青藏高原干旱地区8种主栽小麦品种对旱雀麦的化感作用评价
Evaluations on allelopathy of eight main cultivated wheat varieties to Bromus tectorum Linn in Qinghai-Tibet plateau arid zone

以青藏高原地区青海省东部干旱区域常见杂草旱雀麦（Bromus tectorum Linn）作为受体，用琼脂共培法对青藏高原青海省东部干旱区域8种主要栽培小麦品种进行化感作用的评价。结果表明：8种小麦品种对旱雀麦的发芽率、发芽势抑制强度为2.78%～69.44%,其中高原448抑制作用最强，乐麦5号抑制作用最弱，青春38、高原437、通麦1号对旱雀麦种子萌发的抑制率都达到10%以上，而互助红、互麦14则对旱雀麦种子萌发表现为负的抑制率。相关性分析得出：处理间化感作用的差异在根长、芽长、干重方面的P值分别为0.0166、0.0194和0.0001，达到显著水平，鲜重P值大于0.5，相关性。利用化感作用效应指数（RI值）作为化感指标，结合聚类分析得出高原448化感作用最强，青春38、高原437、通麦1号、阿勃化感作用中等，互助红、互麦14号、乐麦5号没有化感作用。
To evaluate allelopathy effects, equal compartment agar method (ECAM) was used to inoculate eight main wheat varieties from Qinghai province of the Qinghai-Tibet plateau with dry oats (Bromus tectorum Linn) that functioned as the receptor. The experimental results showed: eight varieties of wheat to Bromus tectorum Linn of Germination rate and potential inhibition range 2.78%～69.44%. Gaoyuan 448 inhibition the strongest and Lemai 5 is the weakest, Qingchun 38、Gaoyuan 437、Tongmai1to Bromus tectorum Linn germination inhibition rate reached more than 10%, Huzhuhong、Humai 14 showed negative inhibition. Correlation analysis results: P value of root length is 0.0166 shoot is 0.0194 and dry weight is 0.0001 reached a significant level, the fresh weight of P values greater than 0.5, no correlation. Using RI value as an allelopathic index, as well as a cluster analysis, one variety (Gaoyuan 448) was concluded to possess strong allelopathic effect, four varieties(Qingchun 38, Gaoyuan 437, Tongmai 1, Abo) were found to be moderately allelopathic, and three other varieties (Huzhuhong, Humai 14, Leimai 5) were demonstrated to have no allelopathy.