川西北高寒沙地不同年限高山柳土壤生态化学计量及储量变化特征

doi:10.11686/cyxb2017414

草业学报 ›› 2018, Vol. 27 ›› Issue (4): 27-33.DOI: 10.11686/cyxb2017414

川西北高寒沙地不同年限高山柳土壤生态化学计量及储量变化特征

何佳¹,胡玉福^1,*,舒向阳¹,王琴¹,贾安都¹,严星¹

四川农业大学资源学院,四川成都 611130

收稿日期:2017-10-09 修回日期:2017-11-28 出版日期:2018-04-20 发布日期:2018-04-20
通讯作者: *, E-mail: huyufu@sicau.edu.cn
作者简介:何佳(1997-),女,四川绵阳人,在读本科。E-mail:HEJiasicau@yeah.net
基金资助:
国家自然基金面上项目(41771552),国家科技支撑计划项目(2015BAC05B01)和国家级大学生创新创业训练计划项目(201710626035)资助

Effect of Salix cupularis plantations on soil stoichiometry and stocks in the alpine-cold desert of northwestern Sichuan

HE Jia¹, HU Yu-fu^{1, *}, SHU Xiang-yang¹, WANG Qin¹, JIA An-du¹, YAN Xing¹

College of Resources, Sichuan Agricultural University, Chengdu 611130, China

Received:2017-10-09 Revised:2017-11-28 Online:2018-04-20 Published:2018-04-20

摘要/Abstract

摘要： 以川西北高寒沙地6,18和34年高山柳为研究对象,探究其林下C, N, P生态化学计量变化特征。结果表明,随着种植年限增加,0~60 cm土层土壤C∶N∶P呈上升趋势。其中,20~40 cm和40~60 cm土层C∶N和C∶P呈上升趋势,而N∶P呈显著下降趋势(P<0.05)。随种植年限增加,0~60 cm土层有机碳(SOC)储量呈上升趋势,全氮(TN)、全磷(TP)储量呈下降趋势。其中,0~20 cm土层SOC、TN和TP含量均显著升高(P<0.05)。双因素方差分析结果表明,土层深度显著影响着SOC, TN, TP含量及其化学计量比,种植年限对除TP以外均有显著影响,土层深度×种植年限对除C∶N和TP以外均有显著影响(P<0.01)。研究表明,在生态修复过程中,C、N、P的不平衡输入可能会加强土壤养分的失衡状况。

关键词: 高寒沙地, 高山柳, 碳、氮、磷生态化学计量

Abstract: Based on their different plantation ages, 6, 18 and 24 yr old Salix cupularis plantations in the alpine-cold desert of Northwest Sichuan were selected to explore the nature of ecological stoichiometry changes in C, N and P under S. cupularis. The results showed that the ratio of C∶N∶P increased with plantation age in the 0-60 cm soil layer. Soil C∶N and C∶P increased with plantation age in the 20-40 cm and 40-60 cm soil layers, but the soil N∶P significantly decreased with plantation age (P<0.05). Soil organic carbon (SOC) stock increased with forest development in the 0-60 cm layers, but total N (TN) and total P (TP) stocks showed the opposite trend. SOC, TN and TP significantly increased in the 0-20 cm soil layer (P<0.05). A two-way ANOVA indicated that soil depth, plantation age and soil depth×plantation age significantly affected soil stoichiometric characteristics and stocks (P<0.01). The exceptions were soil TP contents, which did not significantly differ with plantation age, and soil C∶N and P stock, which did not significantly differ by soil depth×plantation age. The results show that imbalances in soil C∶N∶P occurred with plantation aging due to imbalances of C, N and P input.

Key words: alpine-cold desertland, Salix cupularis, C, N, P ecological stoichiometry

何佳,胡玉福,舒向阳,王琴,贾安都,严星. 川西北高寒沙地不同年限高山柳土壤生态化学计量及储量变化特征[J]. 草业学报, 2018, 27(4): 27-33.

HE Jia, HU Yu-fu, SHU Xiang-yang, WANG Qin, JIA An-du, YAN Xing. Effect of Salix cupularis plantations on soil stoichiometry and stocks in the alpine-cold desert of northwestern Sichuan[J]. Acta Prataculturae Sinica, 2018, 27(4): 27-33.

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川西北高寒沙地不同年限高山柳土壤生态化学计量及储量变化特征

Effect of Salix cupularis plantations on soil stoichiometry and stocks in the alpine-cold desert of northwestern Sichuan

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