| Response of population structure of maize to annual changes of meteorological factors |
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| DOI：10.7606/j.issn.1000-7601.2013.06.009 |
| Key Words: maize population structure meteorological factor suitable density yield |
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| Abstract: |
| The relationship between annual changes of meteorological factors and population structure of maize were studied through the 5-year experiment with Danyu 39 (late maturing variety) and Zhengdan 958 (mid-late maturing variety) as test materials. The results indicated that the annual changes of meteorological factors had a significant effect on the population structure of maize and caused the changes of optimum density and suitable density range of different maize hybrids which affected the yield finally. Precipitation and its temporal distribution were the most important factors affecting population structure, followed by the sunshine duration. Leaf area index (LAI) was most heavily affected, followed by leaflet orientation value (LOV), plant height and light transmittance. LAI was influenced greatly by the precipitation in the last ten-day of June; LOV was closely related to the sunshine duration in the first ten-day of July; and plant height was fundamentally affected by the precipitation in formative period of plant height. |
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