Search Results 1-20 of 141

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Anatomical traits of Cryptomeria japonica tree rings studied by wavelet convolutional neural network

Nakajima T , Kobayashi K , Sugiyama J

… Tree ring analysis is an important field of science, and is vital in modeling the environmental response system of tree growth. … In most cases, analyses have been conducted using one parameter from one tree ring, e.g., ring-width, density, or ratio of stable isotopes. …

IOP Conference Series: Earth and Environmental Science (415), 2020-02

IR
2

Effects of Climate Factors on the Tree-ring Structure of Cryptomeria japonica in Central Japan [in Japanese]

Hirano Yu , Saitoh Taku M. , Fukatsu Eitaro , Kobayashi Hajime , Muraoka Hiroyuki , Shen Yudong , Yasue Koh

中部地方におけるスギの年輪構造に及ぼす気候要素の影響を明らかにした。岐阜大学高山試験地常緑針葉樹林内の33個体のスギ造林木からコア試料を採取した。軟Ｘ線デンシトメトリーによって年輪幅，年輪内平均密度，早材幅，晩材幅，早材密度，晩材密度を測定し，年輪幅と年輪内平均密度の積から年輪重量成長量を算出した。それぞれの年輪要素について生育地を代表する時系列であるクロノロジーを構築した。各ク …

Mokuzai Gakkaishi 66(3), 117-127, 2020

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3

Development processes and growth limiting factors of underground part of trees on permafrost derived from tree rings [in Japanese]

Yasue Koh , Osawa Akira , Matsuura Yojiro , Otake Satoko , Kanematsu Marie , Mishina Fumiya , Noguchi Kyotaro , Morishita Tomoaki , Shirota Tetsuoh , Ruess Roger , Hollingworth Jamie

永久凍土上に生育するブラックスプルース(Picea mariana)について，年輪年代学的手法を用いて，１）根の発達過程と土壌環境変化の関係，２）肥大成長と気候要素との関係を明らかにした。アラスカ州カリブーポーカークリーク長期生態観測サイト北東向き斜面にサイトを設定した。１）について，サイトにつき5個体から株部分を採取し，年輪幅測定と目視によ …

The Japanese Forest Society Congress 131(0), 258, 2020

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4

Methods for Nutrient Diagnosis of Fruit Trees Early in the Growing Season by Using Simultaneous Multi-element Analysis

Matsuoka Kaori

… Fruit tree nutrition is one of the most important factors in terms of growth and productivity. … This review explores how nutrient imbalances affect the yield and fruit quality of fruit trees, and presents methods for diagnosing fruit tree nutritional disorders in order to correct nutritional deficiencies. …

The Horticulture Journal 89(3), 197-207, 2020

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5

Survival and Growth of Planted Young Picea jezoensis Trees in Response to Various Environmental Factors near Lake Akan, Eastern Hokkaido, Japan [in Japanese]

高橋朋佳 , 大和瑠理 , 佐藤駿 , 酒井賢一 , 時田勝広 , 寺澤和彦 , Tomoka Takahashi , Ruri Yamato , Shun Sato , Ken-ichi Sakai , Katsuhiro Tokita , Kazuhiko Terazawa

… Timber resources of Ezo spruce, Picea jezoensis (Siebold et Zucc.) Carrière, a coniferous tree species representative of natural forests in Hokkaido, northern Japan, have declined due to intensive logging activities and the difficulty of natural regeneration in this species. … To obtain technical information for the improvement of artificial Ezo spruce regeneration, we investigated the growth and survival of planted young trees in approximately 30 stands in the forest surrounding Lake Akan, eastern Hokkaido, Japan. …

東京農業大学農学集報 = Journal of agriculture science, Tokyo University of Agriculture 64(3), 75-82, 2019-12

IR
6

Response of juveniles of seven forest tree species and their populations to different combinations of simulated climate change-related stressors : spring-frost, heat, drought, increased UV radiation and ozone concentration under elevated CO₂ level

Pliura Alfas , Jankauskiene Jurga , Bajerkeviciene Gintare , Lygis Vaidotas , Suchockas Vytautas , Labokas Juozas , Verbylaite Rita

Journal of plant research 132(6), 789-811, 2019-11
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Study of Tree Growth Response to Climate Using Dendrochronological Methods [in Japanese]

