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潮汐淹水时间对秋茄幼苗生长的影响

, PP. 141-147

Keywords: 秋茄,生长,最佳淹水时间,临界淹水时间

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Abstract:

模拟正规半日潮淹水的条件下,不同淹水时间对秋茄[Kandeliacandel(L.)Druce]幼苗生长的影响.应用沙和土两种培养基质,制备盐度为15的人工海水栽培幼苗培养时间为70d.不淹水(0h)和长时间淹水(>8h)对秋茄幼苗的生长有一定的抑制作用,而短时间淹水(淹水2~4h)对幼苗生长有所促进.较长时间的淹水可促进贮气根的数量增加和长度的增长.在当前培养条件下,秋茄幼苗生长的最佳淹水时间是每个潮水循环淹水2~4h.2h处理的沙培秋茄幼苗总生物量和成熟叶面积最大,胚轴失重最小,土培幼苗也有相应的变化趋势.秋茄幼苗生长的临界淹水时间是每个潮水循环淹水8h.秋茄幼苗有较强的抗淹水能力,适当的淹水对其生长有利.

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