| Project/Area Number |
16255014
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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 | 海外学術 |
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| Research Field |
Boundary agriculture
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| Research Institution | Tottori University |
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Principal Investigator |
FUJIYAMA Hideyasu Tottori University, Faculty of Agriculture, Professor (90108796)
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| Co-Investigator(Kenkyū-buntansha) |
YAMAMOTO Sadahiro TOTTORI UNIVERSITY, Faculty of Agriculture, Professor (30200801)
YAMADA Satoshi TOTTORI UNIVERSITY, Faculty of Agriculture, Associate Professor (80294346)
OKA Mariko TOTTORI UNIVERSITY, Faculty of Agriculture, Lecturer (20324999)
SANEOKA Hirofumi Hiroshima University, Graduate School of Biosphere Science, Associate Professor (70162518)
MASUNAGA Tugiyuki Shimane University, Faculty of life and Environmental Science, Associate Professor (10325045)
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| Project Period (FY) |
2004 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥34,320,000 (Direct Cost: ¥26,400,000、Indirect Cost: ¥7,920,000)
Fiscal Year 2007: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
Fiscal Year 2006: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
Fiscal Year 2005: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
Fiscal Year 2004: ¥9,620,000 (Direct Cost: ¥7,400,000、Indirect Cost: ¥2,220,000)
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| Keywords | Salt accumulation / Salt stress / Soil amendment / Phytoremediation / Saline soil / Sodic soil / Salt tolerance / Pepper / メキシコ南バハカリフォルニア / アッケシソウ / 栄養障害 / コモンドウ地域 / 拮抗作用 / ナトリウム / 電気伝導度 / 潅漑水 / メキシコ南バハカリフォルニア州 / コモンドゥ / ラパス / ビスカイノ |
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| Research Abstract |
The actual condition of soils and crops in the State of South Baja California, Mexico, was investigated from viewpoints of salt accumulation in soil and nutritional disorder of crops. The most severe soil deterioration by salts was found in Comondu area where growth of crops, especially of fruit crops, was suppressed by salt stress. The study, therefore, was concentrated in this area thereafter. Nutritional disorder was found in citrus and mango in which symptoms of salt injury were found in leaves. The content of K, Mn and Zn in leaves was low and that of Na was high, which obviously reflected soil condition.
A simple method for risk judgment of salt accumulation in soil from analysis of soil data in Comondu area was presented for farmers. The factors related to salt accumulation were scored and summed up. The summed score was then multiplied by a coefficient based on irrigation (method and amount). The total score can be easily used for judgment of salt accumulation risk.
Phytoremediation of salt-affected soil by highly salt tolerant crops such as Salicornia, Swiss chard, Kochia and beet, which are utilized for food and forage, was proposed from their response to salts. It was found that Salicornia could be utilized for remediation of sodic soil and other three species for saline soil.
The difference between cultivars of peppers in response to salts was investigated. Pepper is the most important crop in the State of South Baja California. It is proposed that selection of cultivars that can translocate smaller amount of Na and accumulate more ascorbic acid in fruits is important in order to maintain high productivity and quality of fruits.
We will develop these outcomes to recognize actual condition of soil deterioration in arid regions in the world and to amend conserve soil condition by phytoremediation.
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