Effects of Drought on Distribution and Accumulation of Photosynthetic matter in Winter Wheat

doi:103969/jissn1000-6362201403002

Abstract

Abstract: The effects of drought treatments on dry matter distribution,soluble sugar content,yield and yield composition of winter wheat with 3 different relative soil moistures(80%,CK;60%,T2;40%,T1)were investigated by using large moving waterproof canopy to keep out of precipitation under field conditions in 2011-2013The results showed that dry matter accumulation in different organs and soluble sugar content varied along with the intensity and duration of drought treatments and wheat development stage Stem and sheath dry weight of T2 increased at early drought stage,and decreased from flowering stage Dry weight of leaf and root was lower than that of CK at whole drought treatments stage with the difference became smaller along wheat development, soluble sugar content in different organs was higher than that of CK Yield composition under drought stress showed higher infertility spikelet rate,lower spike and 1000 kernel weight Comparing with CK,dry weight of root,stem,leaf and sheath was decreased and yield composition of T1 was influenced significantly Dry matters in stem translocation amount and transportation rate were a little higher than other vegetative organs under drought treatments In conclusion,dry matter distribution pattern changed with drought treatments, soluble sugar content increased,dry matter transfer efficiency and the contribution rate from stem to the spike increased,which resulted in winter wheat aging early and yields decrease

Key words: Winter wheat, Photosynthetic matter, Drought treatments, Soluble sugar, Distribution pattern

HU Cheng da,YANG Guang xian,CHENG Lin. Effects of Drought on Distribution and Accumulation of Photosynthetic matter in Winter Wheat[J]. Chinese Journal of Agrometeorology, 2014, 35(03): 243-249.

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