糙叶丰花草种子发芽特性研究
Studies on seeds germination of Borreria articularis
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摘要: 糙叶丰花草为海南本地常见的草本植物,适宜在热带果园作为草种生草栽培。为提高对糙叶丰花草种子的认识,为引种栽培提供技术支撑,研究了其种子的特性和发芽规律。结果表明:糙叶丰花草种子千粒重2.28 g,含水率22.93%,无硬实现象;种子存在初生休眠现象,休眠期长短不一;破除种子休眠的适宜方法是采用浓度150~300 mg/L 赤霉素浸种24 h,而采用热水浸种的效果不明显;种子发芽最适宜的温度为30~35℃,最佳土壤相对含水量为30%~50%,播种深度在6 cm 以上时出苗率较高。因此,建议在播种糙叶丰花草前,预先采用浓度150~300 mg/L 赤霉素浸种24 h 处理,播种时避开低温季节,深度以6 cm 以上为宜,同时避免浇灌过量,有利于种子萌芽出苗。Abstract: Borreria articularis( Linn.f.) F N Williams is a common herbaceous plant used widely in tropical orchard china in Hainan Province,The paper studied the characteristics of germination of B. articularis( L.f.) F. N. Williams seed. Results indicated that:the 1000-seed weight was 2.28 g,the moisture content of the seed was 22.93%,and had no hard to cook phenomenon. The seed had primary dormancy,the dormant period varied. The best method of sreak seed dormancy was that seeds treated with 150-300 mg/L GA3 for 24 hours,and the effect of soaking seeds with hot water was not significant. The optimum temperiture for the seed sprouting was 30-35℃,the optimum soil water content was 30%-50%,and the seedling rate increased with increase sowing depth up to 6 centimeters. Therefor,it is recommended that soaded seeds priviously with 150-300 mg/L GA3 for 24 hours before sowing, avioded low temperiture and excessive watering during sowing,it is also advisable to sowed seeds at the depth 6 centimeters and more,which was beneficial to seedling.