大小年结实,即高产年与低产年依次轮流出现,是伏令夏橙通常的特性,给栽培管理、市场销售造成困难,是柑桔业的一个普遍问题。大小年的发生,起初是因留存树上的果实阻碍了花的形成,以致高产后花量太少,次年不能再度高产。或因条件不利于座果而引起低产(小年),或当繁花盛开时遇良好的外界条件,这样以后就形成大小年结实的局面。 The size of the year is strong, that is, the high-yielding and low-yielding turns in turns, which is the usual characteristic of summer orange. It is a common problem for citrus industry to cause difficulties in cultivation management and marketing. The size of the year, initially due to retained the fruit on the tree hinder the formation of flowers, resulting in too little after the high yield, the following year can not be another high yield. Or because the conditions are not conducive to the fruit and low yields (small year), or when the flowers bloom in case of good external conditions, so that after the formation of the size of the year sturdy situation.