Search Results 1-20 of 92

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  • Detection of tree root systems using ground penetrating radar with dual-frequency digital antenna  [in Japanese]

    Hirano Yasuhiro , Tanikawa Toko , Todo Chikage , Yamase Keitaro , Doi Ryuusei , Yoshida Gen , Nishimura Rei , Sawashi Moe , Ikeno Hidetoshi

    <p>樹木根系を掘らずに非破壊推定する方法として地中レーダ法が提案されている。樹木根系の探査には、900 MHzから1500 MHzまでの一つのアンテナ周波数をもつ地中レーダが用いられ、深さ50㎝程度までに広がる根直径1㎝以上の水平根が検出されてきた。レーダ周波数は低周波ほど深い位置の根を、高周波ほど浅い位置の根の検出を可能とする。近年二周波のアンテナで同時探査可能な地中レーダが開発さ …

    The Japanese Forest Society Congress 131(0), 336, 2020

    J-STAGE 

  • <b>High root penetrating ability in upland rice under drought conditions<b> during the terminal growth stage</b></b>  [in Japanese]

    Nguyen Hien Thi Thanh , KOBATA Tohru , SAITOH Kuniyuki

    Abstracts of Meeting of the CSSJ 247(0), 87, 2019

    J-STAGE 

  • Cuttings of Lindera umbellata Thunb. and Lindera umbellata Thunb. var. membranacea

    UEHARA Iwao

    … 10cm and 20cm long and planted in a planter (60cm long × 22cm wide × 16cm depth). … However, the percentage of rooting for Lindera umbellata Thunb. …

    中部森林研究 = Chubu forestry research (65), 11-14, 2017-04

    IR  DOI 

  • Developmental Plasticity of Rice Root System Grown under Mild Drought Stress Condition with Shallow Soil Depth; Comparison between Nodal and Lateral roots

    Kameoka Emi , Suralta Roel Rodriguezc , Mitsuya Shiro , Yamauchi Akira

    … We used six genotypes including KDML105 (indica, lowland adapted), a high lateral rooting ability genotype. … The plants were grown up to heading or maturity stage for two years under soil with limited soil depth (20 cm) assuming the presence of the hardpan and at different moisture gradients generated by the line source sprinkler system. …

    Plant Production Science 19(3), 411-419, 2016-05

    IR 

  • Suitability of Welsh onion and broccoli cultivation in a heavy clay field equipped with a subirrigation and drainage system  [in Japanese]

    細野 達夫 , 池田 順一 , 大野 智史 [他] , 鈴木 克拓 , 谷本 岳 , 片山 勝之 , 関口 哲生 , 関 正裕

    重粘土FOEAS圃場への葉茎菜類の適応性を評価するため,夏どりネギ(短葉性根深ネギ)と秋どりブロッコリーの栽培試験を行い,以下の結果を得た。1. 本研究では,地下水位制御を行わない開放区においても根域の土壌水分不足をきたすことは無く,継続的な地下水位制御の有無によるネギ,ブロッコリーの生育・収量の差異は概ね小さかった。2. ただし,多雨条件となった2011年の秋どりブロッコリー栽培期間中には,制御 …

    中央農業総合研究センター研究報告 (23), 1-19,21-22, 2015-02

    IR  DOI  JASI 

  • The effect of seed size on seedling growth and drought tolerance of the restoration shrub <I>Caragana korshinskii</I> Kom. in China  [in Japanese]

    SAI Min , MASUDA Tatsushi , HARA Eijiro , YAMANAKA Norikazu , KINUGASA Toshihiko

    中国における主要な緑化用灌木である <I>Caragana korshinskii</I> Kom.について,種子サイズによる実生の乾燥耐性の違いを評価した。小種子(20~37 mg) 由来の実生の乾燥重量は大種子(73~90 mg) 由来の実生の60 %程度だったが,どちらにも乾燥ストレスによる成長抑制はみられなかった。小種子由来の実生はバイオマスは小さいものの分枝が少な …

    Journal of the Japanese Society of Revegetation Technology 41(1), 51-55, 2015

    J-STAGE 

  • Examination of Vertical Distribution of Fine Root Biomass in a Tropical Moist Forest of the Central Amazon, Brazil