桃井尊央

木材工業 = Wood industry 74(8), 300-305, 2019-08
8

Evaluation of O3 Effects on Cumulative Photosynthetic CO2 Uptake in Seedlings of Four Japanese Deciduous Broad-Leaved Forest Tree Species Based on Stomatal O3 Uptake

Yamaguchi Masahiro , Kinose Yoshiyuki , Matsumura Hideyuki , Izuta Takeshi

… Seedlings of four representative Japanese deciduous broad-leaved forest tree species(Fagus crenata, Quercus serrata, Quercus mongolica var. … japonica)were exposed to different O3 concentrations in open-top chambers for two growing seasons.The photosynthesis-light response curves (A-light curves) and stomatal conductance were measured to estimate the leaf-level cumulative photosynthetic CO2 uptake (∑Pn_est) and POD, respectively. …

Forests 10(7), 556, 2019-07-02

IR
9

Divergent tree growth response to recent climate warming of Abies faxoniana at alpine treelines in east edge of Tibetan Plateau (SPECIAL FEATURE : Climate Change and Biodiversity Conservation in East Asia as a token of memory for the 7th EAFES in Daegu, Korea)

Zhang Yuandong , Guo Mingming , Wang Xiaochun , Gu Fengxue , Liu Shirong

Ecological research 33(2), 303-311, 2018-03
10

Induced and spontaneous self-compatible mutants as tools for the study of self-incompatibility systems and as genetic resources for breeding in fruit crops of Rosaceae [in Japanese]

Mase Nobuko

… genes were indispensable for a stylar self-incompatible response in all members of the Rosaceae studied to date. … Recently, our group developed a PPM of Japanese pear, which was identified from among male-derived progeny of a gamma-irradiated tree. …

Regulation of Plant Growth & Development 53(2), 124-130, 2018

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11

Interspecific differences in the hierarchical cluster structure of leaves within tree crowns in Indochina

Mochizuki Takaharu , Marod Dokrak , Trieu Dang Thinh , Mizunaga Hiromi

… Specifically, morphological differences in leaf clusters were examined among ecological functional groups of tree species. … An ordination technique was used to organize crown architecture into two axes: one corresponding to the directional dependency of light capture, which separates leaf phenological types, and the other representing the spatial scale contributing to light capture, which separates growth forms. …

Tropics 27(1), 1-24, 2018

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12

Tree Physiological Ecology under Elevated Ozone and CO2 [in Japanese]

Watanabe Makoto

森林の健全性を維持するためには人間活動の活発化に伴う大気環境の変化に対する樹木の応答を考慮する必要がある。著者は共同研究者とともにオゾンと高濃度二酸化炭素(CO2)に対する樹木の応答に関する研究に生理生態学的な視点から取り組んできた。本稿ではその研究成果を概説する。オゾンに関しては、光合成応答のメカニズム、実験的研究に基づいた日本の代 …

Journal of Japan Society for Atmospheric Environment / Taiki Kankyo Gakkaishi 53(2), 62-69, 2018

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13

The effects of nickel in the soil of a deserted asbestos mine on the germination of Betula platyphylla var. japonica and Alnus hirsute [in Japanese]

平林毅一郎 , 木村徳志 , 鴨田重裕 , 楠本大

論文

東京大学農学部演習林報告 = Bulletin of the University of Tokyo Forests (135・136), 15-25, 2017-08

IR
14

Changes and Local Adjustment in the Faidherbia Albida Use as Fodder and Fuelwood among the Sereer, Senegal

HIRAI Masaaki

… Despite numerous studies on the potential functions of Faidherbia albida, farmer's contexts and practices in the tree use are largely unknown. … The study described how the Sereer reshaped their techniques of foliage and branch collection for fodder and fuelwood in response to socio-economic changes. … Married men turned to fattening livestock to highly increase its cash value, and promoted foliage growth through careful pruning to use as fodder. …

African Study Monographs 38(1), 27-49, 2017-03

IR DOI
15

Response of growth and carbon allocation of Japanese forest tree species to elevated ozone [in Japanese]

Watanabe Makoto , Kinose Yoshiyuki , Hoshika Yasutomo , Agathokleous Evgenios , Koike Takayoshi , Matsumura Hideyuki , Kohno Yoshihisa , Izuta Takeshi

