| Characteristic of soil moisture change of wheat field in Xifeng |
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| DOI：10.7606/j.issn.1000-7601.2006.06.34 |
| Key Words: Xifeng soil moisture vertical distribution time distribution wheat output |
| Author Name | Affiliation | | ZHANG Hong-fen | Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu province Institute of Arid Meteorology China Meteorological Administratio,Lanzhou,Gansu 730020,China；Qingyang Meteorological Bureau,Xifeng,Gansu 74500,China | | WANG Jin-song | Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu province Institute of Arid Meteorology China Meteorological Administratio,Lanzhou,Gansu 730020,China | | GUO Jiang-yong | Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu province Institute of Arid Meteorology China Meteorological Administratio,Lanzhou,Gansu 730020,China；Qingyang Meteorological Bureau,Xifeng,Gansu 74500,China |
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| Abstract: |
| The ten-day and monthly changes the vertical distribution characteristic and the yearly changes of soil moisture as well as the relationship between the monthly soil moisture content and winter wheat output are analyzed by using the data of soil moisture during March to November from the year1989to2004in Xifeng. The results show that the annual vibration of the soil moisture content is obvious and with multiwaves；the content of soil moisture has obvious monthly change the maximum of soil moisture content is in November and in March and the minimum is in June and July；the content of soil moisture has a obvious vertical variation it changes much in layer from0to50cm changes slow in layer from60to130cm and stabilizes in layer from140 to 200 cm；the soil moisture content has two remarkable influence stages to the winter wheat output．they are in March to May and September respectively. |
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