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作者	单位
商健，刘义国，姜雯，张洪生，林琪，赵长星	（青岛农业大学农学与植物保护学院，山东省旱作农业技术重点实验室，旱作节水创新团队，山东青岛 266109）

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中文摘要:

为给冬小麦滴灌技术推广提供科学依据，以冬小麦品种青麦7号为材料，在全生育期灌水定额（1 800 m·hm^-2）相同条件下，通过大田试验研究了4种滴灌模式（T3：一管三行、T4：一管四行、T5：一管五行、T6：一管六行）对冬小麦花后光合特性和产量的影响。结果表明，与无灌溉处理（CK）相比，滴灌冬小麦花后旗叶光合速率（Pn）、气孔导度（Gs）、蒸腾速率（Tr）显著升高，胞间CO₂浓度（Ci）显著降低，叶绿素含量下降缓慢。不同滴灌模式间冬小麦旗叶光合特性也存在差异，灌浆前期Pn、Gs、Tr表现为T5＞T4＞T6＞T3，灌浆后期表现为T5＞T4＞T3＞T6。不同处理间产量表现为T5＞T4＞T6＞T3＞CK，且差异显著，其中T5比CK增产61.1%。在4个滴灌处理中，T5处理经济收益最高。说明一管五行滴灌模式最有利于冬小麦花后光合作用及高产高效。

英文摘要:

To investigate the effects of drip irrigation lateral placements on photosynthetic performance of flag leaf after anthesis and yield of winter wheat,a field experiment were conducted using wheat cultivar Qingmai 7 with four drip irrigation treatments of 3 rows per lateral (T3),4 rows per lateral (T4),5 rows per lateral (T5) and 6 rows per lateral,using no irrigation as control CK ) under the same irrigation quota (1 800 m·hm^-2) at experimental station of Qingdao University in the year of 2011-2012. The results showed that,the SPAD value and leaf area index (LAI) of CK were significantly lower than that of drip irrigation treatments. The SPAD value and LAI of T5 were the highest among the drip irrigation treatments. Compared with CK,the net photosynthesis rate (Pn),transpiration rate (Tr) and stomatal conductance (Gs) of winter wheat flag leaf under drip irrigation were increased,the intercellular CO₂ concentration (Ci) was reduced. There was difference among the four drip irrigation treatments on photosynthetic of winter wheat after anthesis. In the early period of grain filling,the Pn,Gs and Ci values of different drip irrigation treatments was in the order T5＞T4＞T6＞T3,and in the late grain filling,the result was as T5＞T4＞T3＞T6. The Pn of T5 at 6 days after anthesis reached the maximum,which was 23.9%,13.4%,4.4% and 9.3% higher than that of CK,T3,T4 and T6,respectively. The grain yield and irrigation benefit of T5 reached maximum with grain yield of 8878.3 kg·hm^-2 and irrigation benefit of 5 845 yuan·hm^-2,significant difference were observed among different treatments in grain yield,the yield of T5 was increased by 61.1% than that of CK. So the photosynthesis and grain yield of winter wheat could be enhanced by 5 rows per lateral.

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