辽西两种油松混交林土壤及油松叶片C∶N∶P化学计量特征

生态学杂志

辽西两种油松混交林土壤及油松叶片C∶N∶P化学计量特征

张藤子¹,李亚楠¹,韩飞燕¹,张淞著^1,2,周永斌^1,2*

(¹沈阳农业大学林学院，沈阳 110866；²辽河平原森林生态站，辽宁昌图 112518)

出版日期:2018-10-10 发布日期:2018-10-10

C∶N∶P stoichiometry of Pinus tabuliformis leaf and soil in two mixed stands in western Liaoning Province.

ZHANG Teng-zi¹, LI Ya-nan¹, HAN Fei-yan¹, ZHANG Song-zhu^1,2, ZHOU Yong-bin^1,2*

(¹College of Forestry, Shenyang Agricultural University, Shenyang 110866, China; ²Research Station of LiaoheRiver Plain Forest Ecosystem, Chinese Forest Ecosystem Research Network, Changtu 112518, Liaoning, China).

Online:2018-10-10 Published:2018-10-10

摘要/Abstract

摘要： 为研究混交林对油松生长养分限制因子的影响，选择油松-古栎和油松-柏两种辽西地区典型混交林，以油松纯林为对照，测定油松叶片及土壤C、N、P含量并分析化学计量特征。结果表明：油松蒙古栎混交林改良土壤能力更强，油松-古栎混交林较纯林可显著提高土壤C、N、P含量，同时降低土壤C∶N和C∶P，提高N和P的有效性；油松侧柏混交林对土壤化学计量特征的影响与油松蒙古栎混交林相似，但未达到显著水平；油松纯林叶片N∶P大于16，表明油松生长受到P限制，油松-古栎和油松-柏混交林中油松叶片N∶P分别比降到14.88和14.02，混交改善了P对油松生长的限制；混交并未显著改变油松叶片P浓度，但显著降低了叶片N浓度，且叶片C∶N及N∶P与叶片N浓度间显著相关，表明混交林对油松叶片化学计量改变的原因不仅在于混交改变了土壤P供应，而且在于改变了油松对N的利用效率。

关键词: 掺混肥, 硝化抑制剂, 调控作用, 土壤氮库, 脲酶抑制剂

Abstract: To evaluate the effects of mixed stands on nutrient limitation for Pinus tabuliformis growth,P. tabuliformis-Quercus mongolica and P. tabuliformis-Platycladus orientalis mixed stands in western Liaoning Province were selected and pure P. tabuliformis stand was taken as control. The concentrations of C, N, and P of P. tabuliformisleaves and soil were measured, and stoichiometric characteristics were analyzed. Results showed that P. tabuliformis-Q. mongolica mixed stand had a better capacity of improving soil fertility. P. tabuliformis-Q. mongolicamixed stand significantly increased soil C, N, and P concentrations, and significantly decreased C∶N and C∶P ratios of soil, leading to a higher N and P availability. The effects of P. tabuliformis-P. orientalis mixed stand on soil C∶N∶P stoichiometry were similar to that of P. tabuliformis-Q. mongolicamixed stand, but without statistical significance. N∶P ratio of P. tabuliformis leaf in themonoculture stands was higher than 16, while that under P. tabuliformis-Q. mongolicamixed stand and P. tabuliformis-P. orientalis mixed stand decreased to 14.88 and 14.02, respectively, indicating that the growth ofP. tabuliformisin monoculture was limited by P, which was improved by mixed stands. Foliar P concentration was not altered by both mixed stands; however, N concentration of leaf was decreased. Foliar C∶N and C∶P ratios were significantly associated with foliar N concentration, indicating that P. tabuliformis changed the stoichiometric characteristics of leaf due to that mixing stand improved soil P supply and N use efficiency.

Key words: blended fertilizer, nitrification inhibitor, regulation, soil nitrogen pool, urease inhibitor

张藤子,李亚楠,韩飞燕,张淞著,周永斌. 辽西两种油松混交林土壤及油松叶片C∶N∶P化学计量特征[J]. 生态学杂志.

ZHANG Teng-zi, LI Ya-nan, HAN Fei-yan, ZHANG Song-zhu, ZHOU Yong-bin. C∶N∶P stoichiometry of Pinus tabuliformis leaf and soil in two mixed stands in western Liaoning Province.[J]. cje.

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