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Acta Agron Sin ›› 2006, Vol. 32 ›› Issue (03): 410-414.

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Effect of Irrigation Times on the Photosynthetic Charcteristics of Flag Leaf and Grain Yield in Wheat Hybrid Ji’ai 1/ C6-38

ZHANG Yong-Li;XIAO Kai and LI Yan-Ming   

  1. College of Agronomy, Hebei Agricultural University, Baoding 071001, Hebei
  • Received:2005-01-20 Revised:1900-01-01 Online:2006-03-12 Published:2006-03-12

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Abstract:

A field experiment with three treatments of different irrigation times at different stage was conducted during wheat growing period. The results showed that with the increase of irrigation times, the net photosynthetic rate (Pn), chlorophyll concentration (Chl), soluble protein contents (Pr), stomatal gas conductance (gs), mesophyll gas conductance (gm), relative steady phase of chlorophyll content(RSP), photosynthetic active duration(PAD) and leaf source capacity(LSC) of flag leaf were increased in wheat hybrid and its parents, and the grain yield and yield components in creased also. The Pn, Chl, Pr, gs and gm of flag leaf in hybrid were more sensitive to the times of irrigation than that in its parents at different stages after flag leaf was fully expanded. The heterosis from mid-parent(Hm) of all above traits were increased with the increase of the irrigation times.

Key words: Irrigation times, Wheat hybrid, Flag leaf, Photosynthetic characteristics, Grain yield

CLC Number: 

  • S512
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