Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/65735
標題: Effects of Nitrogen Sources on Growth and Physiological Responses of Scaevola sericea and Messerschmidia argentea Seedlings
氮型態對草海桐及白水草苗木生長及生理反應之影響
作者: 劉銘煌
Liu, Ming-Hwang
關鍵字: Nitrate;硝酸態氮;Ammonium;銨態氮
出版社: 森林學系
摘要: 
本研究旨在探討不同型態氮素處理對草海桐(Scaevola sericea)及白水
草(Messerschmidia argentea)苗木生長及生理反應之影響,即苗木施
用NH4+/NO3-比例為0/100、25/75、50/50、75/25、100/0及對照組等 6種
不同肥料處理後,按每星期量測苗木的累積苗高及地際直徑生長變化,並
取樣測定苗木的總葉面積及各部位的累積乾重等形質參數,且測定葉片的
葉綠素含量,植物體各部位的礦質養分含量及土壤pH之變化,以瞭解不同
型態氮素對草海桐及白水草苗木形質生長及生理品質的影響。由不同型態
氮肥試驗結果顯示,草海桐苗木的地際直徑生長及各部位乾重等形質生長
,以銨態氮(NH4+)施用較多之50/50、75/25及100/ 0比例者較佳,顯示
草海桐苗木較偏好NH4+施肥量較多者。白水草苗木之累積高生長,地際直
徑生長及總乾物重等形質生長,以硝酸態氮(NO3-)施用較多之0/100
、25/75及50/50比例者較佳,顯示白水草苗木較偏好NO3-施肥量較多者。
苗木的葉綠素含量,草海桐苗木以完全為銨態氮處理的100/0比例者較高
。二種苗木經不同型態氮素處理後植物體各部位礦質元素之變化,混合氮
源處理可提高葉部N含量,而減少葉部K含量。土壤pH之變化,在鹹性(
pH8.2)的培養介質中,施用不同型態的氮素後,土壤pH皆呈下降趨勢。

The purpose of this study was to investigate the effect of
nitrogen sources on growth and physiological responses of
Scaevola sericea and Messerschmidia argentea seedlings.
Seedlings were subjected to 6 different levels of NH4+/NO3-
ratios, i.e. 0/100、25/75、50/50、75/25、100/0 and control,
respectively and growing for 5 months. The changes of
morphological parameters(i.e. plant height and diameter at
root collar,total leaves area ,plant dry matter) and
physiological parameters(i.e. chlorophyll content,mineral
nutrient content) and pH value of medium in response to
fertilization were measured. The results obtained from the
experiment exhibited that seedlings of Scaevola sericea treated
with more NH4+ fertilizer (i.e.50/50、75/25 and 100/100ratio)
had higher seedling diameter and plant dry matter.Seedling of
Messerchmidia argentea treated with more NO3- fertilizer(i.e.
0/100、25/75 and 50/50 ratio)had higher seedling height,
seedling diameter and plant dry matter. Seedling of Scaevola
sericea treated with only NH4+ (100/0) fertilizer had higher
chlorophyll content. For both species ,fertilization with mixed
nitrate and ammonium the N content of leaves was increased,on
the other hand , K content was decreased. The pH values of
medium, in original pH value(8.2), was falls after fertilized.
URI: http://hdl.handle.net/11455/65735
Appears in Collections:森林學系

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