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Movement of Soil Water and Cattle Urine-N under the Shallow Groundwater Level in the Volcanic Ash Soil

Research Project

Project/Area Number 04660258
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 農業土木
Research InstitutionMiyazaki University

Principal Investigator

TOYOMITSU Yukio  Miyazaki University, Faculty of Agriculture, Research Associate, 農学部, 助手 (70197979)

Co-Investigator(Kenkyū-buntansha) SUGIMOTO Yasuhiro  Miyazaki University, Faculty of Agriculture, Professor, 農学部, 教授 (20041030)
MUTO Isao  Miyazaki University, Faculty of Agriculture, Associate Professor, 農学部, 助教授 (70040863)
Project Period (FY) 1992 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1994: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1993: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1992: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsVolcanic ash soil / Pasture / Groundwater / Soil water / Rainfall / Leaching / Urine nitrogen / 尿 窒素 / 汎用農地
Research Abstract

To know the relationship between agricultural production and water polution, the movement of soil water and nitrate nitrogen in the volcanic ash soil have been researched. The experiment was conducted at the Miyazaki University Farm, Japan. Average rainfall in Miyazaki is 2400 mm per year. The groundwater level lies between 0-350cm depth from the ground surface. The results are as follows ;
1. The soil water content just before rain started and the distribution of rainfall influences on the velocity of soil water movement after rain started and the distribution of rainfall influences on the velocity of soil water movement after rain stopped. The reaction time of soil water pressure at 150 cm depth and groundewater level were 5-50 hours from rain started.
2. After the application of cattle urine to the experimental plot, the soil water was extracted and analyzed nitrate nitrogen concentrations. Leaching of nitrate nitrogen through soil was from early September to early November. Large quantity of rainfall occurred within this period.
3. After the application of cattle urine to the experimental plot, the soil samples were taken and analyzed nitrate nitrogen concetrations. In case of cattle urine applied in summer, leaching of nitrate nitrogen through soil was 38 % of applied nitrate nitrogen in 54 days. In case of cattle urine applied in autumn, leaching of nitrate nitrogen through soil was 47% of applied nitrate nitrogen in 174 days.
4. N-labelled cattle urine was applied to small plots in bahiagrass to trace the fate of urine-N in the soil-plant system. After one year, recovery of ^<15>N in measured components was similar for each application date. Between 27-35 % of the applied ^<15>N was recovered in the plant parts with a further 9-12 % remaining in the soil and 1-2 % in litter. Of the ^<15>N applied, 54-60 % was unacounted for in the soilplant system after one year.

Report

(4 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • 1992 Annual Research Report
  • Research Products

    (2 results)

All Other

All Publications (2 results)

  • [Publications] 杉本安寛: "牧草地における尿窒素の動態に関する研究 2.バヒアグラス草地における^<15>N-尿素態窒素を指標とした牛尿窒素の動態" 日本草地学会誌. 40. 325-332 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Yasuhiro SUGIMOTO: "Nitrogen Dynamics of Urine in Pasture 2. Fate of cattle urine-N labelled with ^<15>N-urea in bahiagrass (Paspalum notatum Flugge) pasture." JOUNAL OF JAPANESE SOCIETY OF GRASSLAND SCIENCE. Vol.40 No.3. 325-332 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary

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Published: 1992-04-01   Modified: 2016-04-21  

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