Effects of N Addition on Soil Exchangeable Cations in a Young Keteleeria fortunei var. cyclolepis Forest

IF 1.3 4区环境科学与生态学 Q3 ECOLOGY

Ecoscience Pub Date : 2019-03-31 DOI:10.1080/11956860.2019.1590952

Yong Wang, Xinhao Huang, Yinghong Jiang, Xiongsheng Liu, F. Zhu

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引用次数: 1

Abstract

ABSTRACT The effects of simulated nitrogen (N) addition on soil exchangeable cations were assessed in a young Keteleeria fortunei var. cyclolepis forest in subtropical China. Three N addition schemes with three replications were designed for the forest control (without N addition, CK), low N (5 g N m–2 a–1, L-N) and high N (50 g N m–2 a–1, H-N). Results showed that continuous N addition resulted in increased, although not statistically significant, plant biomass of K. fortunei var. cyclolepis, while it significantly decreased cation exchange capacity (CEC), base saturation (BS) and exchangeable base cations (BCs) (especially Ca2+ and Mg2+ under high N addition). General soil properties (except total P) were significantly affected by high N addition compared with the control. High N addition significantly increased the concentration of foliar N, and decreased the concentrations of foliar P, Ca2+ and Mg2+. Soil pH was also significantly altered by increased N addition, indicating that N addition significantly accelerated soil acidification. This study found that N addition was negatively correlated with soil pH, CEC and Ca2+, and that loss of BCs might be related to increased NO3–.

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施氮对江南油杉幼林土壤交换阳离子的影响

以亚热带江南油杉幼林为研究对象，研究了模拟氮素添加对土壤交换阳离子的影响。设计了3个重复的3个施氮方案，分别为森林对照(不施氮，CK)、低施氮(5 g N m-2 a-1, L-N)和高施氮(50 g N m-2 a-1, H-N)。结果表明，连续施氮可显著提高金莲的生物量，但不具有统计学意义，但显著降低阳离子交换容量(CEC)、碱饱和度(BS)和碱交换阳离子(BCs)(特别是高施氮条件下的Ca2+和Mg2+)。与对照相比，高施氮对土壤的一般性质(除全磷外)有显著影响。高N添加显著提高了叶片N浓度，降低了叶片P、Ca2+和Mg2+浓度。施氮量的增加也显著改变了土壤pH值，表明施氮显著加速了土壤酸化。本研究发现N添加量与土壤pH、CEC和Ca2+呈负相关，BCs的损失可能与NO3 -的增加有关。

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来源期刊

Ecoscience 环境科学-生态学

CiteScore

2.80

自引率

0.00%

发文量

审稿时长

>36 weeks

期刊介绍： Écoscience, is a multidisciplinary journal that covers all aspects of ecology. The journal welcomes submissions in English or French and publishes original work focusing on patterns and processes at various temporal and spatial scales across different levels of biological organization. Articles include original research, brief communications and reviews.