EFFECTS OF STAGE DROUGHT AND RE-WATERING ON PHOTOSYNTHESIS, ROOT SHOOT RATIO AND WATER USE EFFICIENCY OF SUMMER MAIZE (Zea mays L.)

文献类型： 外文期刊

第一作者： LI, Y. B.

作者： LI, Y. B.;WANG, X.;ZHU, Y. N.;Li, D. X.;Gao, Y.

作者机构：

关键词： drought stress; rewater; biomass measurement; physiological measurement; water consumption

期刊名称：APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH （ 影响因子：0.711； 五年影响因子：0.796 ）

ISSN： 1589-1623

年卷期： 2020 年 18 卷 6 期

页码：

收录情况： SCI

摘要： Field experiments were carried out to evaluate the effect of levels water stress and re-watering the growth characteristics and water use efficiency of summer maize (Zea mays L.) at different growth stages. The experiment included 3 water stress treatments at jointing-tasseling and flowering-filling stages, full water supply was set as a reference. The photosynthesis, dry matter accumulation, yield and water use efficiency were compared and analyzed under different drought and re-watering conditions. Results showed that the inhibition of photosynthesis not only occurred under of water stress, but also existed after re-watering. The degree of inhibition was related to both the degree of water stress and the growing stage. Meanwhile the degree of water stress and the growing stage were closely related to the stomatal restriction inhibiting the photosynthesis. The effects of moisture variation on dry matter distribution between root and cap were distinctive at different growing stages. The yield of maize did not significantly differ between the Treatment1, Treatment4 and control treatments, while the water utilization efficiency of Treatment1 and Treatment4 was higher that of the control check. Therefore, reasonable water stress not only ensures yield, saves irrigation water, but also effectively improve water use efficiency.

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