| Effects of nitrogen nutrition on flag leaves photosynthesis of spring wheat Liaochun 10 under different relative soil water content |
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| DOI：10.7606/j.issn.1000-7601.2008.05.29 |
| Key Words: spring wheat photosynthesis nitrogen nutrition relative soil water content |
| Author Name | Affiliation | | WANG Guojiao | Shenyang Agricultural University, Shenyang, Liaoning 110161, China | | SUN Bei | Shenyang Agricultural University, Shenyang, Liaoning 110161, China | | WANG Jiayu | Shenyang Agricultural University, Shenyang, Liaoning 110161, China | | CAO Ying | Shenyang Agricultural University, Shenyang, Liaoning 110161, China |
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| Abstract: |
| A pot experiment was conducted to study the effect of nitrogen nutrition on flag leaves photosynthesis at the tilling stage of spring wheat Liaochun 10 under different soil water content. The results showed that the photosynthesis of spring wheat was strengthened with the increasing of SRWC. Under the condition of the relative soil water content below 45 percent, the stomatal conductance, transpiration rate and WUEleaf in flag leaves decreased, while the intercellular CO2 concentration increased with the increasing N fertilizer. The decrease of photosynthesis rate was limited by non-stomatal factor. When the relative soil water content was between 45 and 75 percent, with the increasing of N fertilization and SRWC, photosynthesis rate, stomatal conductance, transpiration rate and WUEleaf increased, while intercellular CO2 concentration reduced. The increase of photosynthesis rate was limited by stomatal factor. The stimulative effects of nitrogen nutrition on flag leaves photosynthesis of spring wheat reduce under the condition of the relative soil water content beyond 75 percent. |
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