Physiological studies on the tabacco seedlings : I. The flowering reaction of the seedling grown by different environmental conditions in related to the exposure of low temperature.

[摘要] The auther has been made an experiment to see the influence of natural low temperature of planting time upon the developmental process of tabacco seedlings, which were grown under different conditions. The seedlings to be test were divided into six kinds by the difference of the next growing method, and each of them were separately cultured in green house (high temperature plot) and open field (natural low temperature plot.) respectively. The kind and the growing method of seedling. [table] The result of this experiment can be summarized as follows ; The growth and flowering of all plants exposed to natural low temperature were delayed compaired with that to high temperature, and their total leaf number has decreased. But an exception, in this case, was recognized ; the seedlings grown roughly in seed bed of open field were flowered very rapidly, and their total leaf has remarkably decreased. According to the above results, it is low temperature affects the development of tobacco plant as well general winter crops and accelerates at least, the flower initiation. Moreover, it is suggested that the reaction degree of seedlings itself to this temperature will be varied clearly by their different developmend and nature.

[学科分类] 农业科学（综合）