沙地樟子松人工林土壤钾素含量研究

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LEI Zyong，LIUChangWANGuohen，etal.Thevariationofsoilpotassiumcontentanditsinfuencingfactorsinpatationof PinussylvestisogoliddJ]ualoohcalUesityturaiee）4） 10.11956/j.issn.1008-0562.20250048

关键词：土壤钾素；樟子松人工林；林分因子；土壤理化性质；沙地中图分类号：S714.5 文献标志码：A 文章编号：1008-0562（2025）05-0546-08

The variation of soil potassium content and its influencing factors in plantation of Pinus sylvestris var.mongolica in sandy land LEI Zeyong23，LIU Chang'，WANG Guochen4， ZHAO Guojun4， HAN Yangangl1，2， WANG Sainan1， ZHOU Fengyan1，2*

（1.SchoolofEnvironmental Scienceand Engineering，Liaoning Technical University，Fuxin ，China;2.Institute ofDegradedLand EcologicalRemediation，Liaoning TechnicalUniversity，Fuxin123ooo，China;3.FuxinDevelopment Research Institute，Liaoning Technical University，Fuxin 123ooo，China;4.Liaoning Research Institute of Sandyland Control and Utilization，uxin230oo，Chin）

Abstract：To investigate the effects of vegetation recovery on soil potassium content and availability in sandy land，a combinationoffield samplingand laboratoryanalysis was used to studythe distribution characteristics of total potassium（TK）and available potassium （AK） indifferent soil layers of Pinus sylvestris var.mongolica plantations in Zhanggutai，as wellas their relationships with stand and soil factors.Theresultsshowed that soil TKinPinus sylvestris var.mongolica plantations increased slightlywith standage but was not statistically significant，whileTKinlow-densitystands significantlydecreased.Nosignificantdiffrences inAKcontentwere observed among standsof differentagesand densities，butAK exhibitedapronounced aggregationpattern in the 0-10cm surface layer. Stand factors，except for crown width，had no significant influence on AK variations.The （20 0-20cm ， 20-40cm ，and 80-100cm soil layers were positively affected by soil water content， available phosphorus，and total nitrogen，respectively.The results providea scientific basis forsoil fertility management of Pinus sylvestris var. mongolica plantation in sandy land.

Keywords：soil potassium；Pinussylvestris var.mongolica plantation;stand factor；soil physicochemical properties; sandy land

0引言

钾（K）是森林生态系统中极为重要的营养元素之一，广泛分布于植物代谢活跃的器官和组织，并承担多重关键角色。（剩余19597字）