Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/28690
標題: 橫山梨(Pyrus serotina Rehder)萌芽生理之探討
Studies on Physiology of Budbreak in 'Heng-Shan' Pear(Pyrus serotina R.) Trees
作者: 盧柏松
Lu, Po-Sung
關鍵字: Heng-shan pear;橫山梨;Budbreak physiology;Carbohydrate;萌芽生理;碳水化合物
出版社: 園藝學系
摘要: 
台東地區橫山梨芽體自9月起萌芽率降低,開始進入休眠 期,11
月下旬至1月上旬為深休眠期,2月以後部份芽體開始覺 醒,而在3月
後解除休眠。枝條全可溶性糖之含量在10月下旬仍 維持很高,之後隨
休眠加深而快速降低,2月以後隨芽體逐漸覺 醒而大幅增加;相對地,
澱粉含量在夏季至秋季間則隨生長季節 之推移而逐漸增加,而在10月下
旬達最高峰,之後略為降低,2 月以後下降較為明顯。而枝條中水分、
蛋白態氮及非蛋白態氮含 量亦隨生長季節推移而逐漸降低,之後隨休眠
解除而逐漸增加, 其中以非蛋白態氮之變化較為明顯。
橫山梨芽體之低溫需求,在離體枝條試驗中顯示,芽體在0、5 及10℃
下均需192小時以上方可打破休眠,三種溫度打破橫山梨 芽體休眠之效
果相同;在盆栽試驗中,橫山梨在5℃下需288小 時以上方可打破休眠
;而以上兩種測試方法均發現低溫處理時間 愈長,50%萌芽所需時間有
愈短之趨勢。橫山梨在低溫不足情形 下,以1:4或1:8濃度之氰氨基化
鈣浸出液處理均可顯著提高萌 芽率,但芽體如完全未經低溫處理則萌
芽率無法達50%,經48 小時低溫處理後復以1:4濃度之氰氨基化鈣催
芽即明顯提高,萌 芽率達50%以上。在芽體未滿足低溫需求前,低溫處
理時間愈長 催芽效果愈好,50%萌芽所需時間有愈短之趨勢。而1:4濃
度之 氰氨基化鈣催芽效果明顯較1:8濃度為佳。
在田間之橫山梨植株在三個不同時間以1:8濃度之氰氨基化 鈣催芽
,結果以12月中旬催芽效果最差,1月中旬及2月中旬催 芽效果較佳,
而在2月中旬催芽後枝條內之全可溶性糖含量有提 早增加之趨勢。故台
東地區橫山梨之適當催芽時期應在1月中旬 以後;而施用氰氨基化鈣液
催芽,過濾或不過濾並不影響催芽之 效果。

Summary
The buds of 'Heng-Shan' pear tree (Pyrus serotina R.) go into
dormancy in September and remain in a state of deep dormancy
from late November to early January. The degree of
dormancy diminish from February and emergces in March in
Taitung prefecture, Taiwan. The total soluble sugar content
of shoots maintained high in late October, then decreased
rapidly during deep dormancy period and thereafter
increased again at budbreak time. The starch content
increased from summer to autumn, and reached the maximum level
in late October , then dropped significantly after
February. Water content , protein nitrogen, and non-
protein nitrogen concentrations of shoots decreased during the
period of deep dormancy and increased when the dormancy
came to an end. Chilling
requirement of single bud cutting of 'Heng-Shan' pear
reached 50% budbreak when shoots was exposed to 0 , 5 and 10℃
for 192 hours. However, in a potted plant test , 50% budbreak
occurred when plants were chilled at 5℃ for 288 hours. The
longer low temperature the shoots or pot plants was
exposed, the shorter time was needed to break buds. Budbreak
was enhanced when insufficiently chilled
shoots or pot plants was treated with 1:4(fertilizer
: water) or 1:8 calcium cyanamide solution. But the
percentage of budbreak could not be able to reach 50% level if
shoots or potted plant were not chilled. The percentage of
budbreak was over 50% when exposed to low temperature(5 or
10℃) for 48 hours together with 1:4 calcium
cyanamide solution. For buds or pot plants not
receiving adequate chilling , the longer the low temperature for
both shoots and pot plants, the better results could be obtained
with calcium cyanamide solution was treated. The ratio of 1:4
calcium cyanamide was found to have more significant effects
on budbreak. Field experiment was showed that induction of
budbreak was least effective when applied in the
middle of December if dormant 'Heng-Shan' pear trees were
sprayed with calcium cyanamide solution(1:8) ,
however, better result could be expected if it was applied
in the middle of January or February. The content of total
soluble sugar increased rapidly and accumulated early in shoots
in the middle February sampling. The optimal time to break
dormancy was in late January in Taitung. Spraying
solution filtering process, in general, did not affect much
in this experiment.
URI: http://hdl.handle.net/11455/28690
Appears in Collections:園藝學系

Show full item record
 

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.