摘要
【目的】探究木醋液对土壤团聚体和侧柏生长的影响,为木醋液在黄帝陵古柏群保护区的推广应用提供理论依据。【方法】以木醋液为研究材料,采用土壤培养和盆栽试验相结合的方法,对灌施不同稀释倍数(0∶1,1∶0,1∶1,1∶5,1∶10,1∶25,1∶50,1∶100,1∶500,即木醋液与水的体积比)木醋液后土壤有机质含量、土壤团聚体分布、团聚体分散度、不稳定团聚体指数和侧柏生长指标(苗高、生物量)进行测定。【结果】灌施一定量的木醋液,能降低土壤pH值,提高土壤有机质含量;稀释倍数小于10倍时,灌施木醋液有利于增加>0.25mm土壤团聚体质量分数,降低土壤团聚体分散度和不稳定指数;稀释倍数大于10倍时,对>0.25mm土壤团聚体质量分数、土壤团聚体分散度和不稳定指数的影响不显著。在盆栽试验中,施用稀释25倍以下木醋液对侧柏产生毒害作用,稀释倍数在25~500倍时可促进侧柏生长,其中稀释倍数为50倍时侧柏苗高和生物量达到最大。【结论】灌施木醋液对土壤团聚体和侧柏生长均有影响。
Objective The influence of wood vinegar on soil aggregates and Platycladus orientalis growth was investigated to provide theoretical basis for application of wood vinegar in the Yellow Emperor Mausoleum. ~Methodl Using soil incubation and pot experiment methods,content of soil organic matter, distribution, dispersion,and instability index of soil aggregates, and growth indexes of Platycladus orien- talis were measured after irrigation of wood vinegar with different dilution times （0 ： 1,1 ： 0,1 ：1,1 ： 5, 1 ： 10,1 ： 25,1 ： 50,1 ： 100,and 1 ： 500, volume ratio of wood vinegar and water）. [Resultl Application of wood vinegar reduced soil pH and increased soil organic matter. When the dilution ratio was less than 10, wood vinegar increased the content of 〉0.25 mm soil aggregates, while reduced dispersion and instabil- ity index of soil aggregates. When dilution ratio was larger than 10, the effect on content of 〉0.25 mm soil aggregates, dispersion and instability index was not significant. In biological experiments, wood vinegar di- luted by less than 25 times had toxic effects,while those diluted by 25--500 times promoted the growth of P. orientalis with the maximum seedling height and biomass at 50 times. [Conclusion] Wood vinegar had influence on soil aggregates and growth of P. orientalis.
出处
《西北农林科技大学学报（自然科学版）》
CSCD
北大核心
2017年第6期75-82,共8页
Journal of Northwest A&F University(Natural Science Edition)
基金
国家林业公益性行业科研专项(201404302)
西北农林科技大学校重点科研专项(Z109021310)
关键词
木醋液
有机质
土壤团聚体
侧柏
wood vinegar
organic matter
soil aggregates
Platycladus orientalis
