结果表明玉米苗期调亏处理能延缓后期叶片和根系衰老，保持较高的光合速率、蒸腾速率和根系活力。
The results indicated that RDI could postpone leaf senescence and increase photosynthesis rate, transpiration rate and root activity in later stage.
结果表明：正常生长情况下，腐植酸复合肥能提高草莓的根系活力、叶绿素含量和叶片光合速率。
The experimental result showed that: Nonnally, the Humic acid fertilizer can increase root vitality, Chlorophyll content and photosynthesis rate.
衰老后期，根系活力、叶片光合速率和叶绿素含量快速下降，叶片气孔阻力增加。
Photosynthetic rate and chlorophyll content of flag leaf declined sharply, and leaf stomatal resistance increased rapidly in late period of senescence.
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