| Preliminary study on model of cultural factors and leaf area index of maize |
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| DOI：10.7606/j.issn.1000-7601.2010.02.15 |
| Key Words: leaf area index of maize cultivating factors uniform design mathematical model |
| Author Name | Affiliation | | BAI Sha | Resources and Environment College，Shanxi Agriculture University, Taigu, Shanxi 030801, China | | CHI Baoliang | Dryland Agriculture Research Center, Shanxi Academy of Agricultural Sciences, Taiyuan, Shanxi 030031, China | | HUANG Xuefang | Dryland Agriculture Research Center, Shanxi Academy of Agricultural Sciences, Taiyuan, Shanxi 030031, China | | FAN Wenhua | Resources and Environment College，Shanxi Agriculture University, Taigu, Shanxi 030801, China | | FAN Xiuwu | Institute of Crops Genetics, Shanxi Academy of Agricultural Sciences, Taiyuan, Shanxi 030031, China |
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| Abstract: |
| An experiment was conducted to study the effect of water, fertilizer and other cultivating factors on leaf area index of maize whe
n the leaves spread by uniform experiment design and stepwise regression method using Xianyu335 as the experimental material. By Multiple Factors Analysis, the
influence order is: base nitrogen＞nitrogen topdressing＞base phosphorus＞planting density＞supplementary irrigation＞growth stages of supplementary fertilizer and irrigation＞base potassium＞sowing date. In the mathematical model, the coupling effect between cultivating factors on leaf area index of maize reaches the significant level. In the research bound of this experiment, the result is that the leaf area index of maize achieves the highest theoretical value 6.64 when the sowing date is May 11, the planting density is 80 999.8 strain/hm2, the base nitrogen is 48.2 kg/hm2, the base phosphorus is 293.6 kg/hm2, the base potassium is 152.0 kg/hm2, the nitrogen topdressing is 62.8 kg/hm2, the supplementary irrigation is 1199.4 m3/hm2, and the supplementary fertilization and irrigation is made in the growth stage when the eighteenth leaf of maize spreads completely. |
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