冷箭竹生殖特性研究

１９８１－１９９０年对冷箭竹（Ｂａｓｈａｎｉａｆａｎｇｅｎｉａ）开花、结实、种子萌发、幼苗更新复壮等生殖特性进行了观察。冷箭竹开花周期为４５－５５年，开花持续期约１０年，１９８３年盛花期测定茎秆上着生花序的长度平均为１７０．８ｃｍ，每１茎秆上的小花数为１２８０．３枚，每朵小花从开放至萎蔫的持续期约６天，花药持续开裂时间为０．７７天，花粉生活力达９６．７％，柱头承受花粉时间为２．３天，雌蕊子房发育为果实平均为３５８６粒／ｍ￣２，未受粉的瘪粒为１３９９４粒／ｍ￣２。种子生活力为２７．６％，种子发芽率为１５％－２０％，当年生幼苗成活率为７６％－９３％。

STUDY ON REPEODUCTIVE CHARACTERISTIC OF BASHANIA FANGENIA

From 1981 to 1990,author observed the reproductive characteristics of Bashania fangenia include blossoming, bearing fruit,sprouting of seed, seedling renovating etc.The blooming cycle of Bashania fangenia is 45 to 55 years.And its blooming phase is about 10 years,In 1983,in the heyday of blooming phase,we surveyed its average length of bamboo pole inflorescence is 170.8cm,the floret numbers of every bamboo pole is 1280.3.From blossom to blossom fall,it contin-ued period of every floret is 6 days;the continued time of anthers split open is 0.77 day;vigour of pollen attain 96. 7 per cent;the period of stigma pollination is 2.3 days;the average rate that the ovary of pistil developmented fruit is 3586 grains per square rneter ; the rate of sterile ovary is 13994 grains per square meter, Its vigour of seed is 27. 6 per cent,rate of seed sprouting is 15 to 20 per cent,survival rate of seedling in its prime year is 76 to 93 per cent.