我国不同林龄桉树对土壤理化性质影响研究进展

Review of Variation of Soil Physical and Chemical Properties Among Eucalyptus Plantations of Different Ages in China

通过精确匹配检索CNKI数据库,搜索近10年来我国不同林龄桉树土壤理化性质研究的相关文献,依据其研究结果,综述表明:中龄林对土壤容重、含水量和土壤孔隙度影响较大;近成熟林对土壤容重无显著影响,但土壤含水量升高,土壤孔隙度增加;成熟林对土壤物理性质无明显影响;过熟林土壤容重无显著变化,而土壤孔隙度和含水量分别呈现出增大和减小趋势;土壤有机碳除成熟期呈现小幅度降低趋势外,整个桉树生长期呈现稳定增加趋势;土壤pH值不断升高,但总体仍呈弱酸性;土壤氮、磷、钾等含量变化在各个生长期区域差异性较强。推进过熟林土壤理化性质监测研究和不同立地类型下桉树土壤理化性质空间差异研究是今后研究的重点方向。

A review was conducted on the physical and chemical soil properties of Eucalyptus plantations of different ages in China based on both papers retrieved from searches of the CNKI database by matching keywords,and publications found by searches of relevant literature covering the past 10 years.This review of publications indicated that:middle-aged plantations have a greater impact on soil bulk density,soil water content and soil porosity;near-mature plantations have no significant impact on soil bulk density,but soil water content increases and soil porosity increases;mature plantations have no significant impact on soil physical properties;soil bulk density of over-mature plantations did not change significantly.However,overall the studies indicated that soil porosity tended to increase,and water content tended to decrease with increasing plantation age.Except for a small decrease in soil organic carbon during mature phases,this soil property tended to increase steadily for the entire Eucalyptus growth period.Similarly,soil pH kept increasing with plantation age,but overall soils generally remained weakly acidic.Meanwhile,changes in soil nitrogen,phosphorus,and potassium contents varied during each growth period.Monitoring and research of soil physical properties and research on spatial differences of Eucalyptus soil physical and chemical properties under different site types needs to be a focus area for future research.