| The correlation of precipitation during jointing to heading with output and biological yield in East of Gansu Province |
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| DOI：10.7606/j.issn.1000-7601.2007.01.36 |
| Key Words: East of Gansu Province maize precipitation output correlation |
| Author Name | Affiliation | | HUANG Bin | Institute of Arid Meteorology CMA Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province,Lanzhou,Gansu 730020,China；Qingyang city meteorological bureau,Xifeng,Gansu 745000,China | | GUO Jiang-yong | Institute of Arid Meteorology CMA Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province,Lanzhou,Gansu 730020,China；Qingyang city meteorological bureau,Xifeng,Gansu 745000,China | | ZHANG Hong-fen | Qingyang city meteorological bureau,Xifeng,Gansu 745000,China | | ZHANG Mou-cao | Qingyang city meteorological bureau,Xifeng,Gansu 745000,China | | WANG Wei-tai | Qingyang city meteorological bureau,Xifeng,Gansu 745000,China |
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| Abstract: |
| Based on the data of the precipitation during jointing to heading and the output and biological yield of maize on Loess Plateau in East of Gansu,the correlations of precipitation with output and biological yield were analyzed.The results showed that the correlation coefficient between the precipitation during jointing to heading and the output reached 0.8304,with 0.001 confidence degree reached very significant level.It affected the output components,mainly the spike length,the weight of 100-grais and the spike thick.The correlation of the precipitation with the fresh matter weight and dry matter weight during jointing to maturity is positive,but is not significant,and its effect on spike increased.The complete agreement of rainfall year type with output year type accounted for 50%.The complete and main agreement accounted for 75%.The year of least rainfall is 1997,the rainfall is 19.1 mm,and the maize output is 137.2 kg/667m2. The year of most rainfall is 2005,the rainfall is 185.3 mm,and the maize output is 662.1 kg/667m2. The output model forecasted using precipitation was set up. |
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