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据各地调查,板栗空棚率一般在30％左右,有的地方更高。板栗母枝上雄花可多达500—700朵,而两性花只有1～3朵。因此,要板栗增产,必需增加能结实的花量,提高结实花对雄花的比例。通过多年对板栗花器不同生理发育阶段的解剖观察,找出了原因:产生空棚是由于在双受精作用完成,初生胚乳细胞分裂一圈游离核以后,不再继续分裂,受精卵发育所需有机物质未能从胚乳细胞中得到,因此合子不能发育成胚,造成空棚现象。试验研究证明,选择胚囊发育时期供给外源营养元素,能比对照增加雌花50％左右,又能有效地控制空棚的发生,大面积提高板栗单株产量。该项技术已于1984年经中国林科院和江苏、浙江、安徽等省专家审查鉴定并获成果奖。在再试验与推广中,进一步完善了配方,研制完成了
According to surveys around the chestnut shed shed rate is generally around 30%, some places higher. The chestnut mother branch male flowers up to 500-700, while the bisexual flowers only 1 to 3. Therefore, to increase chestnut yield, must increase the amount of sturdy flowers and improve the ratio of sturdy flowers to male flowers. Through years of anatomical observation on different stages of physiological development of chestnut flower, we can find out the reason: the empty shed is due to the fact that after the double fertilization is completed, the primary endosperm cells will not split further after one round of free nucleus, Matter can not get from the endosperm cells, so zygotes can not develop into embryos, resulting in empty shed phenomenon. Experimental studies have shown that the choice of embryonic sac development period of supply of exogenous nutrients, than the control to increase about 50% of female flowers, but also effectively control the occurrence of empty shed, a large area to increase chestnut yield per plant. The technology has been in 1984 by China Academy of Forestry and Jiangsu, Zhejiang, Anhui and other provinces examined and identified experts and won the award. In re-testing and promotion, to further improve the formula, research and development completed