摘要
研究了白首乌光合特性及其与产量的关系。结果表明,白首乌功能叶高光合持续期在叶片全展后10~35d,此时植株的生长中心在地上部,同化物主要供应叶片、花和果实的生长,运往根部比例较少。此时期处于夏季高温天气条件下,在中午有光合抑制现象发生,影响了同化物的积累。在块根膨大时期功能叶相继进入衰老阶段,同化能力下降,干物质积累量减少,影响了产量的提高。
The photosynthetic characteristics and its relationship to the yield of Cynanchum bungei Decne were studied.The results indicated that the duration of functional leaves with high photosynthesis was at 10~30d after the leaves spread thoroughly and the growing center of the plant was the overground parts,while photosynthates were mainly supplied to the leaves,flowers,fruits;and very few of it were distributed to the roots.The inhibition of photosynthesis often occured at summer noon,because the high temperature affected the accumulation of the photosynthates.At the stage of the radix＇s expansion,the leaves senesced,the assimilate content declined,accumulation of the dry-matter diminished,which affected the increase of yield.
出处
《核农学报》
CAS
CSCD
北大核心
2010年第1期176-180,共5页
Journal of Nuclear Agricultural Sciences
基金
山东省优秀中青年科学家奖励基金(03BS049)
关键词
白首乌
光合特性
叶绿素荧光
Cynanchum bungei Decne
photosynthetic characteristics
chlorophyll fluorescence
