实验结果表明：中国蜂胶的主要植物源是杨树。

This result indicates that the plant origin of Chinese propolis is poplar.

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实验结果表明：乔松素、白杨素和高良姜素是中国蜂胶的主要黄酮类化合物；

The experimental results showed that pinocembrin, chrysin and galangin were the main flavonoids in Chinese propolis.

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中国蜂胶的胶原植物杨树芽提取物，对草莓果实病害的离体和活体控制效果进行了研究。

Here, the effects of poplar buds extracts, a main plant source for Chinese propolis, on disease control were investigated in vitro and in vivo.

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中国蜂胶的胶原植物杨树芽提取物，对草莓果实病害的离体和活体控制效果进行了研究。

Here, the effects of poplar buds extracts, a main plant source for Chinese propolis, on disease control were investigated in vitro and in vivo.

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