Research Of Under Membrane Line Drip Irrigation Soil Moist Area Influencing Factor

For drip irrigation under plastic film, moist soil of a direct impact on the crop for moisture absorption and the impact on the soil moist areas of the main factors that emitter traffic, irrigation, soil texture and covered the role. Based on the test on the basis of sand, loam and light in the loam soil moist areas of the main factors were studied at the same time the source of these factors on the impact of uniformity of drip irrigation, soil testing process of observation, vertical moist wetting front shift, moist body shape, density, field indicators, such as water retention rate. Analysis emitter flow, volume of water dripping, soil type and Coated impacted the Soil moist areas.Tests showed that the soil moist front of the migration of moist soil and humid uniformity has been affected by emitter traffic, irrigation, soil texture, depth of drip irrigation covered in the shape of moist soil.Under the same conditions of irrigation, water moist and humid front shape of the campaign is different in different texture of the soil. It mainly because of the physical indicators of different soil caused by the wet sand in the shape narrow and deep, soil moisture is down movement, vertical wetting front migration from greater than the level of migration from and moist loam in the shape of wide and shallow, soil moisture level of movement than vertical movement evident and the level of migration greater than the vertical moist shift distance; light loam between the shape of the wet sand and loam in between.The impact of emitter flow to moist soil was big, the emitter flow affected moist soil to the level of migration from big to small are: mediu loam, light loam, sandy soil; and the impact to vertical transport of moist soil from big to small is contrary. When emitter flowgreater ,the uniformity of moist sandy soil and light loam are all greater, but the moist of medium loam uniformity is smaller.The volum of irrigation is the main factor that impacted the moist soil, the greater volume of water the bigger of the moist soil, and the higher degree of soil moist.Covered with a film of moist soil is different. With film, moist soil in smaller film roles is to stop the movement of water level, speed up the downward movement of water, covered in moist soil after the film than the level of non-migration from small and large vertical distance migration; different depth covered under the conditions of soil moisture are also different in shape, covered the deep water of the film on the blocking is the greater depth of moist soil; covered soil Humid uniformity has improved.