| Comparison of effects of different soil water conditions and phosphorus application on photosynthesis and yield of wheat |
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| DOI：10.7606/j.issn.1000-7601.2009.05.08 |
| Key Words: water phosphorus wheat photosynthesis function yield |
| Author Name | Affiliation | | ZENG Guangwei | College of Agronomy and Plant Protection Qingdao Agricultural University, Qingdao, Shandong 266109, China | | LAN Jinhao | College of Agronomy and Plant Protection Qingdao Agricultural University, Qingdao, Shandong 266109, China | | LIU Yiguo | College of Agronomy and Plant Protection Qingdao Agricultural University, Qingdao, Shandong 266109, China | | LI Lingyan | College of Agronomy and Plant Protection Qingdao Agricultural University, Qingdao, Shandong 266109, China | | LIN Qi | College of Agronomy and Plant Protection Qingdao Agricultural University, Qingdao, Shandong 266109, China |
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| Abstract: |
| The research was carried out at Laiyang experiment station of Qingdao Agricultural University from 2007 to 2008 under rain-sheltered proof culture conditions.Effects of water stress, proper water and different phosphorus application on photosynthesis and yield of wheat was studied.The results showed that the two factors of water and phosphorus had an important impact on photosynthesis function and yield of wheat.Leaf area index and chlorophyll increased with the increase of the proportion of soil water content in field water capacity and phosphorus quantity.Proper soil water content ccould extend the high value duration of grain filling and improve stomatal conductance, photosynthetic rate and yield.Stomatal conductance and photosynthetic rate increased with the increase of phosphorus quantity under treatments of different application of phosphorus.Spike number, 1000-grain weight and yield increased with the increase of phosphorus within the limit of phosphorus application between 75 and 150 kg·hm-2, but declined when it was higher than 150 kg·hm-2.Though the treatment of 75% field water capacity and 150 kg·hm-2 phosphorus application achieved the highest yield, it had no siganificant difference with the treatment of 55% field water capacity and 150 kg·hm-2 phosphorus application.Therefore, the latter treatment was the best combination of water and fertilizer, which achieved the cultivation purpose of saving water and fertilizer. |
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