棚（室）种番茄用２，４－D蘸花，既有利于座果，也能刺激果实膨大、增加产量、促进早熟。那么花瓣开展到什么程度进行蘸花效果最好呢？对此，沧州农校于２０００年对棚（室）番茄蘸花的时机进行了选择试验：试验地点为沧州农校温（室），供试品种为中杂９号。种植样式为大小行 Shed (room) kind of tomato dip with 2,4-D flowers, both for fruit, but also to stimulate the fruit enlargement, increase production and promote premature. So to what extent the petals to carry out the best effect of dipping it? In this regard, Cangzhou Agricultural School in 2000 on the shed (room) tomato dipping timing of the opportunity to choose a test: test site Cangzhou Agricultural School temperature (room), the test varieties Zhongza 9. Planting styles for size rows