新红星与其他元帅系苹果一样,普遍存在坐果率低的现象,严重妨碍产量的提高。 一、坐果率低的原因 (一)品种的遗传性 新红星苹果一方面柱头低于雄蕊,而雄蕊掩盖了雌蕊,且本身又是高度异花授粉品种,自然影响其正常的授粉与受精。另一方面新红星胚珠寿命短,又必然缩短有效授粉期。所谓有效 Like other marshals and apples, the new Red Star is prevalent in the phenomenon of low fruit set rate, which seriously hinders the increase of output. First, the reasons for low fruit setting (a) the genetic new Red Apple varieties on the one hand lower than the stigma stamens, and stamens cover the pistil, and is itself highly cross-species pollination, the natural impact of its normal pollination and fertilization. On the other hand, the new red star ovule short life expectancy, but also shorten the effective pollination period. The so-called effective