Search Results 1-20 of 981

  • Effects of winter flooding on the soil nitrogen fractions and organic rice growth in a paddy field with low nitrogen fertility  [in Japanese]

    Oomori Takanori , Yokota Satoko , Takechi Kazuhiko

    <p>冬期湛水田の高い生産力の要因を明らかにするため,2013~2015年に有機栽培を行っている冬期湛水田と冬期乾田のそれぞれに無施肥区と菜種油粕を施用した標準施肥区を設け,水稲の栽培試験を行うとともに,層位別に採取した土壌の形態別窒素濃度を定量した.冬期湛水により,わら重,籾重,精玄米重並びに穂数,一穂籾数,m<sup>2</sup>あたり籾数が有意に増加し, …

    Japanese Journal of Soil Science and Plant Nutrition 91(2), 67-74, 2020

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  • Properties of Rice Growth Cultivated on Paddy Fields Damaged by the 2016 Kumamoto Earthquake  [in Japanese]

    脇山 恭行 , 榮 誠三郎 , 田中 誠司 , 柴田 昇平 , 野見山 綾介

    平成 28 年熊本地震により,震源地や断層周辺の水田では亀裂が入ったり,水田表面が凹凸となる不陸が生じたりするなどの被害が発生した。熊本市東区秋津地区及び益城町の不陸が発生した水田で栽培された水稲の株当たり生育量は,凹部が凸部に比べて大きかった。その結果,秋津地区の水田では,水稲の収量は凹部で高かった。しかし,益城町の一部の水田では凹部で欠株が多く,収量は低かった。欠株の原因は,移植直後,水深が深 …

    九州沖縄農業研究センター研究資料 = Memoirs of the Kyushu Okinawa Agricultural Research Center (95), 49-66, 2019-03-20

    IR  DOI 

  • Effects of Floating Ball on the Growth of Lotus (<i>Nelumbo nucifera</i>) and Yield of Lotus Root on Shallow Soil Cultivation System  [in Japanese]

    Mizobuchi Saori , Toma Yo , Ueno Hideto

    <p>本研究では,レンコン浅床栽培における田面へのボール浮揚がハスの生育や肥大根茎(レンコン)の収量に与える影響を評価した.直径80 mmのポリエステル製白色ボールを田面に浮かべ,2018年4月から9月にかけてハスを栽培した.ボール浮揚により,ボールの保温効果と田面水の蒸発量抑制による顕熱の増加に起因して地温上昇が生じ,ハスの生育が促進された.さらに,地温上昇は地下茎の分岐を促進したと …

    Japanese Journal of Farm Work Research 54(3), 143-149, 2019

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  • Spatial assessment of leaf nitrogen content in a natural cool-temperate mixed forest using unmanned aerial vehicle derived 3D data  [in Japanese]

    Inoue Kao , Shibata Hideaki , Yoshida Toshiya , Nakaji Tatsuro , Obanawa Hiroyuki , Kato Akira

    <p>森林生態系における窒素循環の空間分布を理解するためには,葉の窒素含有量の空間分布を把握することが重要である。本研究では,デジタルカメラを搭載した小型無人航空機(UAV)を用いて高解像度の空中写真を異なる季節で撮影し,そのRGB指標値と連続写真から三次元データを作成するStructure from Motion(SfM)を併用することで,樹種構成や林冠構造が不均質な森林における上層 …

    Japanese Journal of Forest Environment 61(1), 1-13, 2019

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  • Drainage effects on leaf traits of trees in tropical peat swamp forests in Central Kalimantan, Indonesia

    Ichie Tomoaki , Yoneyama Aogu , Hashimoto Taro , Tanaka-Oda Ayumi , Kusin Kitso , Kenzo Tanaka

    … The leaf traits of these trees in particular may have been directly or indirectly affected by drainage because of their high sensitivity to environmental change. … To understand the influence of drainage on leaf traits, we investigated leaf morphological and physiological differences between intact and drained peat swamp forests in Palangka Raya, Indonesia, using 14 species distributed over both types of forests. …

    Tropics 28(1), 1-11, 2019

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  • Applications of Electrostatic Effects in Agriculture and Food Processing  [in Japanese]

    TAKAKI Koichi

    … Other types of pulsed power that have biological effects can be caused using gas and water discharges that include reactive species such as reactive oxygen species (ROS) and reactive nitrogen species (RNS). … The growth rate of the vegetables and the sugar content in strawberries harvested after cultivation increased due to the plasma irradiation of the hydroponic solution. … The leaf sizes of the plants increased with the plasma treatment time. …

    Journal of Printing Science and Technology 56(2), 70-75, 2019

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  • Effects of hardwood recruitment on leaf nitrogen content of plants in a conifer plantation  [in Japanese]

