チューリップの根の傷害が発育収量に及ぼす影響

he effect of injury of roots to the growth of tulip was investigated. The results are as follows :
1. Before sprouting stage, the effect of injury of roots to the growth was not so much.
But after development stage, it became conspicuous. And the more roots were injured, the more remarkable was the effect to the growth.
2. After development stage, the blind was recognized evidently. And the attack rate of blind was about 50%-90% when 40%-70% of roots were evacuated.
3. The more roots were injured, the higher was the dry matter percentage of bulbs. And it signify that as roots development is abnormal the transference rate of the compornents in bulbs decrease.
4. The effect of injury of roots to bulblet was noticed after development stage. The greater was the injured degree, the less was the moisture content in bulblet, stem and leaves at the development stage.