Faculty Profiles - MAEDA Morihiro

Papers - MAEDA Morihiro

Division display 61 - 80 of about 81 ／ All the affair displays >>

笠岡湾干拓地における水質汚濁の現状と安定同位体自然存在比を用いた汚濁機構解析 Reviewed

前田守弘, 浅野裕一, 兵藤不二夫, 中島泰弘, 藤原拓, 永禮英明, 赤尾聡史

土木学会論文集G（環境) 48 213 - 221 2011

Analyzing evapotranspiration components and crop coefficients for catch crop field with small area at different plant densities in a greenhouse Reviewed

Daisuke Yasutake, Chiyo Kimura, Keisuke Kondo, Kenta Inoue, Makito Mori, Shinzo Yamane, Morihiro Maeda, Hideaki Nagare, Taku Fujiwara

Environmental Control in Biology 49 ( 4 ) 217 - 225 2011

Language：English Publishing type：Research paper (scientific journal)

We cultivated dent corn as a catch crop for controlling soil salt conditions in field plots at different densities, namely, 7.3 (low), 59.7 (normal) and 119.5 (high) plants m -2 in a greenhouse, where environmental elements and plant growth were measured for analyses of evapotranspiration components relating to the catch crop effects. Using the Penman-Monteith model with specific parameters incorporated for the crop and greenhouse, leaf transpiration and soil evaporation were estimated. Further crop coefficients were analyzed by dividing actual evapotranspiration by a reference evapotranspiration determined from meteorological data. Leaf area index for the normal and high density treatments reached 14 and 22, respectively, which were extremely high values compared to those for various other crops. Transpiration and its ratio to evapotranspiration increased with plant growth and density. Crop coefficients also increased with leaf area index and transpiration, and the coefficients for the normal and high density treatments reached high values of 1.5-2 and 2-3, respectively. These findings reveal characteristic features of plant growth and water dynamics in a catch crop field. The results of this study will contribute to the optimization of catch crop cultivation and to elucidate the crop's effects on soil salt conditions in greenhouses.

DOI： 10.2525/ecb.49.217

Scopus

researchmap

重窒素標識牛ふん堆肥を施用した黒ボク土モノリスライシメータにおける２年半の窒素動態 Reviewed

井原啓貴, 前田守弘, 高橋茂, 駒田充生, 太田健

日本土壌肥料学雑誌 80 ( 5 ) 489 - 498 2010

クリーニングクロップ栽培と湛水の組み合わせによるハウス土壌集積塩類の除去特性 Reviewed

永禮英明, 井上司, 藤原拓, 赤尾聡史, 前田守弘, 山根信三

環境工学研究論文集 ( 47 ) 459 - 464 2010

トウモロコシからのリン抽出方法の検討 Reviewed

井上賢大, 藤原拓, 近藤圭介, 大年邦雄, 山根信三, 前田守弘, 永禮英明, 赤尾聡史

環境工学研究論文集 ( 47 ) 273 - 279 2010

トウモロコシからのリン抽出方法の検討

永禮英明, 井上司, 藤原拓, 赤尾聡史, 前田守弘, 山根信三

環境工学論文集 47 459 - 464 2010

クリーニングクロップ栽培と湛水の組み合わせによるハウス土壌集積塩類の除去特性

井上賢大, 近藤圭介, 藤原拓, 前田守弘, 高岡昌輝, 大年邦雄, 山根信三, 永禮英明, 赤尾聡史

環境工学論文集 47 273 - 280 2010

重窒素標識牛ふん堆肥を施用した砂丘未熟土畑モノリスライシメータにおける２年半の窒素動態 Reviewed

井原啓貴, 前田守弘, 高橋茂, 駒田充生, 太田健

日本土壌肥料学雑誌，80(5) 80 ( 5 ) 494 - 501 2009

メタン発酵消化液の施用が畑地土壌からの温室効果ガス発生と窒素溶脱に及ぼす影響 Reviewed

中村真人, 藤川智紀, 柚山義人, 前田守弘, 山岡賢

農業農村工学論文集 264 ( 77-6 ) 17 - 26 2009

Deep-soil adsorption of nitrate in a Japanese Andisol in response to different nitrogen sources Reviewed

