辽宁北部樟子松人工林土壤养分含量变化研究  

Study on the Change of Soil Nutrient Content in Pinus sylvestris var.mongolica Plantations in Northern Liaoning Province

作　　者：王诗童 王伟 曹宇 Wang Shitong;Wang Wei;Cao Yu(National Forestry and Grassland Administration Survey Planning and Design Institute,Beijing 100714,China;State-owned Changtu Quantou Forest Farm,Tieling 112517,China;Liaoning Research Institute of Sand Land Control and Utilization,Fuxin 123000,China)

机构地区：[1]国家林业和草原局林草调查规划院,北京100714 [2]国有昌图县泉头林场,辽宁铁岭112517 [3]辽宁省沙地治理与利用研究所,辽宁阜新123000

出　　处：《防护林科技》2024年第4期10-13,共4页Protection Forest Science and Technology

基　　金：辽宁省自然科学基金项目(2022-MS-069)。

摘　　要：为了解辽宁北部樟子松人工林土壤养分含量变化情况,以辽宁北部昌图县付家机械林场樟子松人工林土壤为对象,开展不同林龄林分土壤养分状况调查研究。结果表明:不同林龄樟子松人工林土壤碳、氮、磷等养分含量变化存在显著差异,表层(0~10 cm)土壤养分含量普遍高于亚表层(>10~20 cm)土壤。随着樟子松林龄增加,土壤有机碳、全氮显著增加,全磷变化不明显,碱解氮表现为先增加后减少,速效磷含量持续减少,土壤C/N无明显变化规律。表层(0~10 cm)土壤有机碳含量与全氮含量正相关,与碱解氮含量负相关;土壤全氮含量与碱解氮、全磷、速效磷含量负相关。不同林龄林分土壤碳、氮、磷含量存在表层富集现象;随林龄增加,土壤碳、氮养分归还增加,使土壤能够得到有效补充,但土壤磷有效性较低,是限制土壤氮有效转化的因素之一。In order to understand the change of soil nutrient content in Pinus sylvestris var.mongolica plantations in northern Liaoning Province,the soil of Pinus sylvestris var.mongolica plantations in Fujia Mechanical Forest Farm of Changtu County in northern Liaoning Province was taken as the object to investigate and research the soil nutrient status of the stands with different forest ages.The results showed as follows:there were significant differences in the nutrient content changes of soil carbon,nitrogen and phosphorus among Pinus sylvestris var.mongolica plantations with different forest ages,and the nutrient content of surface soil(0-10 cm)was generally higher than that of subsurface soil(>10-20 cm).With the increasing of age of Pinus sylvestris var.mongolica,soil organic carbon and total nitrogen increased significantly,total phosphorus did not change significantly,alkali-hydrolyzed nitrogen increased first and then decreased,available phosphorus content continued to decrease,and there was no significant change in soil C/N.The soil organic carbon content in surface soil(0-10 cm)was positively correlated with total nitrogen content and negatively correlated with alkali-total nitrogen content,and negatively correlated with alkali-hydrolyzable nitrogen;soil total nitrogen content was negatively correlated with alkali-hydrolyzable nitrogen,total phosphorus and available phosphorus content.The contents of soil carbon,nitrogen and phosphorus in the stands with different forest ages were enriched in the surface layer.With the increase of forest age,the return of soil carbon and nitrogen nutrients increased,so that the soil could be effectively supplemented,but the soil phosphorus availability was low,which was one of the factors limiting the effective transformation of soil nitrogen.

关 键 词：樟子松 人工林 土壤养分 含量变化 

分 类 号：S791.253.06[农业科学—林木遗传育种]