白龙江流域不同林龄人工油松林土壤养分含量变化研究  

Characteristics of Soil Nutrients in Pinus tabulaeformis Plantation at Different Ages

作　　者：丁全定 黄石 齐昊 杨静 林媛 DING Quan-ding;HUANG Shi;QI Hao;YANG Jing;LIN Yuan(Institute of Forestry Science of Bailongjiang River in Gansu Province,Lanzhou,Gansu 730046;Gansu Bailongjiang National Forest Ecosystem Research Station,Zhouqu,Gansu 746300;Gansu province lanzhou beishan ecological construction management center ZuLiHe forest farm,Gansu,Huining 730722)

机构地区：[1]甘肃省白龙江林业科学研究所,兰州730046 [2]甘肃白龙江森林生态系统国家定位观测研究站,甘肃舟曲746300 [3]甘肃省兰州北山生态建设管护中心祖厉河林场,甘肃会宁730722

出　　处：《陕西林业科技》2022年第4期11-14,共4页Shaanxi Forest Science and Technology

基　　金：甘肃省科技厅自然科学基金项目(17JR5RA058);甘肃省林业草原科技项目(2015kj047,2019kj074)。

摘　　要：为准确了解白龙江流域人工油松林尤其是进入成熟期以后的人工油松林土壤养分状况和动态,给林地抚育管理和利用提供依据,以迭部林区不同林龄(35、40、45、50、55 a)人工油松林土壤作为研究对象,对0~20、20~40 cm层土壤有机质、全氮、碱解氮、全磷、速效磷和pH值等6个与土壤养分有关的指标进行了测定。结果表明:林龄35~55 a的人工油松林土壤养分含量0~20 cm层显著高于20~40 cm层,随着树龄增加,土壤有机质含量、pH值呈先上升后下降趋势;碱解氮随着树龄增加而增加,与全氮含量不呈直线相关;速效磷含量随着树龄增长而略有增长,但其含量极低。为改善进入成熟期之后的人工油松林土壤养分状况,应营造油松混交林,施入磷肥,改良土壤养分结构。The soil of Pinus tabulaeformis plantations with different ages(35,40,45,50 and 55 years old)in Diebu Forest region was studied,the content of organic matter,total nitrogen,alkali-hydrolyzed nitrogen,total phosphorus,available phosphorus and pH in soil depths of 0-20 cm and 20-40 cm were determined.The result showed that with the increase of tree age,the content of soil organic matter and pH increased at first and then decreased,the content of available phosphorus increased slightly,and that the content of available nitrogen did not show a linear correlation with the content of total nitrogen,but the content of available phosphorus increased slightly with the increase of tree age.It is concluded that in order to improve soil nutrients,a mixed forest of Pinus tabulaeformis should be considered,together with phosphorus fertilizer application.

关 键 词：人工林 油松林 林龄 土壤养分 白龙江流域 

分 类 号：S791.254.06[农业科学—林木遗传育种]