INFLUENCES OF ENVIRONMENTAL FACTORS ON THE SEED GERMINATION OF EUPATORIUM ADENOPHORUM SPR.
环境因子对杂草紫茎泽兰种子发芽的影响

The experiment was undertaken to evaluate the influences of environmental factors on the seed germination of Eupatorium adenophorum Spr. and especially on the germinating period. The results may be summarized as follows:1. The ripe seeds of Eupatorium adenophorum Spr. have higher percentage of germination under the favorable conditions, but they do not germinate in the darkness and in the abnormal pH value.2. The seeds can germinate only in a range of pH 4-7, but not over pH 8 or below pH 3. The optimum pH ...