No-Tillage Enhanced the Dependence on Surface Irrigation Water in Wheat and Soybean
No-tillage often affects crop root development due to the higher mechanical impedance to root elongation, resulting in yield reduction under an unfavorable rainfall pattern, such as drought. In this study, we analyzed the changes in water source of wheat and soybean under drought stress in a continu...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2007-01-01
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| Series: | Plant Production Science |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1626/pps.10.182 |
| _version_ | 1828846090743447552 |
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| author | Morio Iijima Satoru Morita Walter Zegada-Lizarazu Yasuhiro Izumi |
| author_facet | Morio Iijima Satoru Morita Walter Zegada-Lizarazu Yasuhiro Izumi |
| author_sort | Morio Iijima |
| collection | DOAJ |
| description | No-tillage often affects crop root development due to the higher mechanical impedance to root elongation, resulting in yield reduction under an unfavorable rainfall pattern, such as drought. In this study, we analyzed the changes in water source of wheat and soybean under drought stress in a continuous no-tillage field. Deuterium-labeled irrigation water was applied at different growth stages of crops to analyze their water uptake pattern. Mechanical impedance of the surface soil was 3.5 and 4.4 times higher in the no-tillage than in the conventional tillage under wet and drought conditions, respectively. Root length density and root branching index (the length of lateral roots per unit axile root length) of soybean in the surface soil layer were higher in the no-tillage field. This indicates that the increased branching by the higher mechanical impedance of undisturbed surface soil causes roots to accumulate in the surface soil layer. The deuterium concentration in the xylem sap of both crops was significantly higher in the no-tillage than in the tillage under a drought condition. This indicates that the crops in the no-tillage field depend highly on the newly supplied easily accessible water (irrigation water and/or rainfall) as compared with those in the conventional tillage field under a limited water supply. In conclusion, enhanced surface root growth in the no-tillage condition would result in higher dependence on surface supplied irrigation water than in the conventional tillage under drought. |
| first_indexed | 2024-12-12T21:41:19Z |
| format | Article |
| id | doaj.art-9e3be91a4508479f812d194ab730dcea |
| institution | Directory Open Access Journal |
| issn | 1343-943X 1349-1008 |
| language | English |
| last_indexed | 2024-12-12T21:41:19Z |
| publishDate | 2007-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Plant Production Science |
| spelling | doaj.art-9e3be91a4508479f812d194ab730dcea2022-12-22T00:11:02ZengTaylor & Francis GroupPlant Production Science1343-943X1349-10082007-01-0110218218810.1626/pps.10.18211644828No-Tillage Enhanced the Dependence on Surface Irrigation Water in Wheat and SoybeanMorio Iijima0Satoru Morita1Walter Zegada-Lizarazu2Yasuhiro Izumi3Nagoya UniversityNagoya UniversityNagoya UniversityThe University of Shiga PrefectureNo-tillage often affects crop root development due to the higher mechanical impedance to root elongation, resulting in yield reduction under an unfavorable rainfall pattern, such as drought. In this study, we analyzed the changes in water source of wheat and soybean under drought stress in a continuous no-tillage field. Deuterium-labeled irrigation water was applied at different growth stages of crops to analyze their water uptake pattern. Mechanical impedance of the surface soil was 3.5 and 4.4 times higher in the no-tillage than in the conventional tillage under wet and drought conditions, respectively. Root length density and root branching index (the length of lateral roots per unit axile root length) of soybean in the surface soil layer were higher in the no-tillage field. This indicates that the increased branching by the higher mechanical impedance of undisturbed surface soil causes roots to accumulate in the surface soil layer. The deuterium concentration in the xylem sap of both crops was significantly higher in the no-tillage than in the tillage under a drought condition. This indicates that the crops in the no-tillage field depend highly on the newly supplied easily accessible water (irrigation water and/or rainfall) as compared with those in the conventional tillage field under a limited water supply. In conclusion, enhanced surface root growth in the no-tillage condition would result in higher dependence on surface supplied irrigation water than in the conventional tillage under drought.http://dx.doi.org/10.1626/pps.10.182Deep rootHeavy waterSoil mechanical impedanceStable isotopeSustainable agricultureWater sourceWater uptake |
| spellingShingle | Morio Iijima Satoru Morita Walter Zegada-Lizarazu Yasuhiro Izumi No-Tillage Enhanced the Dependence on Surface Irrigation Water in Wheat and Soybean Plant Production Science Deep root Heavy water Soil mechanical impedance Stable isotope Sustainable agriculture Water source Water uptake |
| title | No-Tillage Enhanced the Dependence on Surface Irrigation Water in Wheat and Soybean |
| title_full | No-Tillage Enhanced the Dependence on Surface Irrigation Water in Wheat and Soybean |
| title_fullStr | No-Tillage Enhanced the Dependence on Surface Irrigation Water in Wheat and Soybean |
| title_full_unstemmed | No-Tillage Enhanced the Dependence on Surface Irrigation Water in Wheat and Soybean |
| title_short | No-Tillage Enhanced the Dependence on Surface Irrigation Water in Wheat and Soybean |
| title_sort | no tillage enhanced the dependence on surface irrigation water in wheat and soybean |
| topic | Deep root Heavy water Soil mechanical impedance Stable isotope Sustainable agriculture Water source Water uptake |
| url | http://dx.doi.org/10.1626/pps.10.182 |
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