Morihiro Maeda, Hirotaka Ihara, Takeshi Ota

SOIL SCIENCE SOCIETY OF AMERICA JOURNAL 72 ( 3 ) 702 - 710 2008.5

Language：English Publishing type：Research paper (scientific journal) Publisher：SOIL SCI SOC AMER

Nitrate adsorption in a deep Andisol with a high anion exchange capacity (AEC) needs to be studied for groundwater management. We evaluated N balances and NO(3)(-) content profiles under cropping in Andisol fields after 10 yr of repeated N additions of different N sources-swine compost (SC, N application rate of 800 kg ha(-1) yr(-1)), coated urea (CU, 400 kg ha(-1) yr(-1)), or NH(4)-N (AN, 400 kg ha(-1) y(r-1))-and an unfertilized control (NF). The N losses from the 0- to 20-cm layer of three N-treated soils during the experiment were 2300 to 2700 kg N ha(-1), which were not significantly different (P > 0.05). Nitrate-N retention in deep-soil profiles up to 450 cm was 1800 to 2300 kg N.ha(-1) irrespective of N source (P > 0.05), and was 788 kg ha(-1) in the NF treatment. On the other hand, the type of N source affected soil NO(3)(-) content profiles: NO(3)(-) from the two types of slow-release N additions (SC and CU) remained within a depth of 60 cm, whereas NO(3)(-) in the 180- to 280-cm layer was significantly higher in the AN treatment (P < 0.05). Stepwise multiple regression analysis showed that the primary contributor to soil NO(3)(-) content was Al content derived from allophane and imogolite, followed by soil pH and SO(4)(2-) with negative impacts. In Andisols of Ibaraki, Japan, NO(3)(-) leached from the root zones is retained by adsorption in deep layers, which may reduce the risk of groundwater contamination at least for 10 yr.

DOI： 10.2136/sssaj2007.0212

Web of Science

researchmap

Models to Evaluate Nitrogen Flows in Various Scale as a Pedon, Field and a Water Catchment : 2. Introduction to Simulation Models of Nitrogen Dynamics in Upland Fields Reviewed

Maeda Morihiro

Japanese Journal of Soil Science and Plant Nutrition 79 ( 1 ) 89 - 99 2008

Nitrate adsorption and retardation in an Andisols with different soil pH and different coexisting anions Reviewed

MAEDA Morihiro, TANAKA Shoichi, OTA Takeshi

Japanese Journal of Soil Science and Plant Nutrition 79 ( 4 ) 353 - 357 2008

Language：Japanese Publisher：Japanese Society of Soil Science and Plant Nutrition

The mechanisms of nitrate (NO_3^-) adsorption and retardation in Andisols are vital to understanding how NO_3^- derived from fertilizers contaminates the groundwater in areas with a volcanic ash soil. In this study, we quantified the relationship between NO_3^- adsorption and retardation in an Andisol under different conditions of pH and coexisting anions. The soil pH was adjusted to 4 or 5 by adding 0.01N HCl or H_2SO_4 solutions. We measured the NO_3^- adsorption on these pH-adjusted soils in batch tests at a soil-to-solution ratio of 1:10, and measured NO_3^- retardation by means of column-flow tests. The NO_3^- adsorption isotherms in the batch tests were described by the Freundlich equation at solution NO_3^- concentrations ranging from I to 10mmol L^<-1>. Nitrate adsorption and retardation were both smaller for H_2SO_4-treated soils than for HCl-treated soils, and decreased at higher soil pH due to the soil's low anion exchange capacity. The retardation factors determined by the column tests were strongly associated with the NO_3^- adsorption measured in the batch tests (r^2=0.99). Furthermore, we could predict the NO_3^- retardation factor from the NO_3^- adsorption in the batch tests through the adsorption-retardation theory. Our results suggest that batch tests for NO_3^- adsorption are a useful tool for inferring NO_3^- retardation in Andisols.

