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題 名 | 水稻非破壞性葉面積估算模式之準確度及應用性的比較=A Comparison of the Accuracy and Applicability of Different Models for Non-destructive Leaf Area Estimation in Rice |
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作 者 | 陳烈夫; 呂秀英; 魏夢麗; 呂椿棠; | 書刊名 | 中華農業研究 |
卷 期 | 49:3 2000.09[民89.09] |
頁 次 | 頁1-13 |
分類號 | 434.111 |
關鍵詞 | 水稻; 葉面積; 非破壞性測量; 預測準確度; 模式; Rice; Leaf area; Non-destructive measurement; Accuracy of prediction; Model; |
語 文 | 中文(Chinese) |
中文摘要 | 葉面積是作物生理及農業研究上表示作物生長潛能最有效的測量項 目。葉面積估算模式的發展必須建立在可信且快速的非破壞方法。本研究之目的 在檢測二十四種水稻葉面積估算模式。這些模式都是利用一些田間非破壞性可測 性狀(如葉長、葉寬)乘以某個葉面積係數(K)來估算出全株葉面積,但不同模 式之葉面積係數K的量度方式不儘相同。有些模式是同時測量葉長及最大葉寬, 而有些則是僅測量葉長而已;有些模式需要測量植株上的所有葉片,另有些則僅 利用到部份葉片。本研究以台?8號、台?9號、台?10號及台農67號四個水 稻品種為試驗材料,以進行模式的估算、驗證與評估。由試驗結果得知,雖然不 同節位不同分蘗的葉片都有其個別K值的模式,其用以推估全株葉面積的預測 能力最準確,但卻最耗時費工。縱然水稻劍葉和下位葉的葉相往往有差異,但似 乎不需要區分劍葉和下位葉有不同的K係數。最適模式的選擇主要決定於試驗 探討之目的,若擬評估的基因型數甚多(例如育種施行程序中的試驗),可以利用 所有葉片的葉長和最大葉寬直接乘以一個0.71的平均K值來共同估計四個水稻 品種的全株葉面積,此係數與基因型種類無關。若參試基因型有限但取樣植株很 多時(例如評估環境因素對生長之影響),使用更省工省時的模式是有必要的,像 是僅利用部份葉片(所有下位葉、第2∼4葉、第2∼3葉等)之葉長與最大葉寬的 簡便模式來推估水稻全株葉面積,甚至於僅測量所有葉片或僅測量所有或前三片 下位葉之葉長的簡便模式。但愈是操作簡單迅速的方法,其預測葉面積的準確度 不免降低。在田間實際操作時,葉長的測量會比最大葉寬簡單且準確得多,同時 有利於估算未完全展開葉片的葉面積。 |
英文摘要 | Plant leaf area is a useful observation in physiological and agronomic research. The development of a model for leaf area estimation requires a non-destructive method which is reliable and rapid. The objective of this study was to test twenty-four models for leaf area prediction in rice. Relationships between leaf area and a leaf area coefficient are used, but the coefficients K do not have the same dimension in all models. Some models require the measurement of both the length and the maximum width, others only use the length. Some models require the measurement of all plant leaves, others only measure a few number of leaves. Four rice cultivars, Taikeng 8, Taikeng 9, Taikeng 10 and Tainung 67 were used for model development. Experimental results indicated that different coefficients need not to be calculated depending on leaf position and tiller position. This model predicts the leaf area of an individual plant most accurately, but requires extra time and effort. It seemed that the leaf morphology differ from flag and lower leaves in rice plants, but it is not necessary to use the different K values to predict the total leaf area of an individual plant. The choice of a model depends mainly on the objectives of the investigation. If a large number of genotypes had to be evaluated (e.g. in a breeding programme), an overall average K value of 0.71 from the model with length and width measurements can be used for total leaf area prediction irrespective of the genotype considered. If a limited number of genotypes are studied but a large number of plants are sampled (e.g. to evaluate the influence of environmental factors upon growth), the models consuming less time and effort can be used. These models use the length and width of a few number of leaves (e.g. all the lower leaves, the 2nd~4th leaves or the 2nd~3rd leaves) only, or even require the measurement of length only for all the leaves, all the lower leaves or the first three lower leaves. The more rapid methods provided low accurate estimate of leaf area. The measurement of length is easier under field conditions than width and can be easily extended to the area estimation for non-expanded leaves. |
本系統中英文摘要資訊取自各篇刊載內容。