地质与资源2026，Vol.35Issue(4)：390-398,9.DOI:10.13686/j.cnki.dzyzy.2026.04.002
东北地区农田暗棕壤磷组分垂直分布特征研究
Vertical distribution of phosphorus fractions in dark brown soil of farmland in Northeast China
摘要
Abstract
Phosphorus is an essential element for the growth of plant in various physiological and biochemical processes,playing a crucial role in plant development and metabolism.However,because of its complex and diverse forms and distribution in soil,only a small portion of the total phosphorus is presented as the plant-available phosphorus(available P).To understand the vertical distribution characteristics of phosphorus fractions in farmland dark brown soil in Northeast China and to explore the correlation of various phosphorus fractions to soil available P and physical-chemical properties,this study collects soil samples from different layers of dark brown soil in Heihe region of Heilongjiang Province,determines the phosphorus fractions with Hedley method,and analyzes the vertical changes of phosphorus fractions in dark brown soil,along with their correlations with soil available P and physical-chemical properties.The results show that both available P and phosphorus fractions in dark brown soil exhibit significant surface aggregation effect,meaning their contents decreased to varying degrees with increasing soil depth.Among the phosphorus fractions,the content and proportion of active phosphorus(H2O-Pi and NaHCO3-Pi)are relatively low,while that of moderately active organic phosphorus(NaOH-Po)is the highest.The contents of NaHCO3-Pi,NaHCO3-Po,and H2O-Pi are significantly correlated with soil available P.The physical-chemical properties such as soil depth,pH,cation exchange capacity,rapidly available potassium,total carbon,total nitrogen,and organic carbon are significantly correlated with soil phosphorus fractions.关键词
黑土地/暗棕壤/磷组分/有效磷/土壤成分分布Key words
black soil/dark brown soil/phosphorus fraction/available phosphorus/distribution of soil composition分类
天文与地球科学引用本文复制引用
李翰澎,赵文志,李贺,郭亚芬..东北地区农田暗棕壤磷组分垂直分布特征研究[J].地质与资源,2026,35(4):390-398,9.基金项目
中国地质调查局东北地质科技创新中心区创基金项目"外源有机酸对黑土土壤磷形态转化及机理研究"(QCJJ2022-7) （QCJJ2022-7）
自然资源耦合过程与效应重点实验室开放课题"玉米根系分泌有机酸对黑土磷形态转化及有效性的影响"(2022KFKTC012). （2022KFKTC012）
