The Research On The Effect Mechanism On The Field’s Sediment Infiltration Rule Under The Different Irrigation Quota In The Shandong Yellow River Irrigation Area

In order to deal with the Yellow River Delta the crisis of water resources, rational use of resources of sediment of the Yellow River, the better to study local area efficient agricultural water-saving mode, this experiment were Shandong Yellow River irrigation area of different irrigation quota on field sediment infiltration mechanism research on the impact of rules. Test in November 2014 to 2015 march in Dongying City Kenli County, Haixi village of Yellow River Beach plots, four irrigation treatments: irrigation quota in order to 750 m3 / hm2, 900 m3 / hm2, 1050 m3/ hm2, 1200 m3 / hm2. Compared with different sediment into the depth of infiltration,the soil layer soil particle size distribution and change of farmland soil moisture, find irrigation sediment infiltration law, in order to make full use of the resources of sediment of the Yellow River, water saving irrigation, rational allocation of water and sediment resources provide scientific basis. The results show that:Sediment depth of infiltration of different irrigation quotas: a large amount of sediment of the Yellow River water, to 750 m3 / hm2 irrigation quota irrigation, field sediment into the infiltration depth of 20cm; to 900 m3 / hm2 irrigation quota irrigation, field sediment into the infiltration depth of 30cm; 1050 m3 / hm2 irrigation quota irrigation, field sediment into the infiltration depth of 40cm; to 1200 m3 / hm2 irrigation quota irrigation, field sediment into the infiltration depth of 50 cm.Effect of soil texture for different irrigation quota: sediment of the Yellow River mainly to small micro particles, fine silt, clay ratio was significantly higher than that of field soil, coarse powder proportion far below the soil. The sediment infiltration,the soil fine silt, clay ratio increased, coarse silt ratio decreased significantly. The same level of soil, irrigation quota is greater, the soil particle size distribution changes more; the same irrigation quota, effect of soil particle size distribution decreases with the depth of soil, until the sediment no longer infiltration. The graded curve of soilparticles after irrigation is slow compared with that before irrigation, and the soil particle size distribution becomes larger and the size of soil particle size gap becomes larger and gradation tends to be good.. The soil structure of the soil is more reasonable and more suitable for cultivation and crop growth..Test under different irrigation conditions, different levels of soil particle gradation percentage, has drawn out four treatments under the soil particle size distribution curve and visually demonstrate different irrigation quota of each layer of soil particle composition changes. Through these test data can be under different irrigation conditions and for different levels of soil, according to the needs of tillage and crop growth, by soil method with the doped into different amounts and different types of soil particle, directly and effectively change soil particle composition, to improve soil aeration, water holding insurance fertilizer, the suitability of farming,which is, there are changes in soil texture composition to provide a scientific basis.Different irrigation quota of farmland soil moisture effects: muddy water irrigation of farmland soil moisture rate has changed a lot compared with before irrigation, are far higher than that of the irrigation before. The same level of soil, the greater the irrigation quota, the greater the amount of sediment infiltration, the soil moisture content will also increase. Lead sediment infiltration of soil particles,improve soil texture, increased soil water retention and entropy preservation performance.To sum up : muddy water irrigation on Irrigation Soil texture produced great influence, infiltration of sediment to the Yellow River sediment resources waste to treasure, change of soil particles, improve the properties of soil tillage. Study on the mechanism of different irrigation quota to the infiltration law of the soil in the field,so as to provide the scientific basis for the reasonable utilization of the sediment resources and water-saving irrigation. Research results and efficient allocation of water and sediment resources of water-saving irrigation technology and combination is worth of in-depth study and popularizing in Shandong Yellow River irrigation area.