| Study on dynamic variation of TEP in the growth period of maize and relationship between TEP and biomass of maize in eastern Gansu in recent 15 years |
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| DOI：10.7606/j.issn.1000-7601.2010.06.43 |
| Key Words: maize thermal effectiveness of photosynthetically active radiation biomass eastem Gansu |
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| Abstract: |
| Based on data of maize in test field in Xifeng Agrometerological Experiment Station and meterological da-ta of Xifeng National Base Climatic Station from 1994~2008，the model of TEP (thermal effectiveness photosynthetically
active radiation) was set up to assess the degree of utilization of solar radiation, and the impact of solar radiation, tem-perature and TEP distribution on the growth and accumulation of biomass of maize was analyzed. The results showed that the trend of accumulated temperature turned to increase and solar radiation to decrease during the maize ’s growth period since the mid 1990s. The difference of TEP was small among 15 years but it showed big difference in seeding stage to three leaves stage and milky maturity stage to maturity stage. The suitability of temperature kept in high level during sev-en leaves stage to jointing stage，tasseling stage to milky maturity stage and seeding stage to three leaves stage and kept in low level during jointing stage to tasseling stage, milky maturity stage to maturity stage. The correlation cofficient be-tween the value of PET and biomass of leaves in jointing stage to tasseling stage , biomass of stack in milky maturity stage to maturity stage, biomass of ear in tasseling stage to milky maturity stage passed the reliability of 0.1 of hypothesis test. It showed that the value of PET in these growth stages is the main factor of influence to the biomass of all organs of maize. |
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