Sugimoto Yoshitaka, Komai Yukio, Kunimatsu Takao, N. Osamu
The storm-runoff loads of nitrogen and phosphorus were observed during seven events in the two experimental small paddy-fields watersheds, the wheat watershed (7.44 ha) and the rice watershed (6.96 ha). The drainage concentrations of total nitrogen (TN) were ranged from 2.70 to 9.86 mg l -1 in the wheat watershed and from 1.56 to 2.18 mg l -1 in the rice watershed. Those of total phosphorus (TP) were ranged from 0.104 to 0.780 mg l -1 and from 0.164 to 0.338 mg l -1 , respectively. In the first storm event after the plowing and basal fertilizer, TN and TP concentration of the wheat watershed was the highest in all events. In this event, the TN and TP concentration of the wheat watershed was 5.3 and 2.5 times higher and storm-runoff load was 4.1 and 1.9 times larger than the same event of the rice watershed, respectively. In this event, nitrate nitrogen (NO 3 -N) and particulate phosphorus (PP) occupied 75% of TN and 47% and TP of the wheat watershed, respectively. As a result, it suggests that the wheat cropping in rice-paddy fields increases the runoff-load of TN and NO 3 -N.
在小麦小流域(7.44 ha)和水稻小流域(6.96 ha)两个试验小稻田小流域进行了7次暴雨径流氮磷负荷观测。小麦流域总氮(TN)排水量为2.70 ~ 9.86 mg l -1，水稻流域为1.56 ~ 2.18 mg l -1。总磷(TP)为0.104 ~ 0.780 mg l -1, 0.164 ~ 0.338 mg l -1。在耕后施基肥第一次暴雨事件中，小麦流域全氮和全磷浓度在所有事件中最高。在该事件中，小麦流域的全氮和全磷浓度分别是水稻流域的5.3倍和2.5倍，暴雨径流负荷分别是水稻流域的4.1倍和1.9倍。在此情况下，硝态氮(no3 -N)和颗粒磷(PP)分别占小麦流域总氮的75%和总磷的47%。综上所述，稻田种植小麦增加了全氮和no3 -N的径流负荷。
{"title":"Change of storm-runoff load caused by wheat cropping in paddy fields","authors":"Sugimoto Yoshitaka, Komai Yukio, Kunimatsu Takao, N. Osamu","doi":"10.11190/JER.15.129","DOIUrl":"https://doi.org/10.11190/JER.15.129","url":null,"abstract":"The storm-runoff loads of nitrogen and phosphorus were observed during seven events in the two experimental small paddy-fields watersheds, the wheat watershed (7.44 ha) and the rice watershed (6.96 ha). The drainage concentrations of total nitrogen (TN) were ranged from 2.70 to 9.86 mg l -1 in the wheat watershed and from 1.56 to 2.18 mg l -1 in the rice watershed. Those of total phosphorus (TP) were ranged from 0.104 to 0.780 mg l -1 and from 0.164 to 0.338 mg l -1 , respectively. In the first storm event after the plowing and basal fertilizer, TN and TP concentration of the wheat watershed was the highest in all events. In this event, the TN and TP concentration of the wheat watershed was 5.3 and 2.5 times higher and storm-runoff load was 4.1 and 1.9 times larger than the same event of the rice watershed, respectively. In this event, nitrate nitrogen (NO 3 -N) and particulate phosphorus (PP) occupied 75% of TN and 47% and TP of the wheat watershed, respectively. As a result, it suggests that the wheat cropping in rice-paddy fields increases the runoff-load of TN and NO 3 -N.","PeriodicalId":15612,"journal":{"name":"Journal of ecotechnology research","volume":"1 1","pages":"129-134"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79037121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mingyuan Du, Chen Hongwu, Lei Jiaqiang, Xu Xinwen, Li Shengyu, H. Qing
{"title":"Changes in atmospheric environmental conditions following the greening (tree planting) in the central part of the Taklimakan Desert","authors":"Mingyuan Du, Chen Hongwu, Lei Jiaqiang, Xu Xinwen, Li Shengyu, H. Qing","doi":"10.11190/JER.16.19","DOIUrl":"https://doi.org/10.11190/JER.16.19","url":null,"abstract":"","PeriodicalId":15612,"journal":{"name":"Journal of ecotechnology research","volume":"77 1","pages":"19-22"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85738314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
*Department of Environment and Life Engineering, Toyohashi University of Technology, Toyohashi, Aichi, 441-8580 Japan **Department of Agroindustrial Technology, The University of Lampung, Bandar Lampung, Lampung, 35145 Indonesia ***International Cooperation Center for Engineering Education Development, Toyohashi University of Technology, Toyohashi, Aichi, 441-8580 Japan ****Graduate School of Environment and Information Sciences, Yokohama National University, Yokohama, Kanagawa, 240-8501 Japan *****Department of Ecological Engineering, Toyohashi University of Technology, Toyohashi, Aichi, 441-8580 Japan
