4种经济树种叶片浸提液对作物种子萌发化感作用的研究

用广西产的马尾松、巨尾桉、香樟、油茶4种主要经济树种的鲜叶及凋落叶浸提液作浸泡萝卜、油青菜心及上海青种子处理,进行了其对作物种子萌发影响的化感作用研究。结果表明,在4个树种凋落叶的浸提液处理中,化感作用最强的为香樟,其次为油茶、巨尾桉,最弱的为马尾松;而在4个树种鲜叶的浸提液处理中,化感作用最强的为巨尾桉,其次为香樟、油茶,最弱的为马尾松。其中萝卜种子的萌发对香樟叶片的浸提液更为敏感,而上海青种子的萌发则对油茶叶片的浸提液更为敏感。

Bioassay of Allelopathy of Aqueous Extracts of Four Main Economic Tree Species on Crop Seeds

Taking four main tree species of Guangxi namely Pinus massoniana,Eucalyptus grandis×E.urophylla,Cinnamomum camphora and Camellia oleifera as the study targets,the allelopathy of the aqueous extracts of leaves on seed germination of Raphanus sativus,Brassica parachinensis and Brassica chinensis were tested and studied.The results indicated that among the aqueous extracts of litter,the allelopathy of Cinnamomum camphora was the strongest,next came Camellia oleifera and Eucalyptus grandis×E.urophylla,that of Pinus massoniana was the lowest.As far as the aqueous extracts of fresh leaves were concerned,the allelopathy of Eucalyptus grandis×E. urophylla was the strongest,next came Cinnamomum camphora and Camellia oleifera,that of Pinus massoniana was the lowest.The seed germination of Raphanus sativus was particularly sensitive to the aqueous extract of Cinnamomum camphora,whereas the seed germination of Brassica chinensis was particularly sensitive to the aqueous extract of Camellia oleifera.