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[1]NI Panpan,ZHU Yuanjun,CUI Yaqiang.Effects of Rainfall Change on Leaf Morphology and Biomass of Winter Wheat in the Loess Tableland[J].Research of Soil and Water Conservation,2016,23(06):116-121.

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Effects of Rainfall Change on Leaf Morphology and Biomass of Winter Wheat in the Loess Tableland

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 23 Number of periods: 2016 06 Page number: 116-121 Column: Public date: 2016-12-28

Title:: Effects of Rainfall Change on Leaf Morphology and Biomass of Winter Wheat in the Loess Tableland

Author(s):: NI Panpan^1,3, ZHU Yuanjun^1,2, CUI Yaqiang²; 1. Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling, Shaanxi 712100, China;
2. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A & F University, Yangling, Shaanxi 712100, China;
3. University of Chinese Academy of Sciences, Beijing 100049, China

Keywords:: rainfall change; leaf morphology; biomass; winter wheat; loess tableland

CLC:: S512.1⁺1;Q948

DOI:: -

Abstract:: Determining the effects of rainfall change on winter wheat leaf morphology and biomass can help understand the responses of winter wheat morphology and yield to water environment change in the loess tableland. We took a real-time rainfall control technique composing of artificial rainfall-shields and gravitational trickle irrigation system to investigate the effects of three rainfall treatments such as normal rainfall (CK), rainfall reducing 1/3 (R_-1/3), and rainfall increasing 1/3 (R_+1/3) on leaf morphology, biomass and stem length of winter wheat in the different growth periods in the loess tableland. The results indicated that the leaf length relatively changed more and the leaf area increased in the treatment of R_+1/3. While in the treatment of R_-1/3, the leaf width relatively changed more and the leaf area decreased. The leaf shape index[(leaf length×leaf maximum width)/leaf area] was hardly affected by rainfall change and yet mainly depended on the growth period of winter wheat. In the treatment of R_+1/3, winter wheat leaves, biomass and stem length all kept stable growth superiority in the whole growth period. While in the treatment of R_-1/3, they were all promoted in the beginning period and restrained in the later period. Winter wheat biomass and leaf area were positively linearly correlated under different rainfall conditions. Winter wheat biomass was the most sensitive to the changes of leaf area in the treatment of R_-1/3. Generally, winter wheat can change its leaf shape, leaf area and growth speed to affect photosynthate accumulation and yield so as to adapt different water environments in the loess tableland.

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