| Cite this article: | 雷媛,刘战东,张伟强,等.不同灌溉控制指标对冬小麦生长及耗水特性的影响[J].灌溉排水学报,0,():-. |
| LEI Yuan,LIU ZhanDong,ZHANG WeiQiang,et al.不同灌溉控制指标对冬小麦生长及耗水特性的影响[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Effects of different irrigation control indexes on growth and water consumption characteristics of winter wheat |
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LEI Yuan1, LIU ZhanDong1, ZHANG WeiQiang2, HUANG Chao1, DUAN AiWang1, LOU He3, LIU Zugui1
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1.Farmland Irrigation Research Institute,Chinese Academy of Agricultural Science/Ministry of Agriculture Key Laboratory of Crop Water Requirement and Regulation,Xinxiang;2.Henan Institute of Science and Technology for Development,Zhengzhou;3.Henan weisheng electric appliance co LTD,Xinxiang
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| Abstract: |
| Abstract:【Objective】To clarify the effects of different planned wet layer depths and lower control limits of soil water content on the growth and development, yield and water consumption of winter wheat, so as to provide a theoretical basis for field water management and automatic irrigation control decisions. 【Method】Taking winter wheat as the research object, through field experiments, set 3 levels of soil water content control lower limit index (L, 40%; M, 50%; H, 60%)and 3 levels of the planned wet layer depth（Determined by the percentage of available water content in the soil ）(60 cm; 80 cm; 100 cm), a total of 9 treatments with two factors (T60L; T60M; T60H; T80L; T80M; T80H; T100L; T100M; T100H), to study the main effects of the depth of the wet layer and the lower limit of soil water content and their interaction effects on the growth and development and water use of winter wheat in North China.【Result】The different depth of planned wetting layer and the lower limit of soil water content control changed the irrigation quota and irrigation times. Excessively high planned wetting depth or excessively low control limit of soil moisture content are not conducive to the growth and development of winter wheat plants. With the increase of planned wetting depth（60~100 cm） and the lower limit of soil moisture content（40%~60%）, the dry matter accumulation before and after flowering of winter wheat showed a tendency of first increasing and then decreasing. The lower limit of soil water content control increased, and the yield showed an increasing trend. When the planned wet layer depth was 80 cm, the yield was relatively highest. The higher the lower limit of soil water content control, the more water consumption. When the depth of the planned wet layer is 80 cm, the water consumption is the highest, and when the depth is 60 cm, the water consumption is the least. The maximum water use efficiency of T60H among the 9 treatments was 19.96 kg/（hm2?mm）, which was 21.0% higher than the minimum value T100L.【Conclusion】Under these experimental conditions ,when the depth of the planned wet layer is 60 cm and the lower limit of soil water content control is set to 60% of the effective soil water content, the results of water saving and high production are relatively optimal in the study area. |
| Key words: Winter wheat; Dry matter; Planned wetting depth; Lower limit of soil water content control; Yield |
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