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Nagano, Hirohiko; Nakayama, Masataka*; Katata, Genki*; Fukushima, Keitaro*; Yamaguchi, Takashi*; Watanabe, Makoto*; Kondo, Toshiaki*; Atarashi-Andoh, Mariko; Kubota, Tomohiro*; Tateno, Ryunosuke*; et al.
Soil Science and Plant Nutrition, 67(5), p.606 - 616, 2021/10
Times Cited Count:2 Percentile:13.56(Plant Sciences)We analyzed the relationships between nitrogen deposition (deposition of nitrate and ammonium ions) and soil microbial properties in a cool temperate forest surrounded by normally fertilized pasture grasslands in northern Japan. The aim of the present study was to gain the primary information on soil microbial response to moderately elevated nitrogen deposition ( 10 kg N ha
y
). We established three experimental plots in the forest edge adjacent to grasslands and other three plots in the forest interior at least 700 m away from the grasslands. During May to November 2018, nitrogen deposition in each plot was measured. In August 2018, litter and soil (0-5 cm depth) samples were collected from all plots to measure net nitrogen mineralization and nitrification rates as indicators of microbial activity, and microbial biomass carbon and nitrogen and various gene abundances (i.e. bacterial 16S rRNA, fungal ITS, bacterial amoA, and archaeal amoA genes) as indicators of microbial abundance and structure. Nitrogen deposition in the forest edge was 1.4-fold greater than that in the forest interior, even while the maximum deposition was 3.7 kg N ha
. Nitrogen deposition was significantly correlated to the net nitrogen mineralization and nitrification rates and the 16S rRNA and bacterial amoA gene abundances. Microbial community structures were different between litter and soil samples but were similar between the forest edge and interior. Significant correlations of nitrogen deposition to the soil carbon to nitrogen ratio, and the nitrate and ammonium contents were also observed. Thus, our results show that moderately elevated nitrogen deposition in nitrogen-limited forest edges can stimulate microbial activities and abundances in soils.
Miyoshi, Yuta*; Hidaka, Kota*; Yin, Y.-G.*; Suzui, Nobuo*; Kurita, Keisuke; Kawachi, Naoki*
Frontiers in Plant Science (Internet), 12, p.688887_1 - 688887_14, 2021/07
Times Cited Count:15 Percentile:75.94(Plant Sciences)In this study, C-photosynthate translocation into strawberry fruits in individual plants was visualized non-invasively and repeatedly using a positron emission tracer imaging system (PETIS) to assess the spatiotemporal variability in the translocation dynamics in response to increasing daylight integrals. This is the first study to use
C-radioisotopes to clarify the spatiotemporal variability in photosynthate translocation from source leaves to individual sink fruits in vivo in response to increasing daylight integrals at a high spatiotemporal resolution.
Nagano, Hirohiko; Atarashi-Andoh, Mariko; Koarashi, Jun
Soil Science and Plant Nutrition, 65(5), p.525 - 533, 2019/10
Times Cited Count:4 Percentile:14.74(Plant Sciences)In the present study, two volcanic ash soils (soil A and B) from a temperate broad-leaved forest in eastern Japan were incubated under repeated dry-wet cycles and continuously constant moisture conditions. The primary aims were to quantify the potential for enhancement of carbon dioxide (CO) release owing to increased water fluctuation and to examine differences in the responses of volcanic ash soils with different physicochemical properties. Soil B, rather than soil A, was a typical Andosol. During incubation at 20
C for 120 days with five dry-wet cycles, the CO
release rate was measured periodically. Abundance of the stable carbon isotope in CO
(
C-CO
) was measured to capture changes in the origin of decomposed soil organic matter (SOM) owing to the dry-wet cycles. The CO
release rate under the dry-wet cycles was up to 49% higher than the values predicted from a parabolic relationship between CO
release and water content during incubation under the continuously constant moisture condition. The magnitude of CO
release enhancement was 2.7-fold higher in soil B relative to that in soil A. The
C-CO
value in the dry-wet cycles was enriched by 0.3-2.3%
compared to that during incubation under the continuously constant moisture conditions, suggesting that the decomposition of old and/or well-metabolized SOM was enhanced by the dry-wet cycles. Thus, the present study suggests that Andosols, which have been believed to have a strong SOM stabilization ability, are vulnerable to dry-wet cycles. Then, increased water fluctuation in a future warmer world would have significant potential to stimulate CO
release from soils.
