摘要
采用盆栽方法,研究了不同程度铅胁迫条件下施用有机肥对小麦生长的影响.结果表明:无论施肥与否,随着铅胁迫程度的加剧,小麦均表现出株高下降、次生根数减少、总根质量下降、总根长缩短、根系活力和吸收面积降低、根系SOD和POD活性下降、MDA含量增高的趋势,但在不同施肥处理下的下降幅度不同.施用有机肥可以不同程度地缓解铅胁迫对小麦生长的影响,延缓小麦根系衰老,促进根系发育与生长,最终使小麦产量增加,籽粒中的铅含量降低.
A pot experiment was conducted to study the effects of organic manure on the wheat growth under different levels of lead stress.With increasing lead stress level,whether fertilization or not,the plant height,shoot dry mass,adventitious root number,root total length,root dry mass,root activity,root total and active absorbing area,and root SOD and POD activities decreased,and root MDA content presented an increasing trend.The decrement of the above-mentioned parameters differed with fertilization treatments.Applying organic manure mitigated the impact of lead stress on wheat growth to some extent,delayed the senescence of wheat roots,and promoted root development and growth,ultimately leading to the increase of wheat yield and the decrease of lead content in grain.
出处
《应用生态学报》
CAS
CSCD
北大核心
2011年第4期1094-1100,共7页
Chinese Journal of Applied Ecology
基金
国家自然科学基金面上项目(30871483)
山西省自然科学基金项目(2006011086)资助
关键词
小麦
有机肥
铅胁迫
根系
wheat
organic manure
lead stress
root