    Masuda Chie , Negishi Yuki , Suzuki Masanori , Seiwa Kenji

    <p>森林において生物多様性の向上とともに生産力が向上することが示唆されている(Liang et al. 2016)。本研究では、間伐強度(無間伐、33%間伐、67%間伐)によって、種多様性の回復程度が異なるスギ人工林において、種多様性が物質生産に及ぼす影響を窒素分配から解明を試みる。67%間伐区では、33%間伐区と比べて広葉樹の個体数が増加した。さらに土壌間隙水中の硝酸態窒素量が減少 …

    The Japanese Forest Society Congress 130(0), 265, 2019

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  • Influence of leaf litter traits and environmental factors on the decomposition process in the Chichibu Mountains  [in Japanese]

    Tanuma Miyuki , Umeki Kiyoshi , Hirao Toshihide

    <p>森林土壌における落葉分解は、森林が生態系機能を発揮する上での基本的なプロセスの1つである。本研究では、奥秩父山地の標高の異なる天然林において、落葉形質や環境要因が落葉分解速度にどのような影響を与えるかを検討した。落葉0.5gを入れたリターバッグを8樹種それぞれについて90個作成し、各樹種1つずつのリターバック8個を1セットとした。調査地6地点に埋設箇所を5ヶ所ずつ設け、それぞれの …

    The Japanese Forest Society Congress 130(0), 141, 2019

    J-STAGE 

  • Monthly variability in the photosynthetic capacities, leaf mass per area and leaf nitrogen contents of rice (<I>Oryza sativa</I> L.) plants and their correlations

    TATSUMI Kenichi , KUWABARA Yoshiki , MOTOBAYASHI Takashi

    … The monthly variability in the photosynthetic capacities, leaf mass per area (LMA) and leaf nitrogen (N) contents of rice (<I>Oryza sativa</I> …

    Journal of Agricultural Meteorology 75(2), 111-119, 2019

    J-STAGE 

  • Effect of leaf nitrogen content on refixation of photorespired CO<sub>2</sub> in C<sub>3</sub> plants  [in Japanese]

    Nakanishi Ai , Kubota Hikaru , Ookawa Taiichiro , Hirasawa Tadashi , Adachi Shunsuke , Sage Rowan F

    Abstracts of Meeting of the CSSJ 247(0), 62, 2019

    J-STAGE 

  • Relationship between leaf flushing phenology and defensive traits of canopy trees of five dipterocarp species in a tropical rain forest

    Yoneyama Aogu , Ichie Tomoaki

    … between leaf flushing phenology, defensive and photosynthetic traits, such as leaf flushing frequency, the number of emerging leaves per flushing term, the leaf life span, total phenolic and condensed tannin contents, leaf toughness, leaf nitrogen content, the photosynthetic rate at light saturation (<i>P</i><sub>max</sub>) and leaf mass per …

    Tropics 27(4), 67-79, 2019

    J-STAGE 

  • Passion Fruit Quality under Acidic Soil Conditions

    Niwayama Shota , Higuchi Hirokazu

    … Vegetative growth, physiological responses, and leaf mineral contents were also measured. … As indicators of taste, the titratable acid content was lower and total soluble solid content was higher at pH 4.5 and 5.5, indicating preferable palatability. … Vegetative growth was inhibited, and the photosynthetic rate and leaf water potential were lowest at pH 6.5. … The leaf/fruit ratio was lower at pH 6.5. …

    The Horticulture Journal 88(1), 50-56, 2019

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  • Effect of Topdressing at Panicle by Pouring Nitrogen Fertilizer Application on Growth, Yield of Rice and Labor Cost of Fertilization in Large–Scale Paddy Feild

    PATHIRANA U. A. Prabath , MATSUE Yuji , NANSEKI Teruaki , YOKOTA Shuichi , CHOMEI Yosuke

    … This study was conducted to investigate the efficiency of pouring nitrogen (N) fertilizer application (PA) method at panicle formation stage and its effects on growth, yield of rice and labor cost of fertilization in large–scale paddy field in Japan. … Higher SPAD value and leaf N content were responsible for the higher grain yield under PA method. …

    九州大学大学院農学研究院紀要 63(2), 487-494, 2018-09-01

    IR 

  • Effect of Swine Compost Application and the Nitrogen Application Method on Grain Yield and Protein Content in Brown Rice of the High-Yielding Rice Cultivar'Iwaidawara'in the Tohoku Region  [in Japanese]

    大平 陽一 , 西田 瑞彦 , 福重 直輝 , 持田 秀之 , 石川 洋 , 勝部 忠志 , 斎藤 真二 , 菊池 公一 , 小野 洋 , 白土 宏之 , 伊藤 景子

