The effects of plant growth regulators such as B9. 6-BA togethor with8HQ.sucrose and CA on the vase-life of bud cut calendula officinalis.L.werestudied. The results showed that each pretreatment effected the sugar quantity, thevase life and the water of the cut flower.The best treatment was 8HQ +CA+Sucrose+6-BA,which prolonged the longevity for more...