    NOGUCHI Hideyuki , SUWA Rempei , SOUZA Cacilda Adélia Sampaio de , SILVA Roseana Pereira da , SANTOS Joaquim dos , HIGUCHI Niro , KAJIMOTO Takuya , ISHIZUKA Moriyoshi

    … The regressions on the cumulative fine root biomass along soil depth (at 5 cm intervals from 0-40 cm in depth) revealed significantly different vertical distribution of fine root biomass among three topographic habitats (lower-slope valley called <i>baixio</i>, mid-slope, and upper-slope plateau). … A shallower rooting pattern was observed in the plateau than the other habitats, while fine root biomass was larger in the <i>baixio</i> …

    Japan Agricultural Research Quarterly: JARQ 48(2), 231-235, 2014

    J-STAGE 

  • Tillage pan breaking improves nitrogen budget of onion field in Okhotsk region  [in Japanese]

    SUZUKI Keijiro , NAKAMURA Ryuuichi

    余剰水量が少なく,地下水の硝酸汚染に対して脆弱なオホーツク地域において,タマネギ畑の耕盤層の全層破砕処理による根域拡大が窒素収支改善などの環境保全面に及ぼす効果を無施工あるいは通常の心土破砕を対照として検討した.耕盤層の全層破砕は,20〜40cm土層の容積重の低下および気相率の増加,耕盤層出現深の増大をもたらし,根域の深さを約2倍に拡大した.それに伴い,窒素吸収量,総乾物重および収量が,それぞれ有 …

    Japanese Journal of Soil Science and Plant Nutrition 85(1), 17-25, 2014

    J-STAGE  JASI 

  • Genetic improvement of drought resistance using gene associated with deep rooting in rice  [in Japanese]

    Uga Yusaku

    干ばつは,天水条件で栽培されるイネにとって生産性を低減させる最も深刻なストレスの1つである.干ばつ耐性を向上させるうえで,根系形態に対するゲノム育種が有効な手段の1つと考えられる.しかし,これまでに根系形態の自然変異に関与する遺伝子はイネでは単離されておらず,根系改良が耐乾性の向上に本当に寄与するのか明らかでない.筆者は,イネの第9染色体に見出した根伸長角度に関与する量的形質遺伝子座(<i& …

    Root Research 22(4), 131-139, 2013

    J-STAGE 

  • Effect of Deep Planting and Deep-flood Irrigation on the Yield and Quality of Rice  [in Japanese]

    Chiba Masahiro , Matsumura Osamu , Terao Tomio , Takahashi Yoshihiko , Watanabe Hajime

    近年の気候温暖化で水稲の登熟期間中の気温が上昇し,白未熟粒の多発による品質低下が問題となっている.深水栽培は白未熟粒の発生抑制に有効であるが,効果の大きい水深18 cmの深水栽培が可能な圃場は限られる.そこで,高温登熟耐性が弱の初星と中程度のコシヒカリを用いて,慣行栽培と水深18 cmの強深水栽培に加えて,深水栽培と同様に分げつ発生を抑制する深植(植付深6 cm)と,比較的水深が浅い弱深水栽培(水 …

    Japanese Journal of Crop Science 80(3), 312-325, 2011

    IR  J-STAGE  JASI 

  • JIRCAS's Research Activities Targeting at Improvement of Rice Varieties for Africa

    神代 隆 , Kumashiro Takashi

    … As one of the indicators of drought tolerance, rooting depth is used. …

    農学国際協力 (8), 237-245, 2010-02

    IR  DOI 

  • Effects of Subsoiling to the Non-tilled Field of Wheat-Soybean Rotation on the Root System Development, Water Uptake, and Yield

    IZUMI Yasuhiro , YOSHIDA Tomoharu , IIJIMA Morio

    … Subsoiling in the non-tilled field increased rooting depth and showed the possibility of braking yield stagnation in long-term no-tillage cultivation in wheat, but not in soybean. …

    Plant Production Science 12(3), 327-335, 2009-07-01

    J-STAGE  References (29)

  • Estimation of Vertical Water Flux through Forest Subsoil Using Buckingham-Darcy Equation  [in Japanese]

