火炬树根和凋落叶水浸提液对小麦种子萌发的化感作用  

Allelopathic Effects of Water Extraction from Root and Leaf Litter of Rhus typhina on the Germination of Wheat Seeds

作　　者：闫兴富[1,2] 周云峰 杜茜[1,2] 

机构地区：[1]北方民族大学生物科学与工程学院,宁夏银川750021 [2]国家民委生态系统模型及应用重点实验室,宁夏银川750021

出　　处：《种子》2011年第5期17-20,共4页Seed

基　　金：国家民委生态系统模型及应用重点开放实验室资助项目(No.2007SY001)

摘　　要：研究了不同浓度(10%、5%、2.5%和1.7%)的火炬树(Rhus typhina)根和凋落叶水浸提液对小麦种子萌发的化感作用。结果表明:2种器官水浸提液对小麦种子萌发均具有强烈的化感抑制作用,表现为萌发率、萌发指数、幼苗活力指数的降低和萌发进程的延迟(萌发速率系数增大),而且具有明显的浓度作用;火炬树凋落叶水浸提液对小麦种子萌发的化感作用强于根的化感作用;火炬树根和凋落叶水浸提液对小麦种子萌发指数的化感作用最强,对幼苗活力指数的化感作用次之,对萌发速率系数的化感作用最弱。The allelopathic effects of different concentration （ 10% ,5 % ,2.5 % and 1.7 % respectively） of water extraction from root and leaf litter of Rhus typhina on the germination of wheat seeds were investigated. The results indicated that the germination of wheat seeds was significantly inhibited by the water extractions from both root and leaf litter of R. typhina. The decrease of germination percentage, germination index and vigor index, the delay of germination course （increase of coefficient of germination rate） and evident concentration effects were observed. The allelopathic effect of leaf litter on the germination of wheat seeds was higher than that of root. The highest allelopathy of water extraction from root and leaf litter of R. typhina on the germination index was observed and followed with that on vigor index. The allelopathic effect on the coefficient of germination rate was the lowest.

关 键 词：火炬树 水浸提液 小麦 种子萌发 化感作用 

分 类 号：S512.1[农业科学—作物学]