{"title":"Methane Emission from Anaerobic Pond of Tapioca Starch Extraction Wastewater in Indonesia","authors":"Kamahara Hirotsugu, Hasanudin Udin, Atsuta Yoichi, Widiyanto Anugerah, Tachibana Ryuichi, Goto Naohiro, Daimon Hiroyuki, F. Koichi","doi":"10.11190/JER.15.79","DOIUrl":"https://doi.org/10.11190/JER.15.79","url":null,"abstract":"*Department of Environment and Life Engineering, Toyohashi University of Technology, Toyohashi, Aichi, 441-8580 Japan **Department of Agroindustrial Technology, The University of Lampung, Bandar Lampung, Lampung, 35145 Indonesia ***International Cooperation Center for Engineering Education Development, Toyohashi University of Technology, Toyohashi, Aichi, 441-8580 Japan ****Graduate School of Environment and Information Sciences, Yokohama National University, Yokohama, Kanagawa, 240-8501 Japan *****Department of Ecological Engineering, Toyohashi University of Technology, Toyohashi, Aichi, 441-8580 Japan","PeriodicalId":15612,"journal":{"name":"Journal of ecotechnology research","volume":"18 1","pages":"79-83"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87442065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Size-separated aerosol number concentrations and sulfate aerosols as well as rain water chemistry were simultaneously measured at Bijodaira (altitude, 977m), western slope of Mt. Tateyama, near the coast of the Japan Sea, during the autumn in 2007. The number concentrations of particles were usually higher in the daytime than in the nighttime. The sulfate particles were well correlated with the number concentrations of the fine particles. High concentrations of sulfate and the fine particles were sometimes detected. The high sulfate aerosols might have been transported from the polluted regions in the Asian continent. The trans-boundary pollutants highly affected the chemical characteristics of bulk samples rain water.
{"title":"Measurements of Aerosol Number Concentrations, Sulfate Aerosols and Rain water Chemistry at Bijodaira, western slope of Mt. Tateyama, Japan","authors":"Watanabe Koichi, Honoki Hideharu, Naruse Isao, Endo Fuminori, Murakami Takashi, Yoshida Yuki","doi":"10.11190/JER.15.49","DOIUrl":"https://doi.org/10.11190/JER.15.49","url":null,"abstract":"Size-separated aerosol number concentrations and sulfate aerosols as well as rain water chemistry were simultaneously measured at Bijodaira (altitude, 977m), western slope of Mt. Tateyama, near the coast of the Japan Sea, during the autumn in 2007. The number concentrations of particles were usually higher in the daytime than in the nighttime. The sulfate particles were well correlated with the number concentrations of the fine particles. High concentrations of sulfate and the fine particles were sometimes detected. The high sulfate aerosols might have been transported from the polluted regions in the Asian continent. The trans-boundary pollutants highly affected the chemical characteristics of bulk samples rain water.","PeriodicalId":15612,"journal":{"name":"Journal of ecotechnology research","volume":"1 1","pages":"49-52"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79798338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"PCR-DGGE analysis of Asian dust (KOSA) bioaerosol recorded in snow cover at Mount Tateyama, Central Japan","authors":"Maki Teruya, Aoki Kazuma, Susuki Shinji, Kobayashi Fumihisa, Kakikawa Makiko, Tobo Yutaka, M. Atsushi, Hasegawa Hiroshi, Iwasaka Yasunobu","doi":"10.11190/JER.15.97","DOIUrl":"https://doi.org/10.11190/JER.15.97","url":null,"abstract":"","PeriodicalId":15612,"journal":{"name":"Journal of ecotechnology research","volume":"363 1","pages":"97-101"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73415341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
*Department of Chemical and Biological Engineering, Ube National College of Technology, 2-14-1 Tokiwadai, Ube, 755-8555 Japan. **Department of Envioronmental Science and Engineering, Faculty of Engineering, Yamagchi University, 2-16-1 Tokiwadai, Ube, 755-8611 Japan. ***National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi,Tsukuba, 305-8565 Japan. ****Department of Chemical Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Nishi-Ku, Fukuoka, 819-0395 Japan.
