| Effects of irrigation on winter wheat photosynthetic character and canopy structure |
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| DOI：10.7606/j.issn.1000-7601.2009.06.12 |
| Key Words: irrigation winter wheat canopy structure photosynthetic character yield character |
| Author Name | Affiliation | | WANG Yitao | Xinjiang Agricultural University, Urumqi, Xinjiang 830000, China | | YI Ying | Shenyang Agricultural University, Shenyang, Liaoning 110161, China | | ZHANG Jianxin | Xinjiang Agricultural University, Urumqi, Xinjiang 830000, China | | HOU Libai | Shenyang Agricultural University, Shenyang, Liaoning 110161, China | | KANG Jiantao | Xinjiang Agricultural University, Urumqi, Xinjiang 830000, China | | DONG Xiangkai | Shenyang Agricultural University, Shenyang, Liaoning 110161, China |
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| Abstract: |
| rrigation treatments are conducted in different growth stages of winter wheat to study their effects on winter wheat canopy structure,photosynthetic character and yield.The results show that two irrigation treatment(in winter period and jointing stage) the chlorophyll content and LAI of winter wheat always maintain a high level in the whole growth period,while they show an inverted “V”-type in the early filling stage and flowering stage.The effects of irrigation treatments on the DIFN are in opposite to the trends of LAI changes.Two irrigation treatment the winter wheat flag leaf net photosynthetic rate,stomatal conductance and transpiration rate increase more significantly compared to one irrigation treatment(in winter or jointing stage),and intercellular CO2 concentration decreases.The yield of all three varieties of P12,138 and M808 reaches the maximum in the two irrigation treatment,reaching 5 045 kg/hm2,5 516 kg/hm2 and 5 479 kg/hm2, respectively. |
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