DOI： 10.20710/dojo.79.4_353

CiNii Article

CiNii Books

researchmap

Other Link： http://agriknowledge.affrc.go.jp/RN/2010761441

Effect of flooding activities in a greenhouse on the production and emission of nitrous oxide Reviewed

SADAMATSU Atsushi, FUJIWARA Taku, OHTOSHI Kunio, MAEDA Morihiro

Doboku Gakkai Ronbunshuu G 45 459 - 466 2008

Language：Japanese Publisher：Japan Society of Civil Engineers

The authors examined the effect of flooding activities in a greenhouse on the production and emission of nitrous oxide (N₂O) through field observations. Flooding activities affected not only the groundwater quality but also the N₂O gas flux strongly due to the infiltration of a large amount of N₂O, NO^-₃N, SO^2-₄among others, accumulated to the surface soils. Dissolved N₂O and NO^-₃-N in the groundwater decreased by denitrification in the aquifer with clay layer, and the production of N₂O as an intermediate of N₂ through denitrification is smaller than that during flooding activities. The cumulative amount of N₂O gas flux during 1 month just after flooding was estimated to account for 93% of annual flux. This result clarifies that the influence of the flooding activity on the emission of N₂O is extraordinary.

DOI： 10.11532/proes1992.45.459

CiNii Article

researchmap

Accumulation and chemical fractionation of heavy metals in andisols after a different, 6-year fertilization management Reviewed

BZ Zhao, M Maeda, JB Zhang, AN Zhu, Y Ozaki

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 13 ( 2 ) 90 - 97 2006.3

Language：English Publishing type：Research paper (scientific journal) Publisher：ECOMED PUBLISHERS

Goal, Scope and Background. Andisols are widespread in Japan and have some special properties such as high anion exchange capacity, low bulk density, and high organic matter content, which might influence the accumulation or chemical fractionation of heavy metals. However, few such data exist in Japanese andisols. The primary objective of this study was to investigate the distribution and chemical fractions of Cu, Zn, Ni, and Cr in the soil profiles and subsequently to assess their potential environmental hazard.
Materials and Methods. Soil samples were taken from a field experiment conducted on Japanese andisols, which had received either swine compost or chemical fertilizers for 6 years. Concentrations of Cu, Zn, Ni, and Cr were determined for all of the obtained extract solutions by ICP-AES.
Results and Discussion. Considerably higher total concentrations of Cu and Zn were observed in the top 20 cm layer of the compost-amended soil, relative to the unfertilized soil, while chemical fertilizers had little effect. Application of the swine compost increased the concentrations of Cu and Zn, but not Ni and Cr, in all fractions in the top 20 cm layer. The greatest increase in the organically bound fraction (OM) Cu and dilute acid-exchangeable fraction (DAEXCH) Zn was observed. This suggests that Cu and Zn are potentially bioavailable and mobile in the andisol profiles after 6-year consecutive applications of the swine compost. On the other hand, distribution of Cu, Zn, Ni and Cr among various soil fractions was generally unaffected by chemical fertilizers.
Conclusions. We observed that 6-year consecutive applications of the swine compost led to an increase in total metals of Cu and Zn, as well as their all-chemical fractions, in the top 20 cm soil layers. Potential hazard of heavy metals, especially of Cu and Zn, as a result of the use of swine compost on andisols, must be taken into account.
Recommendations and Outlook. The long-term effect of the accumulation of heavy metals, particularly Cu and Zn, in various plant tissues and soils, as well as their potential risk to surface water via runoff and groundwater via leaching, needs to be carefully considered. Further investigations in the long-term experiments are therefore necessary.

DOI： 10.1065/espr2005.06.268

Web of Science

researchmap

Environmental Conservation (Division 8 : Environment)

Kawasaki A., Maeda M., Hojito M., Inubushi K.

