薇甘菊种子萌发特性的初步研究  

A Preliminary Study on the Seed Germination in Mikania micrantha

作　　者：李鸣光[1] 张炜银[1] 王伯荪[1] 张军丽[1] 昝启杰[1] 王勇军 

机构地区：[1]中山大学生命科学学院,广东广州510275 [2]广东内伶仃福田国家级自然保护区,广东深圳518040

出　　处：《中山大学学报（自然科学版）》2002年第6期57-59,共3页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金重大资助项目 (39899370 ) ;国家自然科学基金重点资助项目 (39830 310 ) ;广东省林业科技重点攻关资助项目 (2 0 0 0 - 0 1) ;深圳市科技局资助项目 (2 0 0 0 0 10 5 80 )

摘　　要：对近年来传入中国的恶性农林杂草薇甘菊Mikaniamicrantha种子的萌发特性进行了研究。结果表明 :在 0 5～ 2cm深度的土壤中 ,随着土层深度的增加而萌发率下降 ,5cm下则没有种子萌发 ;刚成熟的种子萌发率不高 ,在室温 2 5℃下 2个月后达最高 ,而后随着时间的推延萌发率下降 ;薇甘菊种子萌发需要光 ,随着光照强度的增加 ,种子萌发率升高 ;在 5～ 10℃低温贮存条件下的种子比室温 2 5℃贮存的种子有更高的萌发率。Mikania micrantha is a exotic worst weed. A single plant of M micrantha can product a large number of seeds. The germination characteristics of Mikania micrantha were studied. The results showed that the main soil depth for seed emergence was 0 5～2 0 cm, the deeper the soil was, the lower the emergence percentage was. No seedling emerged from seeds located at 5 cm or deeper. The germination percentage of seeds stored for 2 months(25 ℃) was the largest. The germination percentage of seed decreased with the increasing storage time. The seeds of M micrantha were lightly sensitive. Light density can affect the seeds germination of M micrantha. With the increasing of light density, the percentage of germination increased. Germination percentage of seeds stored in low temperature (5～10 ℃) was higher than that of seeds stored in instant temperature.

关 键 词：薇甘菊 种子萌发 光照强度 恶性杂草 萌发率 杂草防治 

分 类 号：S451[农业科学—植物保护] Q945.34[生物学—植物学]