Study On The Technology Of Water-saving And Yield-increaing Of Rice In Cold Field

China is the world's rice production and consumption power, rice planting area and output in the world, tops the first. Moreover, rice cultivation requires a lot of water support, production per mu of irrigation water than 800m3, 1kg of rice production in irrigated 1 ~ 2t water. Its water consumption accounts for 54% of the total water consumption is about the total agricultural water consumption accounts for 65% or more, is known as the first major water users society. In China, water is a relatively poor agricultural country, the national average of about 2.81 trillion total water resources m3, accounting for 8% of the world's total water resources.Only about the per capita possession of water resources per capita water resources in the world 1 / 4, belong to the world, one of 13 water-poor countries. It is estimated that China's average paddy irrigation water use efficiency was about 0.8kg/m3, only about 40% in developed countries. Therefore, high-yield rice water saving technology to strengthen research on the ease water crisis and achieve sustainable development of rice production is important.Heilongjiang Province is an important grain production base, and an area under rice cultivation in North, the largest province in total. In the province of rice irrigation water up to 16 billion m3, accounting for 93% of agriculture in water, irrigation water efficiency on average is around 0.4. Therefore, the study control rice yield saving irrigation techniques, improved water use efficiency, reduce rice water use, to alleviate water shortages in our province and the sustainable development of paddy fields is important.This study is peace Qing'an County Irrigation Irrigation Experiment Station rice field experiments, Orthogonal experimental design, through the study of different irrigation techniques (control irrigation techniques and conventional irrigation technologies) mode, planting patterns and varieties of rice paddy Festival water and rice yield in order to seek control of irrigation mode yield of rice in cold water the best combination of technologies to the development of Heilongjiang Province, rice water-saving irrigation techniques, particularly control of irrigation of rice for the promotion of technology theory. The main findings are as follows:1 through control of irrigation on rice under different growth conditions dynamic analysis, obtained under the control of irrigation patterns in various growth stages of rice suitable for the water control can improve soil moisture conditions, resulting in improved rice growth environment , nutrients and water can be reasonably allocated to each period of rice growth, promote the healthy growth of rice, has a good physiological and ecological characteristics and population structure.2 the use of controlled irrigation and appropriate planting densities and improved varieties suitable for the integration model, can improve water use efficiency, to achieve water yield.