Physiological Mechanism of Wheat Tillering and Earing under Different Accumulated Temperature in the Vegetative Growth Period

doi:10.3321/j.issn:1000-7091.1996.03.007

Abstract

Abstract: Studies on the growth of tillers and C,N,P metabolism indicated:1 The critical accumulated temperature for earing in the vegetative growth period was 250℃ in Bejing area,and the tillers tended to fail bellow 175℃.2.The tillering and earing as well as the characters of the ear were interlaced with C and N metabolism.Better N metabolism and sugar accumulation in tillers during the jointing stage favorably affected the tillering and earing as well as the characters of the ear.3.In the different groups of tillers,C metabolism went down from big tillers medium tillers to small tillers,while P metabolism in the rejuvenation stage went down from small tillers,medium tillers to big tillers,and vice versa after the jointing stage.The priority for P metabolism changed during the rejuvenation-jointing stage,earlier than that of N metabolism.

Key words: Wheat, Tiller, Accumulated temperature in the vegetative growth period

CLC Number:

S512.101

Zhao Changping, Guo Xiaowei, Zhang Fengting, Zhu Dehui, Li Hongxiang, Dong Keqin. Physiological Mechanism of Wheat Tillering and Earing under Different Accumulated Temperature in the Vegetative Growth Period[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1996, 11(3): 35-40. doi: 10.3321/j.issn:1000-7091.1996.03.007.

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