Nagano, Hirohiko; Kim, Y.*; Lee, B.-Y.*; Shigeta, Haruka*; Inubushi, Kazuyuki*
Soil Science and Plant Nutrition, 64(6), p.793 - 802, 2018/12
Times Cited Count:5 Percentile:23.80(Plant Sciences)In this study, we conducted an incubation experiment on a frozen soil core collected from a black spruce forest in Interior Alaska, in order to investigate potential changes in greenhouse gaseous (GHG) and microbial dynamics during thawing of frozen soil. The soil thawing is an important environmental process determining the annual GHG balance in the northern high-latitude ecosystem. A core spanning the ground surface to upper permafrost with a depth of 90 cm was vertically grouped into three layers (top, middle, and bottom layers). Then, 12 soil samples from 3 layers (i.e., 4 soil samples per layer) were incubated for 3 weeks, and net carbon dioxide (Co) and methane (CH
) release/uptake rates were estimated. During the incubation, temperature was changed weekly from 0 to 5, then 10
C. The net amounts of CO
released by six of the eight soil samples from the top and middle layers were 1.5 to 19.2-fold greater at 5
C than at 0
C, while the release at 10
C was reduced in the cases of three of these six soil samples. Net CH
release was the greatest in bottom-layer soil samples incubated at 0
C. Then, low but apparent CH
release was observed in top and middle-layer soil samples incubated at 0
C. At 5 and 10
C, net CH
release from bottom-layer soil samples was decreased. Then, net CH
uptake was observed in the top and the middle-layer soil samples. Both net uptake and release of CH
were reduced upon the addition of a chemical inhibitor (i.e., 2-bromoethane sulfonate) of anaerobic methanotrophic and methanogenic activity. The bacterial and archaeal community structures based on 16S rRNA amplicon analysis were changed along the depth, while they were less changed during thawing. Thus, it was found that soil GHG dynamics responded sensitively and variously to thawing, while there was less change in 16S rRNA-based microbial community structures during the thawing prog
Balestrazzi, A.*; Achary V Mohan Murali*; Macovei, A.*; Yoshiyama, Kaoru*; Sakamoto, Ayako
Frontiers in Plant Science (Internet), 7, p.64_1 - 64_2, 2016/02
Times Cited Count:4 Percentile:61.85(Plant Sciences)no abstracts in English
Higuchi, Kyoko*; Kanai, Masatake*; Tsuchiya, Masahisa*; Ishii, Haruka*; Shibuya, Naofumi*; Fujita, Naoko*; Nakamura, Yasunori*; Suzui, Nobuo; Fujimaki, Shu; Miwa, Eitaro*
Frontiers in Plant Science (Internet), 6, p.138_1 - 138_6, 2015/03
Times Cited Count:22 Percentile:60.08(Plant Sciences)Hung, N. V. P.*; Watanabe, Shiori*; Ishikawa, Shinji*; Otake, Norikuni*; Sueyoshi, Kuni*; Sato, Takashi*; Ishii, Satomi; Fujimaki, Shu; Oyama, Takuji*
Soil Science and Plant Nutrition, 59(6), p.888 - 895, 2013/12
Times Cited Count:5 Percentile:16.43(Plant Sciences)Sasaki, Kota*; Liu, L.*; Yusa, Noritaka*; Wakai, Takashi; Hashizume, Hidetoshi*
Proceedings of 1st International Conference on Maintenance Science and Technology for Nuclear Power Plants (ICMST-Tokyo 2012) (CD-ROM), 2 Pages, 2012/11
Biswas, K.; Mori, Takeshi*; Kogawara, Satoshi*; Hase, Yoshihiro; Narumi, Issei; Ono, Yutaka
American Journal of Plant Sciences, 3(9), p.1181 - 1186, 2012/09
Yoneyama, Tadakatsu*; Suzui, Nobuo; Ishioka, Noriko; Fujimaki, Shu
Soil Science and Plant Nutrition, 57(2), p.279 - 282, 2011/05
Times Cited Count:4 Percentile:13.58(Plant Sciences)Ishii, Satomi; Suzui, Nobuo; Ito, Sayuri; Ishioka, Noriko; Kawachi, Naoki; Otake, Norikuni*; Oyama, Takuji*; Fujimaki, Shu
