数字农科院2.0

Effects Of Supplemental Irrigation Based O.n Soil Moisture Levels O n Photosynthesis, Dry Matter Accumulation, And Remobilization In Winter Wheat (Triticum Aestivum L.) Cultivars

文献类型： 外文期刊

作者： Zhang, Yongli;Zhao, Junye;Zhao, Junye;Yu, Zhenwen;Meng, Weiwei;Meng, Weiwei;Shi, Yu

作者机构：

关键词： Winter wheat cultivars; supplemental irrigation based on soil moisture; photosynthesis; dry matter accumulation; remobilization

期刊名称： PLANT PRODUCTION SCIENCE

ISSN： 1343-943X

年卷期： 2017 年 20 卷 2 期

页码：

摘要： Two winter wheat (Triticum aestivum L.) cultivars, namely Jimai22 (JM22) and Zhouyuan9369 (ZY9369), were used to study the effects of a new irrigation policy, supplemental irrigation (SI) based on soil moisture levels, photosynthesis, dry matter accumulation, and remobilization from 2009 to 2011 in Northern China. Two SI treatments were designed based on relative soil moisture contents in the 0-140cm soil layer: (1) the target soil relative water contents were 75% of field capacity (FC) at jointing and 65% of FC at anthesis (W1), 75% and 70% (W2) in 2009-2010, and (2) the target soil relative water contents were 75% at jointing and 75% at anthesis (W1), 75% and 80% (W2) in 2010-2011. Rain-fed treatment (W0) was used as control. Results showed that SI significantly improved the biomass, grain yield and water use efficiency (WUE) of both wheat cultivars. The biomass and grain yield of W1 and W1' treatments were higher than those of others. The net photosynthetic rate, the actual photochemical efficiency of flag leaf, the accumulation of dry matter, and its remobilization from the vegetative parts to the grains after anthesis in W1 and W1' treatments were significantly higher than in the other treatments. By contrast, the WUE and irrigation efficiency of W2 and W2' were significantly lower than those of W1 and W1'. Under the experimental conditions, JM22' showed higher photosynthetic rate in the last stage of grain filling, more spike number per ha, more kernels per spike, higher 1000-kernels weight and eventually higher WUE than ZY9369'.

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