芝麻属无限开花作物,在温度适宜、根系健壮、营养充足的条件下,能不断现蕾开花结蒴。当芝麻成熟时,茎秆顶端有些花不能发育成蒴或只形成一些秕籽、空蒴,为无效蒴果。适时打顶可以控制或减少无效蒴果,增加蒴果籽粒数,并提高籽粒饱满度,一般可增产8％～10％。 芝麻打顶的关键是掌握适宜的打顶期。打顶过早会影响植株生长,减少结朔数,降低产量;打顶过迟,起不到调节养分、增加粒重的作用,失去了打 Sesame is an unlimited flowering crop, in the appropriate temperature, strong roots, adequate nutrition, the bud can continue to flowering knot bolt. When the sesame seeds mature, some flowers at the top of the stalk can not develop into bolls or only some seeds, empty capsules, which are ineffective capsules. Timely topping can control or reduce the invalid capsules, increase the number of capsules, and increase the plumpness of the grain, the general increase of 8% to 10%. The key to sesame topping is to master the appropriate topping period. Too early toe will affect the plant growth, reduce the number of knot, reduce the output; Too late to play, to regulate nutrients, increase the role of grain weight, lost playing