Response of Maize Growth and Water-Photosynthesis Characteristic to Different Combination of Air Humidity with Soil Moisture

LI Yangyang; HUANG Zhanbin; HUANG Shaoyan

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Response of Maize Growth and Water-Photosynthesis Characteristic to Different Combination of Air Humidity with Soil Moisture

- Response of Maize Growth and Water-Photosynthesis Characteristic to Different Combination of Air Humidity with Soil Moisture
- Bulletin of Soiland Water Conservation Vol. 18, Issue 2, Pages: 23-26(1999)
- 作者机构：
  
  中国科学院水利部水土保持研究所, 陕西杨陵,712100
- 作者简介：
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- Published：1999
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LI Yangyang, HUANG Zhanbin, HUANG Shaoyan. Response of Maize Growth and Water-Photosynthesis Characteristic to Different Combination of Air Humidity with Soil Moisture[J]. Bulletin of Soiland Water Conservation, 1999, 18(2): 23-26.
DOI：

LI Yangyang, HUANG Zhanbin, HUANG Shaoyan. Response of Maize Growth and Water-Photosynthesis Characteristic to Different Combination of Air Humidity with Soil Moisture[J]. Bulletin of Soiland Water Conservation, 1999, 18(2): 23-26. DOI：

摘要

通过对不同土壤大气湿度组合下玉米生长、水分及光合特性的研究，认为土壤水分亏缺对玉米的影响要超过大气干旱。玉米的水分状况及生理活性主要决定于土壤的水分条件。短期干旱使气干土干、气湿土干处理净光合速率下降的主要原因是非气孔限制，而气干土湿处理前期光合速率下降主要是由于气孔限制，后期则为非气孔限制。短期干旱过程中各处理的干物质仍持续增加

Abstract

Through the research of growth

water and photosynthesis characteristic of maize under different combination of air humidity with soil moisture

the results showed the harm of soil water deficit exceeded that of air drought

water status and physiological activities were mainly decided by soil moisture. Short-term drought made photosynthetic rate decrease. For soil dry treatments

the main reason was nonstomatal limitation

but for air-dry-soil-wet treatment

stomatal limitation at first but nonstomatal limitation later. Dry matter continued to increase during the period of short-term drought.

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