オゾンは植物に対する毒性が高いガス状大気汚染物質であり、森林の樹木に対する悪影響が懸念されている。これまでに日本の樹木に対するオゾンの影響に関する実験的研究が行われ、成長低下や地上部と地下部の乾重量比(S/R比)の増加などが報告されてきた。本研究ではそれらの文献(合計27報、15樹種)を調査し、40 ppbを超えたオゾンの積算暴露量(AOT40)と成長低下率またはS/R比の変化率 …

The Japanese Forest Society Congress 128(0), 724, 2017

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16

Effects of Site Environmental Factors and Stand Conditions on Growth of the Lacquer Tree, Toxicodendron vernicifluum for Evaluation of Suitable Plantation Sites [in Japanese]

Tanaka Koji , Tabata Masanobu , Ida Akimitsu , Tsuchiya Satoshi , Koiwa Toshiyuki , Matsumoto Noriyuki , Nakamura Koichi , Takada Morio , Hirai Keizo , Hiraoka Yuichiro

日本産漆の需要量が高まる中，今後の日本産漆を安定的に供給するため，ウルシの資源増産が必要であり，そのためには植栽適地を評価することが緊急かつ重要な課題となっている。本研究では青森県，岩手県，新潟県，茨城県４県における１１１カ所のウルシ林分を対象として，植栽木の成長と複数の立地環境および林分状況との関係を調べた。応答変数を胸高直径の林分平均値，説明変数を六つの固定効果（立木密度，斜 …

Journal of the Japanese Forest Society 99(3), 136-139, 2017

J-STAGE JASI
17

Changes in the stand structure over a half-century in an old-growth Abies-Fagus forest [in Japanese]

WAKAMATSU Nobuhiko , ISHIDA Yuko , FUKAMACHI Atsuko , HIGA Motoki , YOSHIDA Keiichiro , KIKUCHI Takao

1.　仙台平野の西縁に位置する青葉山丘陵の鈎取山国有林内で，発達したモミ－イヌブナ林の50年間の遷移を実証的に明らかにし，維持機構を考察した．2.　50年間で，調査区（20 m×150 m; 樹高2 m以上の個体をセンサス）の構成樹種の種構成に大きな変化は見られなかった．しかし，モミなどの常緑針葉樹種の個体数は増加していたが，イヌブナなどの林 …

Vegetation Science 34(1), 39-53, 2017

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18

Response of tree growth and wood structure of Larix kaempferi, Kalopanax septemlobus and Betula platyphylla saplings to elevated CO2 concentration for 5 years exposure in a FACE system

Watanabe Yoko , Wakabayashi Keita , Kitaoka Satoshi , Satomura Takami , Eguchi Norikazu , Watanabe Makoto , Nakaba Satoshi , Takagi Kentaro , Sano Yuzou , Funada Ryo , Koike Takayoshi

Trees : structure and function 30(5), 1569-1579, 2016-10

IR
19

Evaluation of Salt Tolerance in Candidate Elite Eucalyptus globulus Conal Plants and Field Test

Fujii Yuji , Suyama Kenichiro , Hayashi Kazunori , Tanabe Toshiaki , Kawaoka Akiyoshi

… Twenty three elite tree candidates that had been selected for their superior growth rate (1.5 times or more greater timber volume relative to maximum girth of tree) 5 years after being planted in a Eucalyptus globulus afforested area in Western Australia were cloned using a tissue culture technique. … A comparison of the growth rate of the cloned seedlings indicated that Clone A grew the most with the saline-treatment. …

JAPAN TAPPI JOURNAL 70(12), 1301-1309, 2016

J-STAGE
20

Species-dependency of tree growth and climate response using the tree-ring stable isotope analysis in adjacent forests [in Japanese]

Takeda Yusuke , Kominami Yuji , Kanazawa Yoiti , Nanami Satoshi , Itoh Akira

古気候復元や樹木の気候応答の解明のために、樹木年輪の幅や炭素安定同位体比、酸素安定同位体比が用いられている。しかし、年輪幅やδ13Cでは樹齢や長期の群落構造変動の影響を受けやすいため個体間同調性が十分ではなく、δ18Oでは技術的な面で研究例が少ないため、それぞれの関係性や樹種ごとの変動と気候応答ついては評価が十分ではない。本研究の試験地である大阪府交野市の大阪市立大学理学部附属植物園は1950年代 …

The Japanese Forest Society Congress 127(0), 576, 2016

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