湿生扁蕾种子处理和田间覆盖试验

2004年在甘肃省临潭县进行了湿生扁蕾种子处理和田间覆盖试验,结果表明:赤霉素能有效提高湿生扁蕾种子的发芽率,其中以浓度300 mg／L的赤霉素处理发芽率最高,高于对照37．00％;采用40℃温水浸种发芽率提高 9．00％,并可加快发芽速度;湿生扁蕾在15℃的环境条件下发芽率可达最高,播种时间以5月上旬为宜;采用85％遮光率的遮阳网覆盖,湿生扁蕾出苗率最高,达9．29％;秸秆+遮阳网覆盖和秸秆覆盖出苗率也极显著地高于对照．地膜等具有显著增温效应的覆盖材料不宜用于湿生扁蕾．

Seed treatment and field mulching experiment on Gentianopsis paludosa

The seed treatment and field mulching experiment on Gentianopsis paludosa was conducted in 2004 at Xincheng Town,Lintan County,Gansu Province. The results indicated that:the germination rate could be increased significantly when the seeds were treated with GA3. The germination rate was the highest under 300 mg/L of GA3 treatment,which was 37. 00 % higher than that under 0 mg/L GAS (CK)treatment. The germination rate could be increased by 9. 00% with seed soaking in 40 ℃ water,and the process of germination was also accelerated. The optimum temperature for germination was 15 ℃ ,and the suitable sowing period was in first 10 days of May. The highest emergence rate was 9.27 % when mulching with 85 % shade rate sunshade net. The higher emergence rate could be achieved by mulching with sunshade net + straw or straw only. It is not suitable for using mulching materials which could increase soil temperature, such as plastic film,for Gentianopsis paludosa.