Effects Of Different Irrigation Systems On Growth Characteristics,Yield And Water And Nitrogen Utilization Of Cucumber In Greenhouse

As the decreasing day by day of water resources and the shortage of land resource in North Henan plain area.How to get a good harvest in the limited water resources and land resources is an urgent problem to be solved in agricultural production.Limited water resources and land resources of the dual bottleneck,greenhouse cultivation technology came into being.As the main vegetable grown in the greenhouse,cucumber need more water to grow up,therefore,cucumber saving water has important significance.In order to improve the utilization ratio of irrigation water and to select the suitable irrigation system,in this experiment,"Jin you No.1" cucumbers as tested materials.Using the single factor variable,the irrigation system is variable,a field experiment was carried out in the greenhouse,in the study of the irrigation quota under certain circumstances,effects of different irrigation systems on growth,physiological characteristics and utilization of water and nitrogen in autumn cucumber in greenhouse.In order to select the appropriate irrigation system for greenhouse cucumber in autumn,thus saving and labor-saving,time-saving.Test results show that:(1)The absorption of water in autumn cucumber is mainly concentrated in the underground 0~25cm.Under different irrigation systems.The cucumber plants were treated with T3(that is,once every 3 days)and the water use efficiency was good.T5 and T7 treatment of an excessive amount of irrigation is prone to surface water,resulting in reduced irrigation water use efficiency.(2)From the different growth period of the measured content of nitrate nitrogen in soil,the content of nitrate nitrogen in the soil under the irrigation was changed greatly.The difference between each treatment is relatively large,in the same area,the difference of nitrate content in the soil between the two drip irrigation pipes with the change of the depth varies.Change is not very big,and all of the changes are mainly concentrated in the depth of 0~30cm.(3)From the growth process of different growth period of Autumn Cucumber,under the condition of the irrigation quota and the total amount of fertilizer,from the point of view of the results of the treatment of different drip irrigation systems,the effects of irrigation on the height,root diameter,leaf chlorophyll content,leaf fresh weight and leaf dry weight of Autumn Cucumber in greenhouse were significant in 3 days.The growth of stem diameter,leaf number and leaf area were significantly influenced by irrigation at one time every 5 days.(4)From the view of the final fruit,the effect of irrigation on the length of single fruit,the diameter of single melon,the number of fruit and the final yield was significantly affected by irrigation at every 3 days.And the irrigation system yield and water utilization efficiency compared with the other treatments also reached a maximum,respectively 29505.02 kg / hm~2 ?24.45 kg / m~3,the irrigation system of water-saving,fertilizer saving and labor saving.