Pre- and post-flowering photooeriod responses in early soybean varieties

摘要

When early soybean varieties were treated with short days (SD), the days to flowering from emergence were not significantly delayed. Therefore, these varieties were considered to be insensitive to the photoperiod (Garner and Allard, 1920; Wang et al.,1956). Liu et al., (1983) and Xu et al., (1990) reported that the pre-flowering SD treatment hastened the post-flowering development, although SD did not significantly change the length to flowering from emergence. In order to study the effects of pre-and post-flowering photoperiods on the whole growth period of early soybeans and to compare the photoperiodic sensitivity before and after flowering in these varieties, 2 pot experiments were carried out in this study.