Soil Science and Plant Nutrition, 55(5), p.660 - 666, 2009/10
Times Cited Count:15 Percentile:39.71(Plant Sciences)Kadono, Atsunobu; Funakawa, Shinya*; Kosaki, Takashi*
Soil Science and Plant Nutrition, 55(2), p.243 - 251, 2009/04
Times Cited Count:12 Percentile:33.52(Plant Sciences)To understand the dynamics of soil organic matter (SOM) in humid Asia, several properties were tested to estimate the amounts of potentially mineralizable carbon (PMC) and nitrogen (PMN) as well as recalcitrant carbon (ROC) and nitrogen (RON). Eighty-nine surface soil samples were collected in Thailand, Indonesia and Japan from cropland and forest ecosystems. The fresh soils were incubated under constant conditions, and the CO and the mineral N from the soils were monitored. PMC and PMN were determined by fitting models to the cumulative curves of the emitted C and N. ROC and RON were determined by the subtraction of PMC and PMN from TC and TN, respectively. Using multiple regression analysis with the stepwise method, PMC and PMN was well estimated by carbon and nitrogen content of light fraction (LFC and LFN) and clay content, while ROC and RON were estimated by LF-OM, amorphous materials and clay content, suggesting the importance of parent materials in this region.
Suwa, Ryuichi*; Fujimaki, Shu; Suzui, Nobuo; Kawachi, Naoki; Ishii, Satomi; Sakamoto, Koichi*; Nguyen, N. T.*; Saneoka, Hirofumi*; Mohapatra, P. K.*; Moghaieb, R. E.*; et al.
Plant Science, 175(3), p.210 - 216, 2008/09
Times Cited Count:20 Percentile:47.41(Biochemistry & Molecular Biology)Kawachi, Naoki; Fujimaki, Shu; Sakamoto, Koichi*; Ishioka, Noriko; Matsuhashi, Shimpei; Sekimoto, Hitoshi*
Soil Science and Plant Nutrition, 54(3), p.408 - 416, 2008/06
Times Cited Count:11 Percentile:31.36(Plant Sciences)The root parasitic plants spp. (broomrapes) seriously affect agricultural production. A visualization and quantitative analytical method for the interception of nutrients was established using a positron-emitting tracer imaging system and
NO
. By using this analytical method that involves volume normalization with
F
images, the nitrogen nutrient interception ratio of the
spp. was calculated as 73.6
3.9% in a host-parasite system of red clover (
L.).
Tsukamoto, Takashi*; Nakanishi, Hiromi*; Kiyomiya, Shoichiro*; Watanabe, Satoshi; Matsuhashi, Shimpei; Nishizawa, Naoko*; Mori, Satoshi*
Soil Science and Plant Nutrition, 52(6), p.717 - 725, 2006/12
Times Cited Count:36 Percentile:62.66(Plant Sciences)Matsuhashi, Shimpei; Fujimaki, Shu; Kawachi, Naoki; Sakamoto, Koichi; Ishioka, Noriko; Kume, Tamikazu
Soil Science and Plant Nutrition, 51(3), p.417 - 423, 2005/06
Times Cited Count:25 Percentile:52.38(Plant Sciences)no abstracts in English
Mori, Satoshi*; Kiyomiya, Shoichiro*; Nakanishi, Hiromi*; Ishioka, Noriko; Watanabe, Satoshi; Osa, Akihiko; Matsuhashi, Shimpei; Hashimoto, Shoji; Sekine, Toshiaki; Uchida, Hiroshi*; et al.
Soil Science and Plant Nutrition, 46(4), p.975 - 979, 2000/12
Times Cited Count:31 Percentile:58.93(Plant Sciences)no abstracts in English
; ;
Soil Science and Plant Nutrition, 30(2), p.125 - 136, 1984/00
Times Cited Count:37 Percentile:84.92(Plant Sciences)no abstracts in English
; ;
Soil Science and Plant Nutrition, 29(4), p.489 - 497, 1983/00
Times Cited Count:13 Percentile:61.54(Plant Sciences)no abstracts in English
; Ko-Ling Yen*
Soil Science and Plant Nutrition, 18(5), p.173 - 178, 1972/00
no abstracts in English