1997 Fiscal Year Final Research Report Summary
Effect of cultivated environments on eating quality and taste of paddy rice
| Project/Area Number |
07556006
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
作物学
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| Research Institution | Niigata University |
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Principal Investigator |
IKEDA Takeshi Niigata Univ., Faculty of Agriculture, Professor, 農学部, 教授 (40005658)
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| Co-Investigator(Kenkyū-buntansha) |
YOSHIDA Ryuji Toyama Prefectural Collage, Associate Professor, 短期大学部, 助教授 (40089016)
YAMAMOTO Yoshinori Kochi Univ., Faculty of Agricultre, Professor, 農学部, 教授 (00093956)
MATSUDA Toshiaki Ibaragi Univ., Faculty of Agriculture, Professor, 農学部, 教授 (50007788)
KUJIRA Yukio Kanazawa Univ., Faculty of Education, Associate Pro., 教育学部, 助教授 (20126577)
ANDO Ho Yamagata Univ., Faculty of Agriculture, Professor, 農学部, 教授 (90005661)
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| Project Period (FY) |
1995 – 1997
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| Keywords | Taste / Slow released fertilizer / Nitrogen content / Milled rice / Root system / Rice cultivar 'Koshihikari' / Topdressing / Region along the Japan Sea |
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| Research Abstract |
Three year's experiments were summarized as follows :
Niigata University 1995, Yield in Koshihikari was shown as following order across the treatments : LP100 (slow released fertilizer, available during 100 days) >LP30>LP50>LP70>Control N% in milled rice was the lowest in control and LP30.1996, N% tended to be higher in southern than in northern parts of Japan, however oil % not clear according to infra-red analyzer. 1997, Yield was higher in A type's dressings than in V type's ones and N% was lower in A type's ones.
Yamagata University 1995, The effeciency of N amount to produce the number of grains per unit area (ENG) at heading was higher in earlier topdressing (30 days before heading) and in smaller shading. The later topdressing produce higher N% in milled grain. 1996, In case of distributing the basal dressing in deeper layr, ENG became lower and N% in milled grain was higher. 1997, The higher correlation was shown between N% per a rough rice at full heading date and N% in milled grain.
Kanazawa University 1995, The score in eating quality was 94 and 74 in case of conventional and nontillage transplanting plots with LP70 respectively. 1996, The root distributed below 10cm soil layr increased with applying Calsium sulfade (gypssum). The better eating quality was shown in LP fertilizer than in manure. 1997, N% in milled rice was higher and whole grain ratio was getting to be lower with applying organic fertilizer (fermented organic fertilizer by micro-organism).
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