Study On The Technology And Pattern Of Water-saving Irrigation And Water Management Of Rice In Jilin Province

Rice irrigation is always large.the traditional rice irrigation are long-term deepwater、 flooding irrigation, and it waste water, the output is not so signaficant.Therefore, the rice irrigation water saving potential is tremendous. Jilin province isan important commodity grain production base and is one of lack of water provincesof China. At present, planting rice of jilin province, the mian form of planting is thetraditional flooding irrigation, the existing water saving irrigation and water savingirrigation project to give priority to, and there is few water management model ofwater saving measures technology which according to rice crop physiology law ofwater, soil condition and so on under the condition, so this will be seriously hinderedthe rice water saving irrigation of jilin province effect significantly.In this paper, according to the specific natural climate of jilin province、the ricephysiological law of water and soil conditions of the rice paddies, we carried out theexperiment of water management pattern and non-sufficient irrigation in2011in jilinprovince at the YongJi town, and got a first-hand datas, and according to theexperiment datas, I study and establish the system of irrigation of the optimization ofthe rice fields of jilin province and the high yield of the water saving watermanagement pattern, and in order to achieve high yield, and to save water and givethe ecological environment improved. The main research contents are as follows:1. In this paper, we choose the ChaoJI rice for the yield experiment in YongJitown Jilin province, after the field observation in2011, we obtained the first-handthe experiment datas.2. According to the comparison test,test-pit experiments and hydrological andmeteorological data of different water management model, solving the evaporation,seepage, in different growth stages of Chaoji rice varieties in Jilin Province.studiedthe growth period of Chaoji rice water requirement, water consumption, analysisingevapotranspiration, leakage and the final yield of rice in different water managementon Chaoji rice. Studies show that in jointing-booting stage and heading stage is theblossom of super rice in the whole growth period of key water requirement period.Different water management pattern of rice have a significant effects on theevapotranspiration, leakage, water consumption and yield.3According to the meteorological, hydrological, crop and test data of Chaojirice, testing and verification the parameter on the growth simulation model of ORYZA2000of the rice, the model can be used to simulate Chaoji rice growth andyield formation in Jilin province area; meanwhile using ORYZA2000model tosimulation and analysis growth and development and yield formation process,undertake field surface layer simulation, the factors of water balance and waterproductivity simulation analysis under different water management pattern of Chaojirice in Jilin province.3. Using meteorological data of field and start the Parameter calibration ofORYZA2000growth simulation model, and test the adaptability of ChaoJi rice ofjilin province.Considering the reality application restrictions, and the modelsimulation effect, can draw the conclusion that after parameters calibration after theORYZA2000model basically can be used to simulate the growth characteristics andrice yield of water balance condition, the model has better adaptability to simulatethe yield of ChaoJi rice jilin province.4Through the non-sufficient irrigation experiment data, we analysis of rice lawof water, and the Minhas, Jensen, Blank, Stewart, Singh five kinds of calculation, theresult show the Jensen water production function model is the most suitable forexperimental water production function model, it is concluded that the moisturesensitive coefficients for Tillering stage, jointing booting stage, heading blossomstage and milk stage are:0.1104,0.2902,0.4924,0.107respectively.5. On the basis of t water yield production function, using the dynamicprogramming method to establish the yield of the irrigation system optimizationmodel of jilin province underthe insufficient irrigation of and solve it, determinedhebest share of the different irrigation quota in different growth super rice, the limitedwater resources can be used to irrigate the the most sensitive period of rice，and canbe greatly saving the irrigation water, increasing water productivity, has significantmeaning for guiding water saving irrigation for rice of jilin province.