    TSURITA Tatsuya , YOSHINAGA Shuichiro , ABE Toshio

    実測した土壌の<I>K</I>-θ関係を用いたBuckingham-Darcy 式を森林斜面の上部と下部地点の下層土壌 (深さ90 cm) に適用し, 算出された鉛直下方への土壌水の年間フラックス, および降雨イベント時の土壌水のフラックスを, 対象流域の降水量や流出水量との比較によって検証した。測定された土壌水の年フラックスは上部地点が530 mm, 下部地点 …

    Journal of the Japanese Forest Society 91(3), 151-158, 2009-06-01

    J-STAGE  JASI  References (35)

  • Establishment of Zoysia pasture in abandoned agricultural lands  [in Japanese]

    大谷 一郎

    寒地型牧草の草地を暖地に造成したとき、盛夏期の高温と乾燥が牧草の生育を阻害するため、植生の悪化が早期に進行しやすい。一方、わが国には永年にわたって維持され、放牧利用されてきたシバ草地が存在する。シバは気候、土壌環境に対する適応性が広く、適切な管理を行えば永続的に植生の維持が可能である。また、傾斜地に立地し機械の導入が困難な場所でもシバを導入することで放牧利用ができる。シバ草地は、寒地型牧草地と比較 …

    Bulletin of the National Agricultural Research Center for Western Region (8), 1-44[含 英語文要旨], 2009-02

    IR  DOI  JASI 

  • Effects of Soil Type, Vertical Root Distribution and Precipitation on Grain Yield of Winter Wheat

    Itoh Hirotake , Hayashi Shigeki , Nakajima Takashi , Hayashi Tomohito , Yoshida Hozumi , Yamazaki Koou , Komatsu Teruyuki

    … Grain yield in the 2004/2005 season was not correlated with root depth index, whereas it was positively correlated in the 2005/2006 season. … The results suggest that the major factor controlling yearly changes in the difference in grain yield of winter wheat between the eastern and western areas is the difference in photosynthetic ability, which is based on rooting depth and water supply in response to solar radiation during the late growing stage. …

    Plant Production Science 12(4), 503-513, 2009

    J-STAGE 

  • Genotypic Variation in Responses of Cassava (Manihot esculenta Crantz) to Drought and Rewatering: Root System Development

    Subere Juvy Oliva Q. , Bolatete Dioscoro , Bergantin Reynaldo , Pardales Andreu , Belmonte Jedi Jim , Mariscal Algerico , Sebidos Rodrigo , Yamauchi Akira

    … Genotypic variations in rooting depth were relatively small while those in horizontal spread were apparent in the field experiment. …

    Plant Production Science 12(4), 462-474, 2009

    J-STAGE 

  • Genetic Opportunities to Improve Cereal Root Systems for Dryland Agriculture

    RICHARDS Richard A.

    … Limitations may be insufficient rooting depth, root diseases, nutrient deficiencies, toxicities and soil hardness. …

    Plant Prod. Sci. 11(1), 12-16, 2008-03-01

    References (35) Cited by (2)

  • Vegetation Morphology and Soil Features Along Unstable Road Slope : A Case Study from Mugling narayanghat Road Section, Central Nepal

    DEVKOTA Bimala Devi , OMURA Hiroshi , KUBOTA Tetsuya , PAUDEL Prem P. , HASNAWIR

    … For an individual species, we examined mean shoot height, maximum rooting depth, number of root tendrils contained, maximum diameter of a single root, root:shoot ratio, and pull out resistive force. … We classified the plants based on mean shoot height (geqq{50} cm), maximum rooting depth (geqq{20} cm), number of root tendrils (geqq{30} no.), maximum diameter of a root (geqq{7} mm), root shoot ratio (geqq{0.5}, dry), and pull out resistive force (geqq{100} N). …

    Journal of the Faculty of Agriculture, Kyushu University 53(1), 201-207, 2008-02-28

    IR 

  • Genetic Opportunities to Improve Cereal Root Systems for Dryland Agriculture

    A. Richards Richard

    … Limitations may be insufficient rooting depth, root diseases, nutrient deficiencies, toxicities and soil hardness. …

    Plant Production Science 11(1), 12-16, 2008

    J-STAGE 

  • Effects of Planting Depth on the Growth of Viviparous Seeds of Kandelia candel  [in Japanese]

    MASUDA Shinya , FUKUDA Kaori , YAGUCHI Yukio , HONMA Tamaki

    木材学会誌 53(6), 298-305, 2007-11-25

    References (23)

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