采用不同播种时间、果皮处理方式、盐度-淹水交互条件对银叶树Heritiera littoralis播种育苗进行试验。结果表明,冬末初春播种的种子萌发所需时间均显著高于春末、夏季的播种处理,而春季初夏所需的萌发时间则与盛夏初秋没有明显差异。脱壳、破壳处理有效缩短银叶树种子的萌发时间;破壳处理的种子萌发率(88.9%)明显高于脱壳处理(74.4%)。银叶树种子播种期最适宜采用淡水浇灌,且减少淹水次数,均有利于种子萌发率的提升。萌发过程中可溶性糖及总酚含量在低盐度、低淹水频率条件下含量更低。种子经风干储藏于次年4~6月播种,可有效减少苗圃维护时间和成本,同时缩短种子萌发周期。
The influence of different sowing times, physical treatments of seeds, and interaction between salinity and inundation regime to the germination of Heritiera littoralis was explored. The durations of seed germination sowed in autumn-winter and early spring were longer than those in late spring and summer, while no significant difference of germination duration existed between seedlings sowed in April to June and July to September. Physical treatment on pericarps obviously affected germination time and rate, then affected their growth later. The germination time was shortened by entirely and partially shelled treatment. But germination rate of partially shelled treatment was 88.9%, which was significantly higher than that of entirely shelled as 74.4%. Moreover, the seedlings of entirely shelled treatment grew faster and more robust. Salinity and inundating frequency, also their interaction had strong impacts on seed germination of H. littoralis. Indicating irrigation with freshwater and reduction of inundation frequency may facilitate the germination of H. littoralis. Soluble saccharides and polyphenol were statistically lower in condition of lower salinity and inundating frequency. Since the germination state of H. littoralis were sensitive to temperature, it was recommended to carry out sowing in April to June after collection of mature capsule collected in the last autumn with dry-storing. Such measurement could effectively lower duration and cost of nursing, and reduce germination duration of seeds.