摘要
以民勤荒漠区典型一年生植物盐生草、碟果虫实和五星蒿为材料,通过不同温度和光照对其种子萌发影响的研究,探索其种子萌发特征。结果表明:在适宜条件下,3种一年生植物在播种后1～4d开始萌发,萌发持续时间为2～12d。根据3种植物种子在不同温度和光照下的开始萌发时间、萌发持续时间和萌发率,最佳萌发温度盐生草为连续光照条件下15℃,萌发率为96.00%±0.00%;碟果虫实为连续黑暗条件下20℃和14h光照/10h黑暗条件下15℃/25℃,萌发率分别为18.00%±2.00%和28.00%±2.31%;五星蒿为连续黑暗条件下20℃和14h光照/10h黑暗条件下15℃/25℃,萌发率分别为96.00%±0.00%和96.00%±2.31%。盐生草和五星蒿种子在连续黑暗、连续光照和14h黑暗/10h光照条件下都能萌发,萌发的最佳光照条件分别为连续光照和连续黑暗,而碟果虫实只有在连续黑暗下才能萌发,光照下几乎不萌发。
A germination experiment on three typical annual plants （Halogeton glomeratus, Corispermum patelliforme and Echinopilon divaricatum） was conducted in the desertifying regions of Minqin under different temperature and light conditions. The objective of the study was to determine the germination characteristics of plant seeds in the desertifying conditions of Minqin. The results show that the three annual plants start to germinate in 1～4 days after sowing and complete germination in 2～12 days under optimum conditions. The optimum germination temperature of H. glomeratus in continuous light is 15 ℃, with a germination percentage of 96.00%±0.00%. For C. patelliforme, the optimum germination temperatures are 20 ℃ and 15 ℃/ 25 ℃ in continuous dark and 14 h light/10 h dark conditions, with respective germination percentages of 18.00%±2.00%, 28.00%±2.31%. In the case of E. divaricatum, the optimum germination temperatures are 20 ℃ and 15 ℃/ 25 ℃ under continuous dark and 14 h light/10 h dark conditions, with respective germination percentages of 96.00%±0.00% and 96.00%±2.31%. H. glomeratus and E. divaricatum can germinate under three different light conditions （continuous light, dark and 14 h dark/10 h light）. C. patelliforme generally germinates under the continuous dark condition and hardly germinates under other light conditions.
出处
《中国生态农业学报》
CAS
CSCD
北大核心
2010年第4期810-814,共5页
Chinese Journal of Eco-Agriculture
基金
国家自然科学基金项目(30960062)
甘肃省自然科学基金项目(3ZSO41-A25-015)
中国科学院西部之光人才计划项目
国家科技支撑计划项目(2007BAD46B02)
甘肃省科技重大专项(0702NKDH030)资助
关键词
温度
光照
一年生植物
开始萌发时间
萌发持续时间
萌发率
民勤荒漠区
Temperature
Light
Annual plant
Initial germination time
Germination duration
Germination percentage
Minqin desertifying region
