华北农学报 ›› 2010, Vol. 25 ›› Issue (4): 145-151. doi: 10.7668/hbnxb.2010.04.031

所属专题: 小麦 抗旱节水

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限量补灌对旱地冬小麦灌浆期旗叶光响应及产量的影响

谭念童, 林琪, 李玲燕, 刘义国, 张玉梅   

  1. 青岛农业大学旱作技术重点实验室, 山东青岛 266109
  • 收稿日期:2010-05-21 出版日期:2010-08-28
  • 通讯作者: 林琪(1957- ),男,山东乳山人,教授,博士,主要从事作物高产栽培理论与技术研究。
  • 作者简介:谭念童(1984- ),男,山东潍坊人,硕士,主要从事旱地小麦高产生理生态方面的研究.
  • 基金资助:
    国家自然科学基金(30871484);国家粮食丰产科技工程(2006BAD02A09-JS03);山东省作物栽培与育种学"泰山学者"基金项目岗位基金;公益性行业科研专项基金(200903007-03);农业科技成果转化资金(2008GB2C600169)

Effects of Limited Irrigation on Light-response of Flag Leaves and Grain Yield in Dry-land Winter Wheat at Filling Stage

TAN Nian-tong, LIN Qi, LI Ling-yan, LIU Yi-guo, ZHANG Yu-mei   

  1. Key Laboratory of Dry-land Farming of Qingdao Agricultural University, Qingdao 266109, China
  • Received:2010-05-21 Published:2010-08-28

摘要: 在大田条件下,以青麦6号为试验材料,研究了5个灌水处理下旱地冬小麦灌浆期旗叶的光合参数、水分利用效率和产量的变化.采用开放式气路测定了小麦旗叶的净光合速率、气孔导度、胞间二氧化碳浓度、蒸腾速率等相关指标,并通过非直角双曲线模型对小麦旗叶的净光合速率进行模拟,得出了旗叶光响应曲线的特征参数.结果表明,在补灌小于两水的情况下,旗叶的净光合速率、气孔导度、蒸腾速率都随着补灌量的增加呈上升趋势,均以拔节水60 mm+灌浆水60 mm(W3)的处理最高,而胞间CO2浓度、水分利用效率随着补灌量的增加呈下降趋势;而在补灌三水的情况下,在拔节水60 mm+孕穗水60 mm+灌浆水60 mm(W4)的处理的净光合速率、气孔导度都明显小于补灌一水和两水的处理,而胞间CO2浓度、蒸腾速率却明显大于补灌一水和两水的处理,同时水分利用效率也是所有处理中最低的,表明过量的补灌对旱地小麦灌浆期旗叶的光合作用有消极作用.产量虽然以W3处理的产量为最高,但是除去对照处理,其他4个处理之间产量差异不显著.综合考虑产量、水分利用效率等因素,以拔节水60 mm(W1)的处理为达到旱地冬小麦高产的最佳补灌模式.

关键词: 限量补灌, 旱地小麦, 光响应, 产量

Abstract: In field experiment,the effect of five irrigation treatments on the change of flag leaf photosynthetic parameters ,water use efficiency and grain yield in kernel filling stage of dry land winter wheat is studied with Qingmai 6. Net photosynthetic rate (Pn) ,stomatal conductance (Gs) ,intercellular CO2 concentration (Ci) and transpiration rate (Tr) in flag leaves of super-high yielding winter wheat were measured in an open-circuit gas channel system,moreover,Pn of winter wheat flag leaf is simulated in nonrectangular hyperbolic model and the characteristic parameter of light response is obtained. The results showed that Pn,Gs and Tr were on the rise with the twice supplementing irrigations and less twice supplementing irrigations,the highest one of which was treatment W3(Jointing 60 mm + Filling 60 mm) ,but Ci and water use efficiency(WUE) had decreasing tendency with supplementing irrigation; But Pn and Gs of treatment W4(Jointing 60 mm + Booting 60 mm + Filling 60 mm) were less than that less twice supplementing irrigations,Ci,Tr were higher than that else treatments obviously,and WUE is the least all of treatments, which indicated that over supplementing irrigation has negative influence on photosynthesis of flag leaves in dry-land winter wheat at filling stage. The grain yield of the treatment W3 is the highest ,but there were no significant difference among the other four treatments except the CK. Considering the grain yield,water use efficiency and other factors, the treatment W1(jointing irrigation irrigation 60 mm) is the best supplementing irrigation model in dry land winter wheat and high-yield cultivation.

Key words: Limited irrigation, Dry-land wheat, Light-response, Yield

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引用本文

谭念童, 林琪, 李玲燕, 刘义国, 张玉梅. 限量补灌对旱地冬小麦灌浆期旗叶光响应及产量的影响[J]. 华北农学报, 2010, 25(4): 145-151. doi: 10.7668/hbnxb.2010.04.031.

TAN Nian-tong, LIN Qi, LI Ling-yan, LIU Yi-guo, ZHANG Yu-mei. Effects of Limited Irrigation on Light-response of Flag Leaves and Grain Yield in Dry-land Winter Wheat at Filling Stage[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2010, 25(4): 145-151. doi: 10.7668/hbnxb.2010.04.031.

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