| Project/Area Number |
10460032
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Plant nutrition/Soil science
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| Research Institution | SAGA UNIVERSITY |
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Principal Investigator |
YAMAMURO Sigekazu SAGA UNIVERSITY, PROFESSOR, 農学部, 教授 (30274583)
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| Co-Investigator(Kenkyū-buntansha) |
YANAI Junta KYOTO UNIVERSITY, 大学院・農学研究科, 助手 (00273491)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1999: ¥2,200,000 (Direct Cost: ¥2,200,000)
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| Keywords | ^<13>C / ^<15>N / compost / 有機栽培 / 有機質堆肥 / 重窒素標識堆肥 / 重炭素標識堆肥 / 土壌中における堆肥の動態 / 重炭素(^<13>C)標識堆肥 / 重窒素(^<15>N)標識堆肥 |
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| Research Abstract |
Recently, animal manure was rediscovered as being significant to agricultural ecosystems, and the nitrogen kinetics have been studied with ^<13>C and ^<15>N labelled manure to grasp the optimum methods of animal manure appolication. The uptake ratios of nitrogen derived from animal manures on various crops were revealed through those studies.
Production of ^<13>C and ^<15>N labelled manure.
^<13>C and ^<15>N-labelled dent corn was cultivated in glass house by applying (^<15>NH_4)_2SO_4 and K^<15>NO_3 (about 10 atom% ^<15>N each) and ^<13>CO_2. After harvesting, dent corn was broken into pieces with a cokefodder crusher and silaged for about 2 moths as cow feed.
A cow (about 150 kg weight) was fed with ^<15>N-labelled cattle feces was collected daily for 2 dags, and ^<13>C and ^<15>N-labelled were collected daily for days. By addition of water and sawdust to them, moisture and C/N ratio of those cattle feces became about 65% and 40, respectively. About 0.5kg of the materials were composted in a styrofoam box at 50℃ for 3 months.
The manure was sometimes mixed to promote the composting, and water was added when the manure was dried up during the composting period. As a result, ^<13>C-and ^<15>N-labelled manure composts were obtained. From 1 to 2% of the ^<13>C and ^<15>N in the compost were absorbed directly by rice plant and from 10 to 13 of the ^<13>C in the compost were absorbed directly by dent corn plant.
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