[Effects of various planting densities on dynamic growth rhythm and root yield of Isatis indigotica].
OBJECTIVE
To study the effects of various planting densities on dynamic growth and root yield of Isatis indigotica.


METHODS
The planting samples were collected to measure the growth period of each organ.


CONCLUSIONS
Under different planting densities, both main root length and breadth exhibited a trend of "fast-slow" by stages. However, the number of individual plant leaves were showed a trend of "slow-fast" on growth period. Meanwhile, the leaf length and breadth were exhibited a trend of "increase-decrease". The increase of dry leaf, dry root and whole plant dry matter was faster during the period of 65-76 days after seeding. The differences of root and leaf yields under various densities were significant. Planting densities has a great effect on yield of root. It must be shown that there was a positive development between the individual plant and colony. According to the dry matter of root and leaf, treatment B (i.e., 7 cm x 25 cm) was good choice.
Chen
Yu-hang
YH
Institute of Chinese Medicinal Materials, Nanjing Agricultural University, Nanjing 210095, China.
Tian
Han-qing
HQ
Guo
Qiao-sheng
QS
Deng
Qiao-hua
QH
Guo
Jian-ying
JY
Guan
Cheng-zhong
CZ
D018533:Biomass; D031219:Isatis / Q000254:growth & development*; D018517:Plant Roots / Q000254:growth & development*