滨海盐碱地不同造林树种林地土壤盐碱化特征  

SALINIZATION CHARACTERISTICS OF AFFORESTED COASTAL SALINE SOIL AS AFFECTED BY SPECIES OF TREES USED IN AFFORESTATION

作　　者：王合云 李红丽[1] 董智[1] 陈新闯 邵水仙 

机构地区：[1]山东省土壤侵蚀与生态修复重点实验室(山东农业大学林学院)泰山森林生态定位站,山东泰安271018

出　　处：《土壤学报》2015年第3期706-712,共7页Acta Pedologica Sinica

基　　金：世界银行贷款山东生态造林项目"山东生态造林项目生态效益监测与评估"(SEAP-JC-2)资助

摘　　要：采用野外取样与室内分析测试相结合的方法,对不同林地土壤的全盐量、阴阳离子组成、总碱度、p H、电导率、碱化度等指标进行了系统研究。结果表明:对照空地与各林地土壤中均无CO32-存在,造林可明显改变土壤中Na+、Cl-、SO42-、HCO3-等可溶性盐离子的含量,降低土壤全盐含量,造林地土壤阴离子由SO42-+Cl-为主演变为SO42-+HCO3-为主。土壤p H、碱化度和总碱度的变化趋势一致,不同造林地土壤碱化程度以紫穗槐林地最大,柽柳林地次之。土壤全盐含量(y)和电导率(x)间呈极显著线性正相关,故可用电导率计算含盐量进行研究区域的盐渍化程度分级。研究结果可为阐明滨海盐碱地的盐碱化过程、指导土壤改良提供参考。Soil samples were collected from afforested woodlots different in tree species for in-lab analysis of total salt content, anion and cation compositions, total alkalinity, pH, electrical conductivity, and alkalization degree, of which a systematic study was done. Results show： no CO2-3 was detected in a tract of clearing as control and all the woodlots; afforestation significantly changed the content of soluble salts, like Na＋, CI-, SO2-4 and HCO3 and reduced the content of total salt in the soils; in afforested soils, anions SO2-4-＋HCO-3 replaced SO2-4＋C1- in dominancy; soil pH and alkalization degree and total alkalinity varied in a similar trend; and among the woodlots, the one of Amorpha fruticosa was the highest in alkalization degree, and followed by Woodlot Tamarix chinensis; Correlation analysis indicates that soil total salt content （y） is in extremely significant positive linear relationship with electrical conductivity （ x ） , so it is feasible to calculate total salt content with soil electrical conductivity in grading the area by salinization degree. The findings of the study may serve as reference in elucidating salinization-alkalization processes of the coastal saline soil and in ameliorating the soil in the Yellow River Delta.

关 键 词：造林树种 可溶性盐离子 盐碱化 滨海盐碱地 

分 类 号：S728.5[农业科学—林木遗传育种]