{"title":"Prediction of Adsorption Equilibria for Multi-Solute Dilute Aqueous Solutions on Activated Carbon Using the Extended Radke-Prausnitz Equation","authors":"Fukuchi Kenji, Kobuchi Shigetoshi, Furuya Takeshi, Arai Yasuhiko","doi":"10.11190/JER.15.63","DOIUrl":"https://doi.org/10.11190/JER.15.63","url":null,"abstract":"*Department of Chemical and Biological Engineering, Ube National College of Technology, 2-14-1 Tokiwadai, Ube, 755-8555 Japan. **Department of Envioronmental Science and Engineering, Faculty of Engineering, Yamagchi University, 2-16-1 Tokiwadai, Ube, 755-8611 Japan. ***National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi,Tsukuba, 305-8565 Japan. ****Department of Chemical Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Nishi-Ku, Fukuoka, 819-0395 Japan.","PeriodicalId":15612,"journal":{"name":"Journal of ecotechnology research","volume":"25 1","pages":"63-66"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82140194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Development of Estimation Model for Nutrient Budgets in Inohana Lake Estuary","authors":"Yuk Jin-Hee, Aoki Shin-ichi","doi":"10.11190/JER.15.103","DOIUrl":"https://doi.org/10.11190/JER.15.103","url":null,"abstract":"","PeriodicalId":15612,"journal":{"name":"Journal of ecotechnology research","volume":"176 4 1","pages":"103-106"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91539315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
An experimental study and a regression analysis were carried out to find out the growing patterns of Egeria densa at three different NH 4+ -N concentrations as low (2 mgL -1 ), medium (4 mgL -1 ), and high (6 mgL -1 ). DO concentration during respiration and photosynthesis was monitored in daily basis while plant morphological characteristics were examined with harvesting at six-day interval. There was no any significant difference in morphological characteristics indicated at low and medium NH 4+ -N concentrations (p>0.05). On contrary, the total plant length at high NH 4+ -N concentration has deviated significantly (p<0.01) from other two concentrations after 15 days since commencement of the experiment. Averaged relative growth rates (RGRs) were recorded as 0.05, 0.04 and -0.01 mgday -1 in terms of dry weight production for low, medium and high NH 4+ -N concentrations, respectively. The results of the non-linear regression analysis explained the effect of low and medium concentrations over high concentration of NH 4+ -N, while the medium concentration provided the best correlation coefficient (r 2 = 0.901) for the modeled equation. These results can be used in optimizing the effects of E.densa at tertiary wastewater treatment.
