查詢結果分析
來源資料
相關文獻
- Application of a Nonlinear Mixed-effects Model to Assess the Effects of Nursery Nitrogen Fertilization on Seedling Height Growth of Taiwan Yellow False Cypress
- 三種臺灣針葉樹材香味成分之分離與鑑定
- 臺灣扁柏氣味對人體生理與心理反應的影響(1)--吸入氣味後人體血壓與脈搏之變化
- Natural Seeding and Seedling Occurrence in the Chamaecyparis Forest at Chilan Mt. Area
- RAPD Variation in Relation to Population Differentiation of Chamaecyparis formosensis and Chamaecyparis taiwanensis
- 臺灣扁柏與紅檜原生質體融合之初步研究
- 紅檜與臺灣扁柏種子在不同水逆境模式下之發芽
- Regeneration Patterns of Yellow Cypress on down Logs in Mixed Coniferous-Broadleaf Forest of Yuanyang Lake Nature Preserve, Taiwan
- Isolation and Culture of the Protoplast of Chamaecyparis Spp.
- 棲蘭山檜木天然更新地--臺灣扁柏幹形與樹冠構造之研究
頁籤選單縮合
題 名 | Application of a Nonlinear Mixed-effects Model to Assess the Effects of Nursery Nitrogen Fertilization on Seedling Height Growth of Taiwan Yellow False Cypress=利用非線型混合效應模式評估苗圃氮施肥對臺灣扁柏苗木高生長之效應 |
---|---|
作 者 | 關秉宗; 張宗怡; 施佩君; 林世宗; | 書刊名 | 臺灣林業科學 |
卷 期 | 21:1 民95.03 |
頁 次 | 頁63-74 |
分類號 | 436.253 |
關鍵詞 | 臺灣扁柏; Logistic生長曲線; 非線型混合效應模式; Chamaecyparis obtusa var. formosana; Logistic growth curve; Nonlinear mixed-effects model; |
語 文 | 英文(English) |
中文摘要 | 許多施肥試驗均為重複觀測試驗,而苗木之生長反應常為非線型。以往受分析方法之限制,常以線型混合效應模式分析施肥試驗。此種分析方式常使統計分析之靈敏度降低,進而可能導至錯誤結論。本研究利用三參數logistic混合效應模式重行評估Shih and Guan (1998) 之苗圃氮施肥對臺灣扁柏苗木高生長之效應試驗,以其瞭解所用之非線型模式是否可進一步提供新的訊息。該試驗為一完全逢機設計,包含五種不同施肥濃度(0, 50, 100, 150, and 200 kg ha-1),每一濃度重複6次。苗木高生長自施肥完成後開始量度,其後每隔40日量度一次,共量度6次。本研究將 logistic模式中之苗高漸進線視為逢機效應參數,而將苗高生長曲線之轉折點與模式之形數參數視為固定效應,並以一次自迴歸過程解釋相鄰觀測間之自我相關。結果顯示苗高對氮施肥量呈近似線性之反應,每公頃每增加50公斤之氮,苗高平均增加1.4公分。一般而言,無論何種施肥量,苗木高生長約在施肥完成後37天到達生長轉折點,而在達到轉折點後53天,苗高到達該生長季最大高度的3/4。本研究顯示,雖然苗圃氮施肥量對臺灣扁柏之苗高具統計上顯著之效應,但其生物上之效應實屬有限。同時因施肥量並不會影響苗高生長到達轉折點與達到生長季最大高度3/4時所需時間,是以應有其他因子控制生長季內苗高生長歷程。 |
英文摘要 | A mixed-effects three-parameter logistic model was used to reevaluate the results from an experiment originally carried out in 1997, which examined the effects of 5 nitrogen fertilization levels (0, 50, 100, 150, and 200 kg ha-1) on nursery seedling height growth of Taiwan yellow false cypress (Chamaecyparis obtusa Sieb. & Zucc. var. formosana Rehder) over a 200-d period. The experiment design was a completely randomized design with 6 replications for each level. For each replication, 6 height measurements were taken at 40-d intervals over the period. The asymptote of the logistic model for each replication was regarded as a random effect parameter that varied according to the level of fertilization, whereas the inflection point and the scale of the model were treated as fixed-effect parameters. A first-order autoregressive process was used to model the correlations between the repeated measurements. Results suggested that the seedling height asymptotically increased as the amount of fertilization increased linearly, with an estimated average rate of increase of about 1.4 cm per 50 kg ha-1 of additional nitrogen. The inflection point occurred at about 37 d after the first measurement was taken, and the average seedling height reached about 3/4 of each experimental unit’s asymptote about 53 d latter. Although the fertilization effects were statistically significant, the biological significance was limited. Both the inflection point and the scale parameter were unaffected by fertilization, implying that factors other than the nitrogen supply might be controlling the seedling height growth pattern. Thus, using the new model indeed provided important new information on the effects of nursery fertilization on the seedling height growth of Taiwan yellow false cypress. |
本系統中英文摘要資訊取自各篇刊載內容。