摘要
文章基于T1:50±20 mg/kg、T2:100±20 mg/kg、T3:200±30 mg/kg、T4:300±30 mg/kg 4个铵态氮含量梯度,分析毛白杨林地20~100 cm处土壤铵态氮含量运移规律及对生长量的影响。研究发现:4个梯度的铵态氮含量均呈现随时间减少的趋势。在40 cm土层处,铵态氮积累量达到最大,大致为200~300 mg/kg;毛白杨胸径生长量随着土壤铵态氮含量的增加而增加,当铵态氮含量为200±30 mg/kg时胸径增长量最大。研究结果可为下一步探索毛白杨林地氮肥的合理施用量提供参考依据。
This study investigates the vertical migration patterns of ammonium nitrogen content in 20~100 cm soil profiles and its growth effects on Populus tomentosa under four controlled concentration gradients:T1:50±20mg/kg,T2:100±20mg/kg,T3:200±30mg/kg,T4:300±30mg/kg.The findings revealed that the content of ammonium nitrogen in different gradients exhibited decrease with time.The maximum accumulation of ammonium nitrogen occurred in 40 cm depth(200~300 mg/kg);The diameter of breast height(DBH)growth showed increase with the ammonium nitrogen content.increasing,the largest.happened in 200±30mg/kg.This study may provide empirical basis for the reasonable application amount of nitrogen on Populus tomentosa.
作者
赵娟
Zhao Juan(Shanxi Academy of Forestry and Grassland Sciences,Taiyuan,Shanxi 030012,China)
出处
《山西水土保持科技》
2025年第2期16-19,共4页
Soil and Water Conservation Science and Technology in Shanxi
基金
“十三五”国家重点研发项目子课题“山西黄土高原区白杨工业资源材高效培育技术研究”(2016YFD060040304)。
关键词
毛白杨
铵态氮
运移规律
生长量
Populus tomentosa
Ammonium nitrogen
Movement
Growth
作者简介
赵娟(1982-):女,高级工程师,主要从事森林培育、植被恢复方面的研究,E-mail:sxndzj@163.com。