{"title":"Responses of Egeria densa to various influent ammonia concentrations: A microcosm study on plant morphology","authors":"S. Weragoda, N. Tanaka, K. Jinadasa, Y. Sasaki","doi":"10.11190/JER.16.1","DOIUrl":"https://doi.org/10.11190/JER.16.1","url":null,"abstract":"An experimental study and a regression analysis were carried out to find out the growing patterns of Egeria densa at three different NH 4+ -N concentrations as low (2 mgL -1 ), medium (4 mgL -1 ), and high (6 mgL -1 ). DO concentration during respiration and photosynthesis was monitored in daily basis while plant morphological characteristics were examined with harvesting at six-day interval. There was no any significant difference in morphological characteristics indicated at low and medium NH 4+ -N concentrations (p>0.05). On contrary, the total plant length at high NH 4+ -N concentration has deviated significantly (p<0.01) from other two concentrations after 15 days since commencement of the experiment. Averaged relative growth rates (RGRs) were recorded as 0.05, 0.04 and -0.01 mgday -1 in terms of dry weight production for low, medium and high NH 4+ -N concentrations, respectively. The results of the non-linear regression analysis explained the effect of low and medium concentrations over high concentration of NH 4+ -N, while the medium concentration provided the best correlation coefficient (r 2 = 0.901) for the modeled equation. These results can be used in optimizing the effects of E.densa at tertiary wastewater treatment.","PeriodicalId":15612,"journal":{"name":"Journal of ecotechnology research","volume":"34 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87832281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Katsuhiko Kurosawa, H. Suganuma, Shin-ichi Aikawa, S. Kawarasaki, H. Hamano, H. Utsugi, Y. Abe, T. Kojima, R. Harper, J. Luff, W. Stock, M. Lund, M. Bannister
Long-term changes in the precipitation data at Sturt Meadows were analyzed by the Mann-Kendall statistics and the Lepage test. Yearly and spring precipitation increased significantly from 1910 to 2008, and the significance levels were p < 0.10 and 0.01, respectively. The data of daily precipitation were classified into two groups (class 1-4 and 5) separated by the distribution of the data, and class 1-4 precipitation increased significantly. There were 4 significant-climatic jumps (1925-27, 1963, 1979-1982 and 1993) by results of the Lepage test. The averages of yearly precipitation during whole years and the latest period are 215.0 and 280.9 mm/year, respectively. The averages of monthly precipitation in February, October and November during the latest period (1993-2008) is higher than those in the previous periods. That in February during the latest period was especially heavy, when the mean precipitation in February was six times higher than that in the previous period. This change was attributed to the increase in the frequency of storm events in February during the latest period. Monthly precipitation exceeding 100 mm/month in February was recorded three times (1995, 2001 and 2006), and this occurred only 2 times in previous periods (1925 and 1975).
{"title":"Long-term Changes in Precipitation Characteristics at Sturt Meadows, Western Australia","authors":"Katsuhiko Kurosawa, H. Suganuma, Shin-ichi Aikawa, S. Kawarasaki, H. Hamano, H. Utsugi, Y. Abe, T. Kojima, R. Harper, J. Luff, W. Stock, M. Lund, M. Bannister","doi":"10.11190/JER.16.27","DOIUrl":"https://doi.org/10.11190/JER.16.27","url":null,"abstract":"Long-term changes in the precipitation data at Sturt Meadows were analyzed by the Mann-Kendall statistics and the Lepage test. Yearly and spring precipitation increased significantly from 1910 to 2008, and the significance levels were p < 0.10 and 0.01, respectively. The data of daily precipitation were classified into two groups (class 1-4 and 5) separated by the distribution of the data, and class 1-4 precipitation increased significantly. There were 4 significant-climatic jumps (1925-27, 1963, 1979-1982 and 1993) by results of the Lepage test. The averages of yearly precipitation during whole years and the latest period are 215.0 and 280.9 mm/year, respectively. The averages of monthly precipitation in February, October and November during the latest period (1993-2008) is higher than those in the previous periods. That in February during the latest period was especially heavy, when the mean precipitation in February was six times higher than that in the previous period. This change was attributed to the increase in the frequency of storm events in February during the latest period. Monthly precipitation exceeding 100 mm/month in February was recorded three times (1995, 2001 and 2006), and this occurred only 2 times in previous periods (1925 and 1975).","PeriodicalId":15612,"journal":{"name":"Journal of ecotechnology research","volume":"3 1","pages":"27-31"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90328212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"PCR-DGGE analytical technique of bacterial community in the Lake Kahokugata water spiked with dimetylarsenic acid","authors":"Maki Teruya, Ueda Kaori, Hirota Wakana, M. Hiroyuki, Kobayashi Fumihisa, Hasegawa Hiroshi, Muhanmad Rahaman","doi":"10.11190/JER.15.91","DOIUrl":"https://doi.org/10.11190/JER.15.91","url":null,"abstract":"","PeriodicalId":15612,"journal":{"name":"Journal of ecotechnology research","volume":"70 1","pages":"91-95"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91372854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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