The physiological and biochemical mechanisms and effects of competition between Bristlegrass and Crofton weedA multiple de Wit replacement series was used between Crofton weed and Bristlegrass.

• 表明紫茎泽兰经受的种间竞争大于种内竞争，而狗尾草经历的种内竞争大于种间竞争。 狗尾草和紫茎泽兰混种时的相对产量总和(RYT)在所有密度、比例组合时都与1.；0差异不显著，这表明狗尾草和紫茎泽兰的生长需求相同的资源；