Study On Film Slit Furrow Irrigation Technology Of Summer Corn

Plastic cover is a major agricultural cultivation techniques progress,it can greatly improve the field micro-climate,with the protection of the soil structure,to cope with the wind,sand and water erosion,soil moisture and temperature regulation,inhibit the growth of weeds and soil to kill some pathogens,etc.Conducive to crop growth and development,to improve crop yields,improve agricultural efficiency.Based on the theory and experimental research through access to a large number of documents,and the characteristics of the membrane seam furrow irrigation,this article mainly researched the infiltration and flow characteristics of film silt furrow irrigation about loam, and researched reasonable irrigation system of summer corn at the conditions of a single species of small plot film slit furrow irrigation,and chose the right film sewing width and reasonable irrigation system,in the conditions of film slit furrow irrigation and furrow irrigation in open field cultivation,comparative analysis of the summer maize growth and development of the situation,and the physical production.1.Study the film silt furrow irrigation infiltration law according to the outdoor test device in the initial moisture content under the same conditions.The test data analysis showed that the curve of the infiltration time and film silt furrow irrigation and the cumulative amount of infiltration was in line with the test model ofА.Н.КОСТЯКОВ.The relative amount of cumulative infiltration was the smaller with the greater width of the slit film in the same time of infiltration corresponding to the unit area;The time of infiltration to achieve stability was the longer with the smaller the width of the slit film;Promote the level of the same distance, the amount of time spent with the width of the silt film;The width of the slit film was the smaller,the time required was the shorter;open field than the plastic film used for a long time. The curve of the horizontal distance and the time used the formula ofА.Н.КОСТЯКОВto fit. The relevance of the best was membrane seam width of 5cm and 10cm,with the current rate of advance of the discharge increased when a certain width of membrane seam.2.According to of the silt film furrow irrigation in different irrigation system,researched the conditions of growth and development,yields and cost-effectiveness of the summer corn, showed that the water,crop growth,development and production was not consistent.Plastic cover crops in the seedling stage of the warming effect of soil moisture was the most obvious Water use efficiency was different with different conditions,it was highest that the irrigation system was irrigation 3 times and irrigation norm 2700m~3/hm~2,the corresponding coefficient of water was also small,water-saving relative,and to identify specific time for irrigation.3.Choice of the silt film width of 5cm,single-wide flow of 2.0L/(s.m),using the irrigation system of water 3 times,irrigation norm 2700m~3/hm~2,researched the summer corn in the conditions of film slit furrow irrigation and furrow irrigation in open field cultivation, from the soil temperature,soil moisture,leaf area index and dry matter accumulation,etc. based on the above experiment data showed that:(1) At different times along the farm-ground temperature changes in the depth of the relationship was different;It was inconsistency that in the farming-day temperature changes in the performance of the maximum temperature for the time and temperature to a maximum time;The summer corn of the silt film furrow irrigation during growth period,increased warming effect of was gradually reduced;With the deepening of the soil,covering the soil temperature was getting smaller and smaller role in the regulation;After the film the soil temperature changes was small in the rate of corn root system,conducive to absorb more moisture and nutrients to promote growth and development of com.(2) Coated in a certain period of time than the open field of soil moisture appeared to be relatively stable water conditions,different growth stages of soil moisture changed range was different of the soil moisture content in the whole growth period,the changes was the biggest in the seedling stage,the growth period in the latter part of the soil changes was little in the moisture content.(3) Leaf area index in line with the general trend of changes was with the laws of biology crops.From the milky stage to mature,corn plastic film group to show a better protection of green leaf area index remained at 3.0 above,which prevented light leakage and speed was very good for grain filling.(4) In the reproductive period,dry matter accumulation of summer corn by the slow pace of change fast and then slow;film and the open field compared to the third stage,film grain growth rate significantly higher in the open field,further film was better than furrow irrigation in open field.4.Based on the above research,in order to further improve the silt film furrow irrigation infiltration law,optimizing water system management and technical elements of the design provided an important basis,for the guidance of China's grain production was of great realistic significance in add and semi-arid region suitable for large-scale popularization and application.