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1.榆林市林业工作站, 陕西 榆林 719000
2.西北农林科技大学;林学院, 陕西 杨凌 712100
3.榆林学院 现代农学院, 陕西 榆林 719000
Received:30 March 2025,
Revised:2025-06-16,
Published:10 October 2025
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曹东平, 高艳波, 陈富彩, 等.陕西省子洲县5种人工林类型不同土层土壤养分及化学计量学特征[J].水土保持通报,2025,45(5):72-80.
Cao Dongping, Gao Yanbo, Chen Fucai, et al. Soil nutrients and stoichiometric characteristics in different soil layers of five artificial forest types in Zizhou County, Shaanxi Province [J]. Bulletin of Soil and Water Conservation,2025,45(5):72-80.
曹东平, 高艳波, 陈富彩, 等.陕西省子洲县5种人工林类型不同土层土壤养分及化学计量学特征[J].水土保持通报,2025,45(5):72-80. DOI: 10.13961/j.cnki.stbctb.2025.05.019. CSTR: 32312.14.stbctb. 2025.05.019..
Cao Dongping, Gao Yanbo, Chen Fucai, et al. Soil nutrients and stoichiometric characteristics in different soil layers of five artificial forest types in Zizhou County, Shaanxi Province [J]. Bulletin of Soil and Water Conservation,2025,45(5):72-80. DOI: 10.13961/j.cnki.stbctb.2025.05.019. CSTR: 32312.14.stbctb. 2025.05.019..
目的
2
探究陕西省子洲县不同类型人工林土壤养分及化学计量特征,为该区生态治理修复提供科学依据。
方法
2
以子洲县5种典型人工林(油松纯林、侧柏纯林、刺槐纯林、山杏侧柏混交林和刺槐山杏混交林)为研究对象,以自然草地作为对照,研究不同林分类型0—100 cm土层不同深度土壤的有机碳(SOC)、全氮(TN)和全磷(TP)含量及生态化学计量特征。
结果
2
5种人工林土壤C,N,P含量的变化范围分别为4.56~3.31 g/kg,0.29~0.23 g/kg,0.58~0.55 g/kg。在0—100 cm土层中C,N,P含量均表现为山杏侧柏混交林最高,且与其余林分类型呈现显著差异。土壤C,N含量呈现出随着土层深度的增加而降低的趋势。混交林各土层TN含量大于纯林;除60—80 cm和80—100 cm土层外,其余土层SOC和TP含量均表现为山杏侧柏混交林最高。5种人工林土壤C∶P,C∶N,N∶P变化范围分别为7.75~5.69,16.30~14.14,0.50~0.40。各土层C∶P均表现为侧柏纯林最低;而N∶P则表现为:混交林>纯林。不同林分类型中土壤TN和SOC均与N∶P呈显著正相关,而在不同土层深度下TN和SOC则与C∶P和N∶P呈显著正相关。
结论
2
土壤养分和土壤化学计量特征在不同人工林类型间呈现显著差异,整体来看山杏侧柏混交林土壤养分和土壤化学计量高于其余林分类型,因此营造混交林能够提高林分生产力和稳定性。
Objective
2
The soil nutrients and stoichiometric characteristics of different artificial forest types in Zizhou County, Shaanxi Province were analyzed, in order to provide a scientific basis for ecological management and restoration in the region.
Methods
2
Five representative artificial forest types in Zizhou County (
Pinus tabuliformis
pure forest,
Platycladus orientalis
pure forest,
Robinia pseudoacacia
pure forest,
Prunus armeniaca
×
P. orientalis
mixed forest, and
R. pseudoacacia
×
P. armeniaca
mixed forest) were selected as the study objects, with natural grassland as the control. The contents of soil organic carbon (SOC), total nitrogen (TN), and total phosphorus (TP) as well as their ecological stoichiometric characteristics of different soil layers (0—100 cm) under different forest stand types were investigated.
Results
2
The ranges of soil C, N, and P contents under five artificial forest types were 4.56—3.31 g/kg, 0.29—0.23 g/kg, and 0.58—0.55 g/kg, respectively. Within the 0—100 cm soil profile, the
P. armeniaca
×
P. orientalis
mixed forest showed the highest C, N, and P contents, with significant differences compared to other forest stand types. Both soil C and N contents exhibited decreasing trends with increasing soil depth. The TN content in mixed forests was higher than that in the pure forests of all soil layers. The SOC and TP contents in all soil layers except the 60—80 cm and 80—100 cm layers were highest in the
P. armeniaca
×
P. orientalis
mixed forest. The variation ranges of C∶P, C∶N, and N∶P in soil of the five artificial forest types were 7.75—5.69, 16.30—14.14, and 0.50—0.40, respectively. For all soil layers, C∶P ratios were the lowest in the pure forest of
P. orientalis
, while N∶P ratios were higher in mixed forests than in pure forests. TN and SOC were significantly positively correlated with N∶P in different forest stand types, and they were significantly positively correlated with both C∶P and N∶P at different soil depths.
Conclusion
2
Soil nutrients and stoichiometric characteristics differ significantly of different artificial forest types. Overall, the
P. armeniaca
×
P. orientalis
mixed forest demonstrates superior soil nutrient level and stoi
chiometric characteristics compared to other forest stand types. These findings indicate that mixed forests can enhance forest stand productivity and stability.
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