| Research on spatialtemporal evolvement characters of agroclimatic resources for spring maize in Jilin Province |
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| DOI：10.7606/j.issn.1000-7601.2011.03.45 |
| Key Words: spring maize production potential of photo-temperature potential productivity numerical simulation |
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| Abstract: |
| Numerical simulation of the agroclimatic resources for spring maize in Jilin Province from 1961~2008 was conducted to analyse the spatial temporal evolvement characters of the production potential of photo temperature and climatic potential productivity. The results showed that:the average production potential of photo temperature was 25 t/hm2，descending from northwest to southeast，and it was over 25 t/hm in the west and middle, while it was less in the east. The production potential of photo temperature was going up in recent 50 years, and the variation of the production potential of photo temperature was relatively small between years and decades . The average potential climatic productivity was 14.7 t/hm2, increasing from northwest to southeast，the highest productivity was in east , higher in middle, the low-
est in west， and it was going down in recent 50 years， while the its variation was relatively obvious between years and decades. Water is a main factor which restricts spring maize yield in midwest Jinlin，and the potential production of water was computed with the favorable water for spring maize growth，showing a descending trend from northwest to southeast. |