浙西南低山丘陵区林分类型对土壤碳氮磷化学计量特征的影响

周方; 叶兰华; 童冉; 彭辉; 朱念福; 楼晨阳; 苗永朝; 吴统贵; 沈庆华

doi:10.12302/j.issn.1000-2006.202402017

周方, 叶兰华, 童冉, 彭辉, 朱念福, 楼晨阳, 苗永朝, 吴统贵, 沈庆华

南京林业大学学报（自然科学版） ›› 2025, Vol. 49 ›› Issue (5) : 29-37.

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南京林业大学学报（自然科学版） ›› 2025, Vol. 49 ›› Issue (5) : 29-37. DOI: 10.12302/j.issn.1000-2006.202402017

专题报道：土壤碳汇与养分元素循环利用研究（执行主编　张金池　薛建辉　阮宏华）

浙西南低山丘陵区林分类型对土壤碳氮磷化学计量特征的影响

周方 ¹^,² ,
叶兰华 ³ ,
童冉 ¹ ,
彭辉 ³ ,
朱念福 ¹ ,
楼晨阳 ¹ ,
苗永朝 ¹ ,
吴统贵 ¹ ,
沈庆华 ³^,^*

作者信息 +

Impacts of forest stand types on the stoichiometric characteristics of soil carbon,nitrogen, and phosphorus in low hilly region of southwest Zhejiang Province

ZHOU Fang ¹^,² ,
YE Lanhua ³ ,
TONG Ran ¹ ,
PENG Hui ³ ,
ZHU Nianfu ¹ ,
LOU Chenyang ¹ ,
MIAO Yongzhao ¹ ,
WU Tonggui ¹ ,
SHEN Qinghua ³^,^*

Author information +

文章历史 +

摘要

【目的】南方低山丘陵区是我国亚热带森林重要分布区,探究该区典型林分类型土壤碳、氮、磷化学计量特征及其影响因素,为南方低山丘陵区土壤肥力评估和施肥计划制定等提供理论依据。【方法】以浙西南低山丘陵区杉木(Cunninghamia lanceolata)林、马尾松(Pinus massoniana)林、杉木×马尾松混交林和杉木×毛竹(Phyllostachys edulis)混交林等林分的土壤为研究对象,分析土壤有机碳(SOC)、全氮(TN)、全磷(TP)质量分数及化学计量比对林分类型、土层深度、土壤有效养分的响应规律,以及化学计量特征间相关性、全量养分质量分数间的异速增长关系等。【结果】①0~40 cm土层的土壤TN、TP质量分数在4种林分类型间差异显著,平均值分别为1.20和0.19 g/kg,均为杉木×毛竹混交林土壤中最高;土壤碳氮比(表示为C/N)和碳磷比(C/P)的平均值分别为17.20和106.53,杉木×毛竹混交林土壤C/N和C/P均显著低于杉木林和杉木×马尾松混交林。②随着土层加深,整体及各林分类型土壤SOC与TN、TP质量分数均表现出减少的趋势,而土壤C/N和氮磷比(N/P)则分别表现出增加和减少的趋势。③相关性分析表明,土壤SOC与TN、TP质量分数及相关化学计量比之间均呈显著正相关,土壤TN和TP质量分数之间呈显著正相关;标准化主轴分析表明,土壤TP质量分数增长速率略低于TN,而显著低于SOC;冗余分析表明,土壤pH对C/P起到负向调控作用,土壤水解氮对TN、TP质量分数及化学计量比起到显著调控作用。【结论】浙西南低山丘陵区林分类型对土壤碳和养分质量分数及化学计量比影响显著,杉木×毛竹混交林可能通过减轻土壤酸化等途径对土壤养分状况起到一定的改善效果。

Abstract

【Objective】The low hilly region of south China constitutes critical distribution areas for subtropical forests. This study investigates the stoichiometric characteristics of soil carbon, nitrogen, and phosphorus under typical stand types in these regions, as well as their influencing factors, to provide a theoretical foundation for soil fertility assessment and fertilization planning in the southern low hilly regions. 【Method】This study focused on soils from four stand types in the low hilly region of southwestern Zhejiang Province, including Cunninghamia lanceolata forest, Pinus massoniana forest, C. lanceolata and P. massoniama mixed forest, and C. lanceolata and P. edulis mixed forest. We systematically analyzed the response patterns of soil organic carbon (SOC), total nitrogen (TN), and total phosphorus (TP) mass fractions, as well as their stoichiometric ratios (C/N, C/P, N/P), to stand type, soil depth, and available nutrients. Additionally, correlations among stoichiometric characteristics and allometric growth relationships between total nutrient mass fractions were investigated. 【Result】(1) In the 0-40 cm soil layer, soil TN and TP mass fraction exhibited statistically significant differences among the four stand types, with mean values of 1.20 and 0.19 g/kg, respectively. Both soil TN and TP reached their highest level in the C. lanceolata and P. edulis mixed forest. The mean values of the ratio of SOC to TN (C/N, mass fraction ratio, the same below) and the ratio of SOC to TP (C/P) in soil were 17.20 and 106.53, respectively. The soil C/N and C/P ratios in the C. lanceolata and P. edulis mixed forest were significantly lower than those in C. lanceolata forest and C. lanceolata and P. massoniama mixed forest. (2) With increasing soil depth, the mass fraction of soil SOC, TN, and TP exhibited a declining trend both in the aggregated dataset and within each individual stand type. In contrast, the soil C/N displayed an upward trend, while the nitrogen-to-phosphorus ratio (N/P) showed declining trend with depth. (3) Correlation analysis demonstrated significant positive correlations between soil SOC, TN, and TP mass fractions, as well as their associated stoichiometric ratios. Additionally, a significant positive correlation was identified between TN and TP mass fractions. Standardized major axis analysis demonstrated that the accumulation rate of soil TP mass fraction was slightly lower than that of TN, while being significantly lower than that of SOC. Redundancy analysis indicated that soil pH exerted a negative regulatory effect on the C/P ratio, while soil hydrolysable nitrogen significantly modulated both the mass fractions of TN and TP and their stoichiometric ratios. 【Conclusion】Stand types in the low hilly region of western Zhejiang have significant effects on soil carbon and nutrient mass fractions and stoichiometric ratios. The C. lanceolata and P. edulis mixed forest may improve soil nutrient status by reducing soil acidification and other apporoaches.

导出引用

周方, 叶兰华, 童冉, 等. 浙西南低山丘陵区林分类型对土壤碳氮磷化学计量特征的影响[J]. 南京林业大学学报（自然科学版）. 2025, 49(5): 29-37 https://doi.org/10.12302/j.issn.1000-2006.202402017

ZHOU Fang, YE Lanhua, TONG Ran, et al. Impacts of forest stand types on the stoichiometric characteristics of soil carbon,nitrogen, and phosphorus in low hilly region of southwest Zhejiang Province[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2025, 49(5): 29-37 https://doi.org/10.12302/j.issn.1000-2006.202402017

中图分类号： S718.5;S154.1

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