Abstract:

Seeds formulation character and productivity of two Lespedeza species were studied, and the results showed that the bearing periods of two Lespedeza species were different： 111 - 121d for L. hedysaroides and 103～108 d for L. davurica. Seed setting rates of both Lespedeza were as high as 95% ; inflorrescence of L. hedysaroides was 805.6, that of L. davurica was 277.0; the maximum blooming time of thes two Lespedeza per day were also different： L. h hedysaroides at 9：00 - 10： 00, while L. davurica at 10 ： 30～ 11： 30, but the flower dosing time of thes two Lespedeza were all at 15 ： 30 ～ 16： 00. The pod rate and ripe rate of L. hedysaroides were higher than those of L. davurica. These two Lespedeza species had different characters in seed harvesting time, germination rate, hard seed rate and thousand seed weight, but they had the same harvesting time around Sept. 20th. The seed yield of L . hedysaroides was 607.33 kg/hm^2, that of L. davurica was 591.77 kg/hm^2.

Key words: L. hedysaroides , L. davurica , seed , flowering behavior

摘要：

通过研究尖叶胡枝子和达乌里胡枝子种子形成特性及生产性能，结果表明，尖叶胡枝子和达乌里胡枝子从返青期到种子形成分别需要111～121d和103～108d；二者生殖枝率较高，可达95％，尖叶胡枝子的单株花序为805．6个，达乌里胡枝子为277．0个；二者日开花高峰时间不同，尖叶胡枝子出现在9：00～10：00，达乌里胡枝子在10：30～11：330，而二者闭花高峰均出现在15：30～16：00；尖叶胡枝子的结荚率和成熟率比达乌里胡枝子高，种子收获期不同，种子的发芽率、硬实率和千粒重也不相同，两种胡枝子适宜的收获期均在9月20日左右，种子贮藏时间对其发芽率和硬实率有明显的影响；尖叶胡枝子的种子产量为607．33kg／hm^2，达乌里胡枝子为591．77kg／hm^2。

关键词: 尖叶胡枝子 达乌里胡枝子 种子 开花习性