Abstract: The water-saving irrigation technology is significantly more than the traditional water saving irrigation techniques and efficient irrigation water use, measures and systems in general. Whether the conservation of water for irrigation and water efficiency is a unit of crop yield is the total water consumption (from water until the date field) the number of measured, or the unit value of water consumption achieved by the number of the evaluation. Because water-saving and efficient or not, or not, are relative concepts, so water-saving irrigation technology is also a constant, is also increasing its efficiency.

Key words: water-saving irrigation technology to promote development of

Water-saving irrigation technology is significantly more than the traditional irrigation techniques to save water and water efficient irrigation methods, measures and systems in general. Whether the conservation of water for irrigation and water efficiency is a unit of crop yield is the total water consumption (from water until the date field) the number of measured, or the unit value of water consumption achieved by the number of the evaluation. Because of water-saving and efficient or not, or not, are relative concepts, it is also the continuous development of water-saving irrigation technologies, their efficiency is also increasing.

  China's development of water-saving irrigation technology, and China is almost as long as the history of modern irrigation, as long as water-saving irrigation should be considered, in the early Jinghuiqu, Wei Hui-old irrigation drains and luohui creek on technical factors in optimizing the surface irrigation done a lot of useful exploration and gain some valuable experience. In the twentieth century, sixties and the seventies began to promote the area, Zhejiang, concrete and concrete underground channels. The twentieth century, there are some parts of the fifties and the pilot started sprinkling. The seventies of the twentieth century, irrigation technologies are subject to widespread attention, have held several national technical discussion and promotion of the General Assembly, regardless of the exchange of technical experience, also is preparing public opinion have both played a good role. By 1977 the country has reached 290 million mu of irrigation area. Water and Chinese Academy of Sciences, a machine closely with the Ministry and other ministries, organize the staff setting up a joint design team in the development of irrigation equipment, field comparison tests, sprinkler system design method, zoning and so made a lot of scientific research work, to the eighties of the twentieth century can be said that in sprinkler irrigation in our country already has its own set of equipment and technology, in order to spray a large area to create the conditions for the promotion. Allowing irrigation area of the country is now about 13 million acres. In this process, the development of irrigation has also appeared in two low tide, once the initial equipment, but due to customs and thus dampened the enthusiasm of the masses result, one is due to changes in agricultural production systems, and early spray technology 1:00 unable to adapt to making. The drip irrigation technology is imported from Mexico in 1974, three drip irrigation system began. China's scientific and technical personnel has absorbed the advanced experience of foreign countries, developed a complete set suitable to China's use of drip irrigation and micro-irrigation equipment, micro-irrigation area of the country now has reached tens of hectares. Since the development of plastics, to the twentieth century, eighties underground water technology, has been a new life has developed into a low-pressure pipe irrigation water, mainly in low-pressure plastic pipe water supply, there are still elements of concrete pipe used in other low-pressure pipe water supply According to 1993 statistics, the whole country an area of more than 3.33 million hectares. As for the channel seepage control technology to develop more long history, it is with the scale of irrigation development and production of new materials constantly updated developments. In recent years, leaders at all levels of water-saving irrigation, the growing importance that the various news media also greatly enhanced water-saving irrigation and propaganda, to develop water-saving irrigation in a new wave has been formed. This time is characterized by fever: not a single development of a certain kind of water-saving irrigation technologies, but together on a variety of water-saving irrigation technologies.

  Today, China has been introduced and are studying or promoting the use of dozens of water-saving irrigation technologies as much. Various technologies have their advantages and disadvantages, each with a different application conditions. But some technologies mature, some of these technologies remains to be further study, some technical advantages over more applicable to a wider more, nothing less and some technology. Water-saving irrigation techniques can be divided into irrigation methods, water method, irrigation systems and field support measures four categories.

1, water-saving irrigation methods irrigation methods for field water distribution methods, that is, how would have been sent to the farms of the irrigation water evenly distributed to the crop root active layer and going. By irrigation water, through what channels the active layer into the root system, irrigation methods can be divided into surface irrigation, sprinkler irrigation, micro-irrigation and underground irrigation. (A) surface irrigation surface irrigation is an ancient traditional irrigation methods, in general, whether it is water-saving starting point for comparison. However, the continuous development of surface irrigation technology has continuously improved, so recently, there are many more than conventional surface irrigation technology, water-saving methods.

1. Irrigation technical elements of the technical elements that optimize the irrigation ditch, furrow specification, into the furrow (groove) traffic, changing water into a few. The irrigation technology elements will be a reasonable combination of water-saving effect, the general experience has shown that pairs of furrow and border irrigation using smaller furrow, groove dimensions, we can greatly enhance the efficiency of irrigation uniformity and irrigation, that is often said that a small plot of short - groove furrow. As for the size of what is appropriate groove furrow, due to topography and soil varies in different localities to be determined by experiment.

2. The new tools for groove furrow irrigation ditch the traditional furrow irrigation is used with artificial drainage from the drainage into the ditch furrow opening, it is neither accurate and inconvenient, and often I turn on the water leakage due to field caused by the loss of water, foreign adoption has always already siphon (for open channel of water) or the gate-hole pipe (for pipe-borne water in case) turn on the water, our country has done some testing, proven to improve the field of water utilization rate of 5-10%, but the bulk of the tool has not been production, but farmers are not used to promote quick or easy fixes.

3. Surge irrigation has developed in modern foreign Surge (ditch) also known as intermittent border irrigation ditch (furrow) irrigation, that is, into the groove (furrow) and flow is intermittent, and to the field might take a long time (minutes or tens of minutes ) and then stop the drainage of water for some time (minutes or tens of minutes), and so forth, so that you can make along the trench (furrow) length of the water distributed more evenly. Field of water utilization factor of up to 80% a 90%. Is a promising water-saving irrigation methods. In China since the early 90s, some units have been research and pilot projects, but in order to achieve the purpose of intermittent drainage is necessary in the field can be controlled intermittent drainage layout of the device (there are two kinds of mechanical valves and control valves). To produce a working, reliable, inexpensive intermittent drainage device is the key to promoting this technology. 4. Tail-water recovery system in the soil infiltration