鹽度對水筆仔苗木生長之效應

Effects of Salinity on Growth of Seedlings of Kandelia Candel (L.) Druce

王露儀(Lu-Yi Wang) ； 陳紀伶(Ji-Ling Chen) ； 李明仁(Ming-Jen Lee)

《中華林學季刊》 37卷2期 (2004/06) Pp. 147-155

https://doi.org/10.30064/QJCF.200406.0003

摘要

本研究將水筆仔(Kandelia candel (L.) Druce)胎生苗(viviparous seedling)培育在不同鹽度之介質，以探討鹽度對水筆仔胎生苗生長之影響。研究結果顯示，鹽度對水筆仔苗木之高生長及根頸直徑生長均有顯著之效應，以低鹽度處理者優於對照組及高鹽度處理者。苗木之單株生物量以1%鹽度處理者最高，且隨著鹽度之昇高而下降。鹽度對苗木之S/R率無顯著之效應，惟對苗木之葉部含水率則有顯著之影響。苗木之葉部含水率以3.5%鹽度處理者最高。4%鹽度會嚴重傷害苗木根部，導致苗木100%之枯死率。苗木之總葉面積及葉片數，均隨鹽度之增高而降低。葉重量面積比及葉肉質性均以3%鹽度處理者為最大。

關鍵字

鹽度 ； 水筆仔 ； 淨生長 ； 葉肉質性 ； 葉重量面積比

並列摘要

Viviparous seedlings of Kandelia (Kandelia candel (L.) Druce) were grown in media with various levels of salinity in order to examine the effect of salinity on growth of greenhouse-grown Kandelia seedlings. Sodium chloride (NaCI) was applied to sterilized mixed media in irrigation water to give different salinities of 0% (control), 1%, 2%, 3%, 3.5%, 4%, 4.5%, and 5% NaCI. The results revealed that salinity had significant effects on height growth and root collar diameter growth of Kandelia seedlings. Seedlings grew better in low salinity than the higher ones. Seedling biomass reached the highest amount at 1% salinity, and decreased as salinity increased. Salinity had no significant effect on seedling’s shoot root ratio (SIR), however, it affected leaf water content significantly. Leaf water content of seedling was the highest at 3.5% salinity, 4.0% salinity caused severe damage to seedling roots, and resulted in 100% seedling mortality. Total leaf area and leaf blades per seedling decreased as salinity increased. Seedlings grown in 3% salinity had the highest specific leaf mass area and leaf succulence.

並列關鍵字

Kandelia candel (L.) Druce ； leaf succulence ； net growth ； salinity ； specific leaf mass area