板栗生殖器官的分化与建成

1988～1989年两年的观察、研究表明,在北京怀柔地区,板栗(Castanea mollissima Bl.)混合花序的分化主要在6月中旬至8月中旬。两性花序的分化和器官建成在4月初至6月初。7月中、下旬为胚的形成期。8月上、中旬为胚乳吸收期。8月份果实迅速膨大。板栗在年周期中对水分的需要有3个重要阶段,对缺乏氮素反应敏感。

The Differentiation and Formation of Reproductive Organs about Chestnut

A two-year observation (1988-1989) indicates that the differentiation mixture inflorescence about chestnut in Beijing Huairou area is from the middle ten-days of June to the middle ten-days of August. The differentia-tion of both sexes inflorescence and organs formation are from the beginning of April to the beginning of June. The stage of formation and differentiation of embryo are from the middle to the last ten-days of July. Endosperm is assimilated from the first to the middle ten-days of August. The fruits exp-and in August rapidly. Castanea mollissima needs moisture and there are three important stages in a year cycle. Chestnut is sensitive when it is short of nitrogen.