| Project/Area Number |
04452291
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
農業土木
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| Research Institution | SHINSHU UNIVERSITY |
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Principal Investigator |
SAKAI Shinichi Shinshu University, Faculty of Agriculture, Professor Dr., 農学部, 教授 (60021052)
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| Co-Investigator(Kenkyū-buntansha) |
MORIMOTO Naotake Shinshu University, Faculty of Agriculture, Professor Dr., 農学部, 教授 (80021054)
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| Project Period (FY) |
1992 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥4,500,000 (Direct Cost: ¥4,500,000)
Fiscal Year 1994: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1993: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1992: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Keywords | ripened compost / test of continuous application of ripened compost / residues of organic substance / cleading compost / xeric mid-sized soil animals / salts accumulation / water-holding ability / aggregate structure / 熟成堆肥 / 堆肥の連用 / 土壌の生物活性 / 中型土壌動物 / T / R比 / 土壌の物理性 / 土壌の化学性 / 堆肥施用 / 土壌団粒 / 乾性土壌動物 |
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| Research Abstract |
The aim of the present study is to examine the effect of continuous application of riprened compost on the soil improvement of farm land.
The test designs of continuous application of ripened compost are as follows : "(1)", "(2)" and "(3)"the amounts of ripend composts were differed such as lt, 3t and 10t/10a, respectively. "(4)" and "(5)" thickness of the cover materials for cleading the composts was 1cm and 3cm, respectively. "(6)" chemical fertilizers were applied. "(7)" any fertilizer were not applied.
The results were summerized comparing ripened compost use plot with chemical fertilizer one.
1.Physical features of the soil : Aggregate structure, water-holding ability, water-permeability, swelling and softening and rising up the temperature of the soil were observed in proportion to the amount of ripened compost.
2.Chemical features of the soil : Accumulation of nitrogen and available potassium of the soil were accelerated. In addition, water-buffer action of the soil became large and decline of pH of the soil were controlled.
3.Biological features of the soil : Species and number of individuals of mite and ticks in the soil were abundant.
4.Crop cultivation : After the 3rd year when the ripened compost application started, stabilization of crop yield was established.
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