Japanese Journal of Soil Science and Plant Nutrition 76 792 - 797 2005

Water-use efficiency and carbon isotope discrimination in two cultivars of upland rice during different developmental stages under three water regimes Reviewed

Bingzi Zhao, Motohiko Kondo, Morihiro Maeda, Yasuo Ozaki, Jiabao Zhang

Plant and Soil 261 ( 1-2 ) 61 - 75 2004.4

Language：English Publishing type：Research paper (scientific journal)

A pot experiment was conducted in a glasshouse to clarify and quantify the effect of plant part, water regime, growth period, and cultivar on carbon isotope discrimination (CID), and to analyze the relationship between CID, stomatal behavior and water-use efficiency (WUE). The experiment was comprised of two upland rice (Oryza sativa L.) cultivars and three water regimes (100, 70, and 40% of saturation moisture) in a completely randomized design. Plants were harvested at tillering, flowering, and maturity. No significant cultivar differences in above-ground dry matter-based WUE (WUE A) and total dry matter-based WUE (WUE T) were observed. WUE A (and WUE T) increased with water stress up to tillering, but decreased with water stress after tillering. Significant cultivar differences in CID in all the analyzed plant parts were observed at all harvest times. Reduction in CID with water stress was greatest at tillering, and the effect was less pronounced at flowering and at maturity. At each harvest, the effect was most pronounced in newly developed plant parts. Root and grain tended to have the lowest CID values, and stem the highest, at all harvest times. A negative relationship was observed between CID measured at tillering and WUE A (and WUE T) measured over the period from seedling to tillering, whereas a reverse relationship was obtained between CID measured at flowering and WUE A (and WUE T) measured over the period from tillering to flowering, and an unclear relationship between CID measured at maturity and WUE A (and WUE T) measured over the period from flowering to maturity. The ratio of the intercellular and atmospheric concentration of CO 2 (C i/C a) were closely associated with CID throughout the water regimes when one cultivar was considered, however, cultivar differences in CID were not related to variations in C i/C a. The results indicate that significant cultivar difference existed in CID in all the analyzed plant parts at all harvest times, while corresponding difference in WUE A (and WUE T) between the cultivars was not necessarily consistent.

DOI： 10.1023/B:PLSO.0000035562.79099.55

Scopus

researchmap

Monitoring and Modeling Approaches for Nitrate Leaching in Upland Fields(JSSSPN Progress Awards)

Maeda M.

Japanese Journal of Soil Science and Plant Nutrition 75 ( 5 ) 571 - 572 2004

Natural 15N and 13C abundance in andisols influenced by long-term fertilization management in japan

Bingzi Zhao, Morihiro Maeda, Yasuo Ozaki

Soil Science and Plant Nutrition 48 ( 4 ) 555 - 562 2002

Language：English Publishing type：Research paper (scientific journal)

Two field experiments were conducted on Andisols in Japan to evaluate the changes in the natural 15N and 13C abundance in the soil profile and to determine whether the values of δ15N could be used as an indicator of fertilizer sources or fertilizer fate. The 6-year experiment conducted at the National Agricultural Research Center (NARC) consisted of the following treatments: application of swine compost (COMPOST), slow-release nitrogen fertilizer (SRNF), readily available nitrogen fertilizer (RANF), and absence of fertilization (CONTROL). Experimental plots located at the Nippon Agricultural Research Institute (NARI) received cattle compost at different rates for 12 years
a forest soil at this site was sampled for comparison. Swine compost application led to a considerable change in the δ15N distribution pattern in the soil profile, with the highest δ15N values recorded in the top 20 cm layers of the COMPOST plot, decreasing in the sequence of CONTROL &gt
- RANF &gt
SRNF, mainly due to the relatively high δ15N value of swine compost and its subsequent decomposition. In contrast, SRNF application resulted in the lowest δ15N values in soil, indicating the presence of negligible nitrogen losses relative to input and low nitrogen cycling rates. Values of δ15N increased with compost application rates at NARI. In the leachate collected at 1-m depth, the δ15N values decreased in the sequence of COMPOST &gt
RANF ≥ CONTROL &gt
SRNF. The δ13C values in soil peaked in the 40–60 cm layers for all the fertilizers. The δ13C value was lowest in forest soil due to the presence of plant residues in soil organic matter. These results indicated that the δ15N values in the upper soil layers or leachate may enable to detect pollution sources of organic or inorganic nitrogen qualitatively in Andisols. © 2002 Taylor &amp
Francis Group, LLC.