    … In order to fully demonstrate the potential of "Iwaidawara" when utilizing swine compost in cooperation with livestock farmers, we examined the fertilizing effect of swine compost and the nitrogen fertilizer application method, which effectively provides high yield and protein content of rice grain. …

    農研機構研究報告 東北農業研究センター = Bulletin of the NARO, Agricultural Research for Tohoku Region (120), 47-66, 2018-03

    IR  DOI 

  • Effect of Biochar Derived from Coffee Sludge on Growth of Chinese Cabbage (Brassica campestris L. ssp. pekinensis) in Field Soil and Bed Soil

    SONG Hyeon–Ji , LEE Jae–Han , KIM Su-Hun , LEE Ho–Cheol , SHINOGI Yoshiyuki , OH Taek–Keun

    … In field soil, the Chinese cabbage with 5% treatment of coffee sludge biochar had the highest fresh weight (116.46 ± 1.3 g/plant) and as the content of biochar increased, the number of leaves that appeared also increased. … Compared to the control, biochar treatments resulted in increased number of leaves, leaf length, and leaf width. …

    九州大学大学院農学研究院紀要 63(1), 131-137, 2018-02-27

    IR 

  • Correlation between the Ratio of Transmitted Near Infrared Radiation to Photosynthetically Active Radiation and Rice Growth Indicators  [in Japanese]

    HIRAI Yasumaru , MOE Kyi , NAGAMATSU Akina , YAMAKAWA Takeo , INOUE Eiji , OKAYASU Takashi , MITSUOKA Muneshi

    <p>水稲の生育診断を生産現場で実施するに当たって、生育指標の簡易・省力的な計測が欠かせない。本研究では、水稲群落下で計測した700-1000 nmの波長帯(NIR)と400-700 nmの波長帯(PAR)の透過光の比NIRt/PARt(添え字のtはtransmittedの略)に着目した。NIRt/PARtを用いた水稲の生育指標推定の可能性を検討するために、葉身窒素含量(LNC)、稲体 …

    Journal of the Japanese Agricultural Systems Society 34(3), 59-66, 2018

    J-STAGE 

  • Effects of Foliar Spraying of Urea on Grain Protein Content and Nitrogen Accumulation in Plant Organs in Bread Wheat Cultivar "Setokirara"  [in Japanese]

    Inaba Shunji , Takahashi Tadashi , Kamada Eiichiro , Murata Motoharu , Ikejiri Akihiko , Uchiyama Aki , Kaneko Kazuhiko , Araki Hideki , Tanno Ken-Ichi

    <p>「せときらら」はパン用のコムギ品種であるが,多収を示すものの子実タンパク質含有率が低くなり易いことが問題となっている.本研究では,開花後に窒素を追肥し,子実タンパク質含有率に及ぼす影響を明らかにするとともに,その時の植物体内での窒素蓄積動向を明らかにした.窒素追肥処理では開花期に硫安を土壌表面に散布する区とともに,同じく尿素を葉面に散布する区を設けた.さらに,尿素を葉面に散布する …

    Japanese Journal of Crop Science 87(4), 291-297, 2018

    J-STAGE  JASI 

  • Multiple Evaluations of Use of Digested Slurry from Methane Fermentation of Household Food Waste in Vegetable Growing in Ho Chi Minh City, Vietnam

    ORITATE Fumiko , CUC Tran Thi Kim , USHIDA Masaya , MURAKAMI-SUZUKI Rie , NAKAMURA Masato , YAMAOKA Masaru

    … The digested slurry had a lower ammonia nitrogen content and a smaller ratio of ammonia to total nitrogen than those in previous studies of digested slurries from food waste in other countries. … It also had a low harmful contaminant content. …

    Japan Agricultural Research Quarterly: JARQ 52(4), 325-337, 2018

    J-STAGE 

  • Leaf- and ecosystem-scale photosynthetic parameters for the overstory and understory of boreal forests in interior Alaska

    UEYAMA Masahito , TAHARA Narumi , NAGANO Hirohiko , MAKITA Naoki , IWATA Hiroki , HARAZONO Yoshinobu

    … In northern high-latitude regions where cold temperatures limit available nitrogen for plants, the photosynthetic parameters are tightly linked with the nitrogen content. …

    Journal of Agricultural Meteorology 74(2), 79-86, 2018

    J-STAGE 

  • Physiological Analysis of Leaf Photosynthesis of Backcross-Derived Progenies from Soybean and <I>Glycine tomentella </I>Hayata  [in Japanese]

    Shamim Mohammad Jan , Tanaka Yu , Sakoda Kazuma , Shiraiwa Tatsuhiko , Nelson Randall L.

    Abstracts of Meeting of the CSSJ 245(0), 48, 2018

    J-STAGE 

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