Yield and quality of tobacco seed as affected by environmental factors iii. seed yield and quality of flue cured tobacco in relation to planting dates

Chang, C.S.; Hung, C.T.; Liaw, C.D.

Bulletin of Taiwan Tobacco Research Institute Taiwan Tobacco and Wine Monopoly Bureau 22: 1-12

1985


Accession: 006924567

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Abstract
The aim of this study was to investigate the effects of planting dates on seed yield and quality of new flue-cured tobacco varieties. A factorial design with four replications was used. Treatment consisted of three transplanting dates and three tobacco varieties (i.e. TT5, TT6 and TT7). The results showed that the seed yield, the total number of flowers per plant and the percentage of abnormal flowers of cultivar TT5 were the highest, and those of TT6 were the worse among the three varieties tested. The early transplanting favoured seed production and total flowers per plant, but was unfavorable to the development of abnormal flowers. It suggested that early transplanting (Sept. 19) would improve seed production. Reduction in seed yield by bagging the seed head was about 20.9% in early transplanting (Sept. 19), and 40.3% in late transplanting (Oct. 13). In comparison of the variation of climatic factors during this experiment with the occurrence of the abnormal flowers, we found that low temperature might be an important factor which stimulated the formation of abnormal flowers. Such abnormal flowers were not favorable to the self-pollination, and resulted in the poor seed yield in the late transplanting treatment in this experiment. In short, early transplanting is suitable and seed head should not be bagged in order to increase the seed yield of new tabacco varieties, TT6 and TT7.