摘要
为提高软荚红豆Ormosia semicastrata播种育苗效果,在研究软荚红豆果荚与种子形态特征的基础上,测定其种子室内和场圃发芽率,并采4 种方法培育苗木,比较其生长效果.结果表明,软荚红豆果荚平均长为11.81 mm,平均宽为 8.77 mm,平均重为 0.373 7 g;种子平均长为 8.09 mm,平均宽为5.69 mm,千粒重为 242.32 g.果荚出籽率约为 64.84%.室内最高发芽率为 70.00%,平均发芽率为53.33%,从第7 天开始发芽,21 天后结束;不同方法处理种皮,场圃发芽率差异极显著,以T6 处理发芽率最高,为84.37%;4 种处理培育苗木,以T2(黄心土基质且全光照)保存率较高,达到 94.44%.两种基质相比,黄心土保存率比轻基质保存率高5.55 个百分点,软荚红豆幼苗生长相当缓慢,11 个月平均苗高为6.61 cm,平均苗径1.75 mm.
Abstract
In order to improve the sowing and seedling raising of Ormosia semicastrata,based on the study of the morphological characteristics of the fruit pods and seeds of O.semicastrata,the germination rate of soft pod red bean was measured in the laboratory and field,and 4 kinds of treatments were selected to compare the seedling cultivation techniques.The results showed that the average length of the pods of O.semicastrata was 11.81 mm,the average width was 8.77 mm and the average weight was 0.373 7 g.The average seed length was 8.09 mm,the average width was 5.69 mm,the 1 000-grain weight was 242.32 g.The seed rate of fruit pods was about 64.84% .In the laboratory,the highest germination rate was 70% and the average germination rate was 53.33% .The germination started from the 7th day and ended after 21 days.The germination rate was significantly different in different treatments,and the highest germination rate was 84.37% in the T6 treatment.The preservation rate of the seedlings in T2(yellow soil matrix and full light)was 94.44% .Compared with the two substrates,the retention rate of yellow core soil was 5.55 percentage points higher than that of light sub-strate,and the growth of O.semicastrata seedlings was rather slow,with an average seedling height of 6.61 cm and an average seedling diameter of 1.75 mm at 11 months.
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