| In this paper,the xishan orchards in yukou village of qixian county were used as the experimental site for the study of soil moisture movement in hilly and mountainous areas.Yukou is one of the earliest areas to develop fruit trees in our country.Apples are of good quality,so the fruit research institute of shanxi academy of agricultural sciences is located nearby.Located in the southeast of qixian county,yukou township is a typical hilly area.The apple industry is the pillar industry in this area,but the water resources in this area are relatively scarce,resulting in low yield,so it is urgent to introduce water-saving irrigation technology.Drip and infiltrating irrigation can save a lot of water resources,protect soil structure,improve water use efficiency,and improve soil structure,so as to improve apple yield.In order to study the rule of soil moisture movement in the process of the drip and infiltrating irrigation,this article adopts the method of simulation experiment,around the colorless transparent glass box,filled them with the soil of yukou area,using dropper simulation experiment get moisture in the soil infiltration distance over time,insert four aluminum tubes,measuring the count by LNW-50 C neutron soil moisture instrument,obtaining the soil moisture content by formula conversion.In this paper,the relationship between moist peak moving distance,water moving speed,soil moisture content and time was studied,and effects of different time,depth,drop head flow and irrigation amount on soil moisture content and the regular of wet object was studied.The main results obtained are as follows:(1)Under the drip irrigation,the change curve of relative cardinal rate over time is approximate to the exponential function.Under the infiltrating irrigation,the change curve of relative cardinal rate over time is approximate to the power function.(2)The curve of soil volumetric moisture content changing with time,depth and drop head flow under drip and infiltrating irrigation is approximate to a power function,and the correlation coefficient tested by regression analysis is better.(3)After the water into the soil,the moving process under the way of drip and infiltrating irrigation is divided into two phases,and the first phase is constant speed of mobile phase,and the second phase is inonuniform phase,and under drip and infiltrating irrigation method,the moist peak of drip irrigation is semicircle and half oval to diffuse,but the water moist of infiltrating irrigation is roundness and ovoid to spread.(4)Under drip and infiltrating irrigation,the movement speed of water in soil gradually slows down with time.(5)Under drip and infiltrating irrigation,the shape and volume of wet object are related to the drop head flow and irrigation amount Under drip and infiltrating irrigation modes,the overall relationship between the volume of the wet object and time was linear under different drip rates.The volume of the wet object increased with the increase of the drop head flow.At the same time,the volume of wet object under infiltration irrigation was about 1.5 times bigger than that under drip irrigation,because the water percolated upwards under infiltration irrigation.(6)Under drip and infiltration irrigation,after the irrigation stopped for 24 h,the infiltration distance and volume of the moist peak both increased,and the moving speed of the moist peak increased with the increase of the flow rate.In the case of infiltration irrigation,the upper seepage distance changes little,which is due to the influence of gravity.(7)Under drip and infiltration irrigation,the soil volumetric water content has been decreasing for 24 h and the relative reduction rate under infiltration irrigation is small.After the irrigation stopped for 24 h,the soil volumetric water content is almost unchanged,and then enters the evaporation stage,which will remain for a period of time. |
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