[Effects of top pruning on fruiting characters of Platycodon grandiflorum].
OBJECTIVE
To investigate the effects of top pruning on fruiting characters of Platycodon grandiflorum, and find the suitable stage, in which seed growth and development furtherly.


METHODS
One-year old seedlings were chosen and planted in field. Plant height, branching number, fruit number per plant, 1000 grains weight were measured during growth and development period, respectively.


RESULTS
The treatment of top pruning postponed in turn the flowering date, lowered the plant heights and the fruit number per plant, increased the branching number and influenced significantly on 1000 grains weights.


CONCLUSIONS
The suitable stage of top pruning for producing seeds was from June 20th to July 5th.
Wang
Zhi-fen
ZF
Research Center for Nuclear Technique and Space Breeding of Chinese Herb, Shandong Academy of Agricultural Science, Jinan 250100, China. wzfchm@163.com
Shan
Cheng-gang
CG
Su
Xue-he
XH
Yan
Shu-lin
SL
Zhu
Lian-xian
LX
Sui
Chun-qing
CQ
D018556:Crops, Agricultural / Q000254:growth & development; D005638:Fruit / Q000254:growth & development*; D031238:Platycodon / Q000254:growth & development*