頁籤選單縮合
題名 | 臺灣杉毬花之生長及分佈與樹冠微環境之關係=Relations of Growth and Distribution of Strobili to Microenvironmental Conditions of a Crown of Taiwania cryptomerioides Hay. |
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作 者 | 郭幸榮; 徐新武; 鍾年鈞; 梁亞忠; | 書刊名 | 國立臺灣大學農學院實驗林研究報告 |
卷期 | 13:3=225 1999.09[民88.09] |
頁次 | 頁181-191 |
分類號 | 436.26 |
關鍵詞 | 空間統計; 累積溫量; 累積光量; 帶狀分佈; Spatial statistics; Heat accumulation; PAR accumulation; Band distribution; |
語文 | 中文(Chinese) |
中文摘要 | 本研究目的乃期望建立臺灣杉雌、雄毬花之生長及在樹冠之分佈與其微環境條件 的關係,作為生殖物候學系統研究之基礎。研究方法係在樹冠架設溫度、光量及空氣相對濕 度感器,測定自 1998 年 9 月 1 日至 1999 年 5 月 1 日樹冠不同位置微氣象之變化,同 時段也觀測花芽的生長及發育狀況。研究結果獲悉樹冠南向較北向有較多的累積光量及累積 溫量,樹冠上層的累積光量及累積溫量也較下層為高。雌、雄毬花之大小及著生之頻度在南 向者皆較北向者為大。雌毬花分佈在上冠層,帶幅較窄;雄毬花分佈在中、下冠層,帶幅較 寬。這些結果顯示花芽的生長、分佈可能受累積光量及累積溫量所影響。另以空間統計法以 同一株樹冠上 19 樣點之實測溫度估算測點間之溫度,獲悉在夜晚及雨天的估算效果較白天 及晴天為佳,樹冠上層及最下層的溫度變化也較樹冠中部為大。因此,建議感測器的數量及 置放的位置應視研究目的而做適當的調整。 |
英文摘要 | The study was aimed to establish the relations of growth and distribution of female and male strobili to their microenvironmental conditions, and would be regarded as the preliminary work of further serial study on phenology of reproductive growth. We mounted the thermo-, quantum-, and relative humidity-sensors on a crown to monitor the variation of micro-weather conditions from September 1, 1998 to May 1, 1999. During this period, we also investigated growth and development of both female and male strobili. The results indicated the accumulations of both heat and PAR (photosyntheically active radiation) of southern aspect of crown were higher than those of northern one. Both heat and PAR accumulations were larger at upper layer than those at lower layer of crown. According to the comparisons of size and frequency of appearance of both female and male strobili, southern aspect of crown was better than those of northern one. The narrow distribution band of female strobili at upper layer were compared to wider distribution band of male strobili at mid and lower layers of crown. The results implied that the growth and distribution of both female and male strobili might be influenced by accumulations of heat and /or PAR. The study also estimated the mean hourly temperature based on the measured data of 19 thermo-sensors with spatial statistics. The results showed the reliability of estimations of night-time and rainy days was better than those of day-time and clear days. The temperature variations of both upper and lower layers were more drastic than those of mid layer of crown. Therefore, we suggested the number and mounted position of thermo-sensor should be modulated to respond the purpose of study. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。