东北地区不同小麦品种对黑麦草的化感作用

以东北地区33个不同来源的小麦品种为研究对象，采用琼脂共培法，评价了不同小麦品种对黑麦草所产生的化感作用.通过分析不同小麦品种对黑麦草根长、苗高、根干重及苗干重的影响，探讨不同小麦品种对黑麦草化感作用的差异，从而筛选出具有较强化感潜力的小麦品种.结果表明，不同小麦品种对黑麦草根长、苗高、根干重及苗干重的影响存在显著差异.利用RI值作为化感作用的指标，结合聚类分析方法，可将这33个小麦品种按化感能力的强、中、弱分成3类；其中龙幅麦9号、龙幅麦13号、锦麦2003和小冰麦33号为化感能力较强的品种.

Allelopathic potentials of different wheat varieties in Northeast China against ryegrass

By using equal compartment agar method(ECAM),and through measuring the root length,shoot height,and root-and shoot dry weights of test ryegrass,this paper evaluated the allelopathic potentials of thirty-three wheat varieties with different origins in Northeast China against ryegrass.The results showed that different wheat varieties had significantly different allelopathic effects on ryegrass growth.With RI value as allelopathic index and through cluster analysis,these varieties could be divided into three groups,among which,four varieties(Longfu 9,Longfu 13,Jin 2003,and Xiaobing 33) were demonstrated to be obviously allelopathic,and inhibited the ryegrass growth strongly.