbon, Nitrogen, Phosphorus and Their Stoichiometry in Loess Hilly Region, China
- Vol. 31, Issue 6, Pages: 312-318(2017)
- 作者机构：
  
  西安理工大学，西北旱区生态水利工程国家重点实验室培育基地,西安,710048
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2017.06.049
  CLC： S153;S157.2
- Published：2017
- 稿件说明：
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LI Zhanbin, ZHOU Bo, MA Tiantian, et al. Effects of Ecological Management on Characteristics of Soil Carbon, Nitrogen, Phosphorus and Their Stoichiometry in Loess Hilly Region, China[J]. 2017, 31(6): 312-318.
DOI：

LI Zhanbin, ZHOU Bo, MA Tiantian, et al. Effects of Ecological Management on Characteristics of Soil Carbon, Nitrogen, Phosphorus and Their Stoichiometry in Loess Hilly Region, China[J]. 2017, 31(6): 312-318. DOI： 10.13870/j.cnki.stbcxb.2017.06.049.

摘要

为了探究不同生态治理措施对土壤碳（C）、氮（N）、磷（P）含量及其化学计量特征的影响，为黄土丘陵区的生态治理与植被恢复提供科学依据，以黄土丘陵区典型小流域王茂沟为例，通过野外采样与室内分析相结合的方法，对研究区坡耕地、林地、草地、灌木地及梯田等5个样地0—100 cm土壤样品的C、N、P及其化学计量比进行了分析研究。结果表明：（1）坡耕地经过生态治理转变为林地、草地、灌木地及梯田等生态用地，土壤C、N含量分别提高了1.27，1.18，1.24，1.14倍及1.64，1.64，1.76，1.57倍；土壤C和N呈极显著的正相关关系；在0—100 cm土层，林地、草地、灌木地及梯田的土壤C、N分布规律一致，均随土壤深度增加而减小，且在0—20 cm土层出现了富集现象，而土壤P含量分布比较均匀；（2）坡耕地C∶N均值显著大于其他样地（P＜0.05），在0—20 cm土层，土壤C∶P与N∶P表现为林地、草地、灌木地及梯田显著高于坡耕地（P＜0.05）；土壤C∶N随着土层深度的变化不显著，C∶P与N∶P随土层加深呈减小的趋势；（3）土壤C、N、P化学计量比的分布主要由土壤C、N决定；土壤C∶P、N∶P与土壤中铵态氮、粘粒、砂粒、水稳性大团聚体含量之间的相关性均通过了显著性检验（P＜0.05）。土壤C、N、P及其化学计量比不仅受生态治理和土层深度的影响，还与土壤理化性质相关，土壤C∶N、C∶P、N∶P可以指示土壤的肥力状况。

Abstract

In order to explore the effects of different ecological management measures on soil carbon (C)

nitrogen (N)

phosphorus (P) content and their stoichiometry characteristics

thus to provide scientific evidence for ecological management and vegetation restoration of loess hilly region

by combining the means of field sampling and laboratory analysis

Wangmaogou which was the typical watershed in loess hilly region was taken as an example in this study

and the soil C

N and P contents and their stoichiometry of the 0—100 cm soil layer of 5 kinds of sample plots (sloping farmland

woodland

shrub land

grassland and terrace land) were analyzed. The results showed that: (1) Transformed into woodland

shrub land

grassland and terrace land by ecological management measures

soil C and N contents of sloping farmland respectively increased by 1.27

1.18

1.24

1.14 times and 1.64

1.64

1.76

1.57 times; There were significant positive correlation between soil C and N. The vertical distribution of the soil C and N in the 0—100 cm soil profile of woodland

grassland

shrub land and terrace land were quite consistent

showing the same trend of decreasing with soil depth and both appearing enrichment phenomenon in the 0—20 cm soil layer

while soil P did not change much with soil depth. (2) Soil C∶N mean value of sloping farmland was significantly higher than that of other plots (P＜0.05)

while the surface soil C∶P of sloping farmland was significantly lower than that of other plots (P＜0.05). Soil C∶N did not change much

while soil C∶P and N∶P showed the trend of decreasing with soil depth. (3) The distribution of soil C

N and P stoichiometry was mainly determined by soil C and N. The correlations of soil C∶P

N∶P and ammonium nitrogen contents

soil clay contents

soil sand contents

soil water-stable aggregates were significant（P＜0.05）. Soil C

P contents and their stoichiometry were not only affected by ecological management and soil depth

but also were relevant to soil physical and chemical properties

meanwhile soil C∶N

C∶P and N∶P could indicate soil fertility level.

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