淡烟熏棚当黄瓜幼苗长到1～4片真叶时,向温室中放满淡烟,密封2～3昼夜,可使黄瓜雌花增加,提高产量。这是因为烟中含有一氧化碳,它能抑制秧苗体内的氧化过程,使瓜秧形成众多的雌花。同时,烟熏还可杀死红蜘蛛。人工授粉黄瓜是单性花,有雌雄之分,在大 Light smoked shed when the cucumber seedlings grow to 1 to 4 true leaves, to the greenhouse full of light tobacco, sealed 2 to 3 days and nights, the cucumber female flowers can increase and increase production. This is because the smoke contains carbon monoxide, which can inhibit the oxidation process of seedlings, so that the formation of a large number of melon seedlings of female flowers. At the same time, smoked can kill spider mites. Artificial pollination cucumber is unisexual, male and female points, in the big