巨尾桉枝叶水浸提液对3种作物种子萌发的影响

为了解巨尾桉（Ｅｕｃａｌｙｐｔｕｓｇｒａｎｄｉｓ＊Ｅ．ｕｒｏｐｈｙｌｌａ）内含物对其他植物的他感作用，分别用巨尾桉的新鲜枝叶和枯花叶的水浸认进行水稻、蕹菜（Ｉｐｏｍｏｅａａｑｕａｔｉｃａ）和菜苔（ＢｒａｓｓｉｃａｐａｒａｃｈｉｎｅｎｓｉｓＢａｉｌｅｙ）花种子发芽试验，经鲜液供水的水稻种子平均发芽率、发芽势分别为９５％、６０％略低于对照的９７％和６２％；蕹菜种子平均发芽率、发芽势为９３％、６２％，略

Effect of Water Extract of Branches and Leaves of Eucalyptus grandis×E.urophylla on Seed Germination of Three Kinds of Crops

To make sure the effect of the inclusion of eucalyptus on the growth of other species, the seeds of rice, Ipomoea aquatica and Wancihua were used in the germinating trial. The seeds were respectively watered during the trial with the fresh water extract (from the fresh branches and leaves of Eucalyptus grandis×E. urophylla and the withered water extract (from the withered branches and leaves of E. grandis×E. urophylla), and the distilled water was used as control. Under the fresh water extract, the average germination rate (AGR) of paddy was 95%, slightly lower than the control (97%) and its average germinating energy(AGE) was 60%, similar to the control (62%);the AGR of Ipomoea aquatica (93%) was similar to the control(94%) and its AGE was 62%, lower than the control (72%);the AGR of Wancaihua was 31%,much lower than the control (99%) and its AGE was 22%, much lower than the control (75%).Under the withered water extract, the AGR of paddy was 89%, lower than the control (98%); its AGE was 52%, lower than the control (65%);the AGR of Ipomoea aquatica was 87%,lower than the control (95%); its AGE was 47%, lower than the control (59%);the AGR of Wancaihua was 2%, much lower than the control (98%) and its AGE was 2%, more lower than the control (78%).It revealed that water extract of branches and leaves of Eucalyptus grandis×E. urophylla could reduce the seed germination of the tested crops. In the lower slope of stand of E. grandis×E. urophylla, it should be avoid growing Wancaihua, and avoid irrigating with surface water on the slope when planting paddy and Ipomoea aquotica.