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Title:: Effects of Irrigation Amount Under Film-mulched Irrgation on Growth Dynamics，Yield and Water Use Efficiency of Greenhouse Tomato

Author(s):: FAN Fengcui1; 2; LIU Shengyao2; JIA Songnan2; LI Zhihong2; SHI Yufang2; ZHANG Lifeng3; (1.Horticulture College，Hebei Agricultural University，Baoding，Hebei 071001；2.Agricultural Information and Economic Research Institute，Hebei Academy of Agriculture and Forestry Sciences，Shijiazhuang，Hebei 050051；3.Agricultural College，Hebei Agricultural University，Baoding，Hebei 071001)

Keywords:: greenhouse tomato; water saving irrigation; irrigation amount; growth dynamics

Abstract:: In order to study the effect of irrigation amount on growth，yield and water use efficiency and to provide reference for reasonable irrigation of greenhouse tomato，a field experiment was conducted on greenhouse tomato.Single irrigation volume was 75 m3·hm-2，150 m3·hm-2，225 m3·hm-2，300 m3·hm-2 and 375 m3·hm-2，respectively.The results showed that the water treatment could influence different growth indicators in different stages.The stage of water shortage limitation effect of plant height，Fv/Fm and photosynthetic rate were presented at full fruit period for large water requirement.After entering the harvesting period a fluorescence reaction appeared and the number of leaves appeared before the fifth fruit set to the pinching.Irrigation volume and yield，and water consumption of vegetable fields were conical relationship.The yield decreased significantly when irrigation volume was below 75 m3·hm-2，which was lower than the control 26.72%.The water use efficiency increased significantly as water irrigation decreased，which was 16.19%-121.62% higher than that of the control.In this study，based on comprehensive consideration of growth，yield and water use efficiency，suitable irrigation amount under film-mulched irrgation was 930-1 230 m3·hm-2 for greenhouse tomato growth during autumn-winter season.