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具喙田菁的花期随着日照时数的减少而提前;诱导开花的短日照处理天数随着日照长度的缩短而减少;相同日照时数条件下,花期因温度升高而提前。本文据此提出中纬度地区最适短日照时数为每天11小时,处理58天。7月上旬开花,9月初种籽成熟。
The flowering period of bearded Sesbania increased with the decrease of sunshine hours; the days of short-day treatment induced flowering decreased with the shortening of sunshine duration; the flowering increased earlier under the same sunshine hours. This paper proposes that the optimum short-day sunshine hours in mid-latitudes is 11 hours per day for 58 days. Early July flowering, mature seeds early September.