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A Method for testing seed viability of some coniferous trees in Korea
H. S. Park(朴孝燮),D. K. Lee(李敦求),K. B. Yim(任慶彬) 한국육종학회 1983 한국육종학회지 Vol.15 No.3
This study was conducted to examine the possibility of determining the internal characters of four coniferous tree seeds (Pinus densiflora, Pinus koraiensis, Pinus rigida and Larix leptolepis) by X-ray photography, to examine the influence of seed (embryo-endosperm) quality on germination, and to compare the seed germinability between by tetrazolium method and by X-ray contrast method. X-ray photography was a useful tool to measure the embryo and endosperm development of the conifer seeds. The different stages of embryo and endosperm development observed on the photographic plates were classified into 5 embryo-classes (0, I, II, III and IV) and 2 endosperm-classes(A and B). The seeds of Larix leptolepis and Pines rigida were classified into 4 embryo-classes and 2 endosperm-classes. Pines densiflora seeds mostly consisted of III-A and IV-A classes. Many of Larix leptolepis seeds were empty. The seeds of Pinus densiflora and Pinus rigida exhibited mostly IV-A class and those of Pinus koraiensis mostly III-A class. The degree of embryo-endosperm development affected the germinability. The higher was the embryo-endosperm class the better was the germinability of the seed. The seeds belonged to embryo class II were germinated slower than those to classes III and IV. The germination capacity of endosperm class A was better than that of endosperm class B. The results compared between X-ray contrast and tetrazolium methods for examining germinability indicated that the germination values obtained by X-ray contrast method were more closely related to those in an incubator than to those obtained from the tetrazolium method The tetrazolium method was reliable for the rapid determination of seed germinability if treated properly. However, the X-ray contrast method was more precise, simpler and quicker than tetrazolium method for examining seed germinability. Thus, the X-ray contrast method is recommendable to examine seed viability for these four coniferous species.
임경빈,김갑덕,박효섭 한국임학회 1982 한국산림과학회지 Vol.55 No.1
15年生 落葉松林分의 物質生産機構의 把握과 그 生産力을 分析 推定한 結果를 要約하면 다음과 같다. 1. 生産構造面에서 15年生 林分內에 있어서 個體間 生長競爭으로서 被壓된 個體(D=4.7㎝) 優勢한 個體 (D=15.2㎝) 그리고 中間個體(D-10.0㎝) 間에는 幹枝葉의 構成成分別로 본 幹重의 階層別 分布에 큰 差異를 보였으며 光合成部는 地上 4m에서 시작되며 樹冠의 最大光合成層은 大體로 6m에서 나타났다. 2. 葉量의 垂直的 分布를 把握하기 위하여 葉階層量指數, 階層內 幹葉量指數를 計算한바 劣勢木, 中庸木, 優勢木의 分布曲線은 각기 다른 양상을 보였다. 또한 階層內 幹枝量指數도 같은 傾向을 나타냈다. 3. 地上部의 現在量은 樹幹部 47.70ton/ha, 枝部 11.85ton/ha, 葉部가 4.11ton/ha이며, 全體 地上部의 現存量은 63.66ton/ha이었다. 4. 各 年齡別의 樹高 및 胸高直徑에 대하여 樹齡間의 相關을 알기 위하여 相關係數를 計算한 바 5年生의 樹高로서 7∼15年生까지의 樹高生長에 대한 推定이 可能하고 胸高直徑에서는 5年 以上에서 15年까지의 生長에 대한 推定이 可能한 것으로 나타났다. 5. 年純生産量은 樹幹部 9.94ton/ha·yr, 枝部 1.79ton/ha·yr, 葉部가 4.11ton/ha·yr이었다. 年純生産量에서 全體에 對한 各 器管別의 比率은 樹幹部가 62.8%, 枝部 11.3%, 葉部 25.9%로서 枝, 葉部가 樹幹部에 비해 낮았다.
Studies on seed viability of some coniferous trees in Korea
임경빈,이돈구,박효섭 한국임학회 1983 한국산림과학회지 Vol.61 No.1
This study was conducted 1) to examine the possibility of determining the internal characters by X-ray photography, of the seeds of four conifers; Pinus densiflora, Pinus koraiensis, Pinus rigida and larix leptolepis, 2) to examine the influence of a seed (embryo-endosperm) quality on germination, and 3) to compare the seed germinability between by tetrazolium method and by X-ray contrast method. X-ray photography was a useful tool to measure the embryo and endosperm development of the coniferous seeds. The different stages of embryo and endosperm development observed on the photographic plates were classified into 5 embryo-classes (O, I, II, III and IV) and 2 endosperm-classes(A and B). The seeds of Larix leptolepis and Pinus rigida were classified into 4 embryo-classes and 2 endosperm-classes, whereas those of Pinus koraiensis were classified into 3 embryoclasses and 2 endosperm-classes. Larix leptolepis seeds mostly consisted of III-A IV-A classes. However, many of Larix leptolepis seeds were empty. The seeds of Pinus densiflora and Pznus rigida exhibited mostly IV-A class and those of Pinus koraiensis mostly III-A class. The degree of embryo-endosperm development affected the germinability. The higher was the embryo-endosperm class the better was the germinability of the seed. The seeds belonged to embryo class II were germinated slower than those to classes III and IV. The germination capacity of endosperm class A was better than that of endosperm class B. The results compared between X-ray contrast and tetrazolium methods for examining germinability exhibited that the germination values obtained by X-ray contrastmetriod were more closely related to those in an incubator than to those obtained from the tetrazolium method. The tetrazolium method is reliable for the rapid determination of seed germinability if treated properly. however, the X-ray contrast method was more precise, simpler and quicker than tetrazolium method for examining seed germinability. thus, X-ray contrast method is recommendable to examine seed viability for coniferous species.