DOI： 10.1080/00380768.2002.10409238

Scopus

researchmap

Leaching patterns of heavy metals and nitrogen evaluated with a modified tanks-in-series model Reviewed

M Maeda, LF Bergstrom

JOURNAL OF CONTAMINANT HYDROLOGY 43 ( 2 ) 165 - 185 2000.4

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

Leaching rates of heavy metals (zinc and copper) and nitrogen were measured in 500-mm deep monolith lysimeters containing a heavy clay soil. The purpose of this study was to investigate the influence of preferential flow on leaching of these chemicals under different precipitation regimes. N was applied at a rate of 100 kg ha(-1) (50 kg NO3-N ha(-1) and 50 kg NH4-N ha(-1)), Zn, at a rate of 100 kg ha(-1), and Cu, at 40 kg ha(-1). Simultaneously, Br was applied at a rate of 100 kg ha(-1) to provide information on water movement through the profiles. A modified version of the 'tanks-in-series model' was used to describe the distribution function of non-reactive tracer (Br) travel time and compare the results with experimental data obtained in the lysimeters. Rapid discharge of Br in the monoliths was taken as a clear evidence for preferential flow. This flow behaviour was well described by the model through the parameters n and f(m), that is, in terms of the degree of mixing of water in soil and the ratio between mobile regions and the maximum amount of water in a monolith when freely drained. When determining parameter values, the required experimental period was made shorter by using a peak coordinate of distribution of non-reactive tracer travel time, instead of the moment analysis. The model could use the cumulative leachate as the only variable in the distribution function of tracer travel time under non-steady flow conditions. N leaching occurred in the form of NO3-N, which was also largely displaced through preferential flow. Zn leaching was also enhanced by preferential flow, whereas Cu leaching was negligible. Concentrations of NO3-N and Zn in leachate in the treatments, which received the element, often exceeded the Swedish drinking water guideline. The results obtained in this study show that preferential flow may have a substantial influence on leaching of heavy metals and nitrogen, and the combination of monolith lysimeters and the modified tanks-in-series model may be used to classify soils in terms of the occurrence of such flow behaviour. (C) 2000 Elsevier Science B.V. All rights reserved.

Web of Science

researchmap

Water collection efficiency of wick samplers under steady state flow conditions Reviewed

M Maeda, BC Liyanage, Y Ozaki

SOIL SCIENCE AND PLANT NUTRITION 45 ( 2 ) 485 - 492 1999.6

Language：English Publishing type：Research paper (scientific journal) Publisher：JAPANESE SOC SOIL SCIENCE PLANT NUTRITION

Wick samplers could be used for measurements of solute transport, Water collection efficiency of wick samplers, defined as the volume of water collected by a sampler divided by the water flux from the root zone, should be close to 100%, We used three wick samplers differing in wall height in Hydric Hapludands under constant rainfall intensity and examined the effects of the rainfall intensity and wall height on the water collection efficiency based on experimental data and a numerical analysis. The water collection efficiency of wick samplers increased with the rainfall intensity and wall height because the increase in both rainfall intensity and wall height resulted in a distribution of the total potential inside the wick sampler close to that outside the wick sampler. Furthermore, the ratio of the cross-sectional area of the drain hole to that of the cylinder must be taken into account in the design of a wick sampler.

Web of Science

researchmap

　 PREV - NEXT 　

< MAEDA Morihiro >

Papers - MAEDA Morihiro