2次结实板栗花原基形成和分化进程及其叶片营养周期研究

Dynamics of Formation and Differentiation of Floral Primordium of Double Bearing Castanea mollissima and Nutrient Cycle of Its Blade

观察了２次结实板栗２次花原基形成与分化的进程，同时对其叶片中的Ｎ、Ｐ、糖营养周期变化动态规律作了研究。结果表明，其第１次花原基形成基本与一般中国栗品种类似，而第２次混合花原基形成及分化虽同样要经历４个过程，但时间相对较短，且其混合花原基形成的极限时间为５月底至６月初，试验研究结果同时表明，２次结实板栗树体营养周期可分为休眠期、营养消耗１期、营养积累１期、营养消耗２期、营养平衡期、营养积累２期共６个时期，其中板栗雄花序数量是其树体营养消耗量的主要因素。

Observation was made on floral primodium formation and differentiation of double Bearing Castanea mollissima, and the dynamics of nitrogen,phosphorus and sugar were studied.Its first floral primordium formation was basically similar to the general chinese varieties.Although its second mixed floral primordium formation and differentiation also under gone 4 stages, the period was rather short,being from the end of may to the first of June. The results also showed that,nutrient cycle of double bearing Castanea mollissima could be divided into 6 stages : of dormant period,nutrient depletion period I, nutrient accumulation period I, nutrient depletion period II,nutrient balance,and nutrient accumulation II. The number of male inflorescence is the main factor consuming nutrient.