衡南县是湖南秋大豆的主要产区之一,耕作制度主要是早稻—秋大豆—油菜(或紫云英)一年三熟制。秋大豆一般是中熟的地方品种。研究秋大豆的开花时间和花荚脱落规律,对开展杂交育种、防止花荚脱落、提高单产,很有必要。为此,我们对秋大豆的每日开花时间和花荚脱落现象进行了观察研究。 Hengnan County, Hunan autumn soybean is one of the main producing areas, farming system is mainly early rice - autumn soybean - rape (or Astragalus) cooked three times a year. Autumn soybeans are generally cooked in the local varieties. It is necessary to study the flowering time of autumn soybeans and the law of shedding of flowers and pods, so it is necessary to carry out crossbreeding, prevent flower pods from falling off and increase yield. For this reason, we observed the daily flowering time of autumn soybean and flower pod shedding.