| Cite this article: | 武亚梅,朱金铤,朱德兰,等.基于Meta分析的中国灌溉冬小麦产量及水分利用效率影响因素研究[J].灌溉排水学报,0,():-. |
| WU Yamei,zhu jin tin,ZHU Delan,et al.基于Meta分析的中国灌溉冬小麦产量及水分利用效率影响因素研究[J].灌溉排水学报,0,():-. |
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| Meta-analysis on Influencing Factorsimpact of Irrigateding on winter wheat Yield and Water Use Efficiency in China |
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WU Yamei1, zhu jin tin2,3, ZHU Delan1, LI Dan1
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1.Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas,Ministry of Education,Northwest A F University;2.Qinghai Research Institute of Water Conservancy &3.Hydro-Electric Power
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| Abstract: |
| 【Objective】At present, most of the studies on the factors affecting the yield and water use efficiency of irrigated winter wheat are concentrated in a particular area, and the results of the study are scattered. Considering above problems, this paper reveals the influencing factors of yield and water use efficiency of irrigated winter wheat at macro scale.【Method】Based on the published data of field experiments, We obtained the effects of irrigation on yield and water use in different areas by using meta analysis method, and on the basis of heterogeneity test, the effects of irrigation quota, rainfall and average temperature on winter wheat yield and water use efficiency were investigated by meta subgroup analysis.【Result】Compared with non-irrigated winter wheat during growth period, Irrigation increased winter wheat yield by 39.34% and water use efficiency increased by 3.39%. The yield increased with the increasing of irrigation quota, and the increase tends to stabilize gradually, but the effect of water use efficiency increases firstly and then decreases with the increasing of irrigation quota. When the irrigation quota was increased to ＞240mm, the change rate of relative water use efficiency (WUE) of winter wheat was decreased to-11.29%. With the increasing of the average temperature during the growing period, the yield-increasing effect of irrigated winter wheat was significantly increased. The yield of winter wheat increased by 45.81% when the average temperature of the growing period was higher than 9 ℃. The rainfall in the growing period had a significant effect on the yield of irrigated winter wheat, and the effect of irrigation yield was most prominent when the rainfall type in the growing period was dry year with yield increase rate 72.48%. 【Conclusion】 The irrigation quota of 60~120mm is more favorable to increase yield and water use efficiency of winter wheat. The study results can be used as reference for timely and appropriate field irrigation for different rainfall years. |
| Key words: winter wheat; yield; water use efficiency; Meta-analysis; irrigation quota; meteorological factor |
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