Experimental Study On Water Saving Effect Under The Condition Of Wide Ridge And Furrow Irrigation

In this paper,the author,using the combination of methods by mean of studied the law of of soil evaporation between crop tree,the soil moisture dynamics and the soil water changes in different layers were planned,effects of straw mulching on water consumption and yield of summer maize,under the condition of wide ridge and furrow irrigation planting.The main results were as follows:(1)Based on field test data,the authors analyzed the relationship between soil evaporation and water consumption in different stages of crop growth,different irrigation control limits and the proportion of soil evaporation in different stages of crop growth,main environmental factors affecting soil evaporation,under the condition of wide ridge and furrow irrigation planting.And the relationship between soil evaporation and surface soil moisture content,leaf area index,and the change of soil evaporation intensity were established.The results show that the wide ridge and furrow irrigation can effectively reduce soil evaporation is invalid,which can produce obvious water-saving effect.The relationship between soil evaporation and soil moisture content and leaf area index was good.A few days after irrigation,in order to achieve the purpose of saving water to use less time and amount of irrigation way as much as possible.And reduce the surface soil moisture area and time,a few days before the rainfall and irrigation should take effective measures to inhibit the evaporation of soil.(2)Through the observation of dynamic changes of different irrigation methods of root layer soil moisture,the author reveals the variation of soil moisture of different irrigation methods and soil depth rate,soil water content curve established in different periods and different soil layers,and then find the law of water consumption of winter wheat and summer maize in different growth stages.The results showed that the maize soil moisture fluctuation is more frequently than the winter wheat,and the higher the anniversary of water treatment,the greater the soil moisture content.The soil moisture of 0 ~ 20 cm fluctuation frequency is large,and the fluctuation range is larger.With the deepening of soil layer,soil moisture fluctuation decreases.The water consumption of the two crops was the largest from jointing stage to filling stage,which accounted for about 45%~50% of water consumption in the whole growth period.Compared with the traditional irrigation mode,the irrigation water treatment to reduce water consumption of 38.15 mm ~ 44.13 mm,water use efficiency increased by 9.17% ~ 22.73%.Among them,the yield of L-70 treatment was higher,the water consumption was moderate,and the water production efficiency was the highest,with an average of 1.84 kg/m3 and 1.81 kg/m3.(3)The effects of 3 kinds of water treatments and 4 treatments,under the condition of wide ridge and furrow irrigation planting,on water consumption and yield of summer maize were studied.The results showed that straw mulching increased the yield of summer maize under the same water treatment.The yield of F2 treatment was the most significant,and the yield was 2.68%~4.58%.Seedling-Jointing mulching showed obvious moisture ability,compared with F0 treatment was the highest saving 8.32~9.81 mm.There was a lot of rainfall during jointing,male pumping and filling stage,and the right amount of straw mulching could enhance the infiltration of rainfall and the rainfall was more abundant.The overburden is too thick to block the infiltration of rainfall,so that precipitation in the overburden,and ultimately lead to a large number of ineffective water evaporation,F2 coverage is the most appropriate treatment.Combined with water treatment and cover treatment,L-70 water treatment and F2 coverage treatment effect is the best.The yield was as high as 7815.42 kg/hm2,the water consumption was only about mm,the water use efficiency was 2.13 kg/m3,and the precipitation efficiency was about kg/m3.