Effects of Drought Stress on Roots Growth and Nutrient Metabolism of Winter Wheat

doi:10.3321/j.issn:1000-7091.2000.02.013

Abstract

Abstract: The effect of roots growth and nutrient metabolism of winter wheat was studied under different degree of soil sustaining drought. It showed that under the drought stress condition the secondary roots develop slowly, the amount of those decreased, roots wereharden, root tip shrink back. Rooting ability was effected badly in jointing-flowering stage. The roots dry matter accumulation also declined, the peak appearance was delayed. The total accumulation of N and P decreased. The distribution ratio of accumulation declined at the early and middle stages, then rises after flowering. More N and P stayed in the roots at the late stage, less was transported outward, and to lose more above middle degree drought stress. The content of total soluble-sugar decreased, and the ratio of C to N is disorder. The content of soil water which maintain the roots uptake and transport N,P well and form the appropriate ration of C to N can't be less than 60% percent.

Key words: Drought stress, Winter wheat, Root system, Growth, Nutrient metabolism

CLC Number:

S512.101

ZHOU Sumei, MA Yuanxi, WANG Chenyang, WANG Huacen, LU Fengrong. Effects of Drought Stress on Roots Growth and Nutrient Metabolism of Winter Wheat[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2000, 15(2): 57-62. doi: 10.3321/j.issn:1000-7091.2000.02.013.

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