Young Forest Flood Irrigation Analyzed Under The Condition Of Water Transport Rule Experimental Study

At present about flood irrigation red jujube irrigation law and irrigation systemstudy is less，the experimental results is Flood irrigation irrigation methods，throughthe experiment，got Flood irrigation soil moisture variation rules and the irrigationsystem. Draw the following main conclusions:(1) Flood irrigation compared under the condition of different soil moist modelfitting the dynamic changes of the front，think two polynomial model fitting degree isgood，these models for design Flood irrigation system，including water and irrigationwater and provide historical reference；At the same time for the revelation of theFlood irrigation conditions in soil nutrient migration characteristic，also have certainsignificance.(2) Flood irrigation conditions of moist soil body size，wet feng in advance ofrate，mainly by soil characteristics and the effect of irrigation water. In this fieldexperiment of sand soil conditions，the moist feng radial speed in vertical speed nomuch difference，mobile process distribution form is linear diffusion. Compared withdrip，drip irrigation of the moist soil body shape is to the right sector head drop. Theflow，Flood irrigation than drip irrigation，infiltration time is short，irrigation time isshorter easy generation deep seepage.(3) in the stop after water supply of soil water dynamic change special complexin the different soil depth is not a single water absorption process or dehydrationprocess，but in a short time can complete the water absorption process anddehydration process，therefore，need to consider in the water in the dynamicsimulation lagged effect，to establish and perfect the more practical model.(4) in time，the water treatment of different depth change have to delay thetrend，with irrigation water reduction，the same level of depth between treatment ofsoil water cut change a delay，in the earth’s surface is100～120cm soil moisturecontent in all basic same，soil moisture content not change significantly. After thewater，in the surface of0～40cm and about60～80㎝deep soil layer of soilmoisture change is violent，is SuBian layer of soil moisture. (5) in space，after water，earth’s surface in0～20cm，20to40㎝and60～80㎝deep soil layer of soil moisture change is violent，is SuBian layer of soilmoisture. In the surface in20cm0～changes the fastest，and the most significantchanges in the surface40to60cm and100～120cm in the basic same，soil moisturecontent not change significantly.