| Analysis of growth parameters and yield of spring maize under chilling stress |
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| DOI：10.7606/j.issn.1000-7601.2013.01.34 |
| Key Words: chilling stress spring maize growth parameters yield |
| Author Name | Affiliation | | FENG Rui | Institute of Atmospheric Environment, China Meteorological Administration, Shenyang, Liaoning 110016, China | | WU Jinwen | Institute of Atmospheric Environment, China Meteorological Administration, Shenyang, Liaoning 110016, China | | JI Ruipeng | Institute of Atmospheric Environment, China Meteorological Administration, Shenyang, Liaoning 110016, China | | ZHANG Yushu | Institute of Atmospheric Environment, China Meteorological Administration, Shenyang, Liaoning 110016, China | | WANG Lianmin | Institute of Crop Tillage and Cultivation, Heilongjiang Academy of Agricultural Sciences, Harbin, Heilongjiang 150086, China | | WANG Hongbo | Institute of Atmospheric Environment, China Meteorological Administration, Shenyang, Liaoning 110016, China | | YU Wenying | Institute of Atmospheric Environment, China Meteorological Administration, Shenyang, Liaoning 110016, China |
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| Abstract: |
| Using Xianyu335 as material, the experiment was ca
rried out to analyze the influence of chilling stress (15℃) at jointing stage a
nd bell mouthed stage on growth parameters and yield of spring maize. The resul
ts showed that chilling stress led to the significant reduction of plant height,
plant biomass and leaf area, and the influence of chilling stress at jointing s
tage was more serious than that at bell-mouthed stage. The photosynthetic rate a
nd transpiration rate decreased significantly under chilling stress, by around 1
0% and 58%～64% respectively. The response characteristics of canopy spectral re
flectance to chilling stress at different developmental stages were the same on
the whole. In visible band, the canopy spectral reflectance under chilling stres
s was increased, while in near infrared band (780～1 350 nm), it was decreased
obviously. The yield of spring maize under chilling stress at jointing stage was
reduced by 34% and that at bell-mouthed stage was reduced by 38%. Therefore, t
he influence of chilling stress at bell-mouthed stage was more remarkable than
